Issue #13415: Test in configure if unsetenv() has a return value or not.

Modules/posixmodule.c

@@ -6185,18 +6185,24 @@ posix_unsetenv(PyObject *self, PyObject *args)
 {
     PyObject *os1;
     char *s1;
+#ifndef HAVE_BROKEN_UNSETENV
     int err;
+#endif
 
     if (!PyArg_ParseTuple(args, "O&:unsetenv",
                           PyUnicode_FSConverter, &os1))
         return NULL;
     s1 = PyBytes_AsString(os1);
 
+#ifdef HAVE_BROKEN_UNSETENV
+    unsetenv(s1);
+#else
     err = unsetenv(s1);
     if (err) {
         Py_DECREF(os1);
         return posix_error();
     }
+#endif
 
     /* Remove the key from posix_putenv_garbage;
      * this will cause it to be collected.  This has to

configure

 #! /bin/sh
 # From configure.in Revision.
 # Guess values for system-dependent variables and create Makefiles.
-# Generated by GNU Autoconf 2.68 for python 3.2.
+# Generated by GNU Autoconf 2.67 for python 3.2.
 #
 # Report bugs to <http://bugs.python.org/>.
 #
@@ -92,7 +92,6 @@ fi
 IFS=" ""	$as_nl"
 
 # Find who we are.  Look in the path if we contain no directory separator.
-as_myself=
 case $0 in #((
   *[\\/]* ) as_myself=$0 ;;
   *) as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
@@ -218,18 +217,11 @@ IFS=$as_save_IFS
   # We cannot yet assume a decent shell, so we have to provide a
 	# neutralization value for shells without unset; and this also
 	# works around shells that cannot unset nonexistent variables.
-	# Preserve -v and -x to the replacement shell.
 	BASH_ENV=/dev/null
 	ENV=/dev/null
 	(unset BASH_ENV) >/dev/null 2>&1 && unset BASH_ENV ENV
 	export CONFIG_SHELL
-	case $- in # ((((
-	  *v*x* | *x*v* ) as_opts=-vx ;;
-	  *v* ) as_opts=-v ;;
-	  *x* ) as_opts=-x ;;
-	  * ) as_opts= ;;
-	esac
-	exec "$CONFIG_SHELL" $as_opts "$as_myself" ${1+"$@"}
+	exec "$CONFIG_SHELL" "$as_myself" ${1+"$@"}
 fi
 
     if test x$as_have_required = xno; then :
@@ -1186,7 +1178,7 @@ Try \`$0 --help' for more information"
     $as_echo "$as_me: WARNING: you should use --build, --host, --target" >&2
     expr "x$ac_option" : ".*[^-._$as_cr_alnum]" >/dev/null &&
       $as_echo "$as_me: WARNING: invalid host type: $ac_option" >&2
-    : "${build_alias=$ac_option} ${host_alias=$ac_option} ${target_alias=$ac_option}"
+    : ${build_alias=$ac_option} ${host_alias=$ac_option} ${target_alias=$ac_option}
     ;;
 
   esac
@@ -1524,7 +1516,7 @@ test -n "$ac_init_help" && exit $ac_status
 if $ac_init_version; then
   cat <<\_ACEOF
 python configure 3.2
-generated by GNU Autoconf 2.68
+generated by GNU Autoconf 2.67
 
 Copyright (C) 2010 Free Software Foundation, Inc.
 This configure script is free software; the Free Software Foundation
@@ -1570,7 +1562,7 @@ sed 's/^/| /' conftest.$ac_ext >&5
 
 	ac_retval=1
 fi
-  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
+  eval $as_lineno_stack; test "x$as_lineno_stack" = x && { as_lineno=; unset as_lineno;}
   as_fn_set_status $ac_retval
 
 } # ac_fn_c_try_compile
@@ -1616,7 +1608,7 @@ fi
   # interfere with the next link command; also delete a directory that is
   # left behind by Apple's compiler.  We do this before executing the actions.
   rm -rf conftest.dSYM conftest_ipa8_conftest.oo
-  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
+  eval $as_lineno_stack; test "x$as_lineno_stack" = x && { as_lineno=; unset as_lineno;}
   as_fn_set_status $ac_retval
 
 } # ac_fn_c_try_link
@@ -1653,7 +1645,7 @@ sed 's/^/| /' conftest.$ac_ext >&5
 
     ac_retval=1
 fi
-  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
+  eval $as_lineno_stack; test "x$as_lineno_stack" = x && { as_lineno=; unset as_lineno;}
   as_fn_set_status $ac_retval
 
 } # ac_fn_c_try_cpp
@@ -1666,10 +1658,10 @@ fi
 ac_fn_c_check_header_mongrel ()
 {
   as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
-  if eval \${$3+:} false; then :
+  if eval "test \"\${$3+set}\"" = set; then :
   { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $2" >&5
 $as_echo_n "checking for $2... " >&6; }
-if eval \${$3+:} false; then :
+if eval "test \"\${$3+set}\"" = set; then :
   $as_echo_n "(cached) " >&6
 fi
 eval ac_res=\$$3
@@ -1736,7 +1728,7 @@ $as_echo "$as_me: WARNING: $2: proceeding with the compiler's result" >&2;}
 esac
   { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $2" >&5
 $as_echo_n "checking for $2... " >&6; }
-if eval \${$3+:} false; then :
+if eval "test \"\${$3+set}\"" = set; then :
   $as_echo_n "(cached) " >&6
 else
   eval "$3=\$ac_header_compiler"
@@ -1745,7 +1737,7 @@ eval ac_res=\$$3
 	       { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
 $as_echo "$ac_res" >&6; }
 fi
-  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
+  eval $as_lineno_stack; test "x$as_lineno_stack" = x && { as_lineno=; unset as_lineno;}
 
 } # ac_fn_c_check_header_mongrel
 
@@ -1786,7 +1778,7 @@ sed 's/^/| /' conftest.$ac_ext >&5
        ac_retval=$ac_status
 fi
   rm -rf conftest.dSYM conftest_ipa8_conftest.oo
-  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
+  eval $as_lineno_stack; test "x$as_lineno_stack" = x && { as_lineno=; unset as_lineno;}
   as_fn_set_status $ac_retval
 
 } # ac_fn_c_try_run
@@ -1800,7 +1792,7 @@ ac_fn_c_check_header_compile ()
   as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
   { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $2" >&5
 $as_echo_n "checking for $2... " >&6; }
-if eval \${$3+:} false; then :
+if eval "test \"\${$3+set}\"" = set; then :
   $as_echo_n "(cached) " >&6
 else
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
@@ -1818,7 +1810,7 @@ fi
 eval ac_res=\$$3
 	       { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
 $as_echo "$ac_res" >&6; }
-  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
+  eval $as_lineno_stack; test "x$as_lineno_stack" = x && { as_lineno=; unset as_lineno;}
 
 } # ac_fn_c_check_header_compile
 
@@ -1831,7 +1823,7 @@ ac_fn_c_check_type ()
   as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
   { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $2" >&5
 $as_echo_n "checking for $2... " >&6; }
-if eval \${$3+:} false; then :
+if eval "test \"\${$3+set}\"" = set; then :
   $as_echo_n "(cached) " >&6
 else
   eval "$3=no"
@@ -1872,7 +1864,7 @@ fi
 eval ac_res=\$$3
 	       { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
 $as_echo "$ac_res" >&6; }
-  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
+  eval $as_lineno_stack; test "x$as_lineno_stack" = x && { as_lineno=; unset as_lineno;}
 
 } # ac_fn_c_check_type
 
@@ -1885,7 +1877,7 @@ ac_fn_c_find_uintX_t ()
   as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
   { $as_echo "$as_me:${as_lineno-$LINENO}: checking for uint$2_t" >&5
 $as_echo_n "checking for uint$2_t... " >&6; }
-if eval \${$3+:} false; then :
+if eval "test \"\${$3+set}\"" = set; then :
   $as_echo_n "(cached) " >&6
 else
   eval "$3=no"
@@ -1925,7 +1917,7 @@ fi
 eval ac_res=\$$3
 	       { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
 $as_echo "$ac_res" >&6; }
-  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
+  eval $as_lineno_stack; test "x$as_lineno_stack" = x && { as_lineno=; unset as_lineno;}
 
 } # ac_fn_c_find_uintX_t
 
@@ -1938,7 +1930,7 @@ ac_fn_c_find_intX_t ()
   as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
   { $as_echo "$as_me:${as_lineno-$LINENO}: checking for int$2_t" >&5
 $as_echo_n "checking for int$2_t... " >&6; }
-if eval \${$3+:} false; then :
+if eval "test \"\${$3+set}\"" = set; then :
   $as_echo_n "(cached) " >&6
 else
   eval "$3=no"
@@ -1999,7 +1991,7 @@ fi
 eval ac_res=\$$3
 	       { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
 $as_echo "$ac_res" >&6; }
-  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
+  eval $as_lineno_stack; test "x$as_lineno_stack" = x && { as_lineno=; unset as_lineno;}
 
 } # ac_fn_c_find_intX_t
 
@@ -2176,7 +2168,7 @@ rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
 rm -f conftest.val
 
   fi
-  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
+  eval $as_lineno_stack; test "x$as_lineno_stack" = x && { as_lineno=; unset as_lineno;}
   as_fn_set_status $ac_retval
 
 } # ac_fn_c_compute_int
@@ -2189,7 +2181,7 @@ ac_fn_c_check_func ()
   as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
   { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $2" >&5
 $as_echo_n "checking for $2... " >&6; }
-if eval \${$3+:} false; then :
+if eval "test \"\${$3+set}\"" = set; then :
   $as_echo_n "(cached) " >&6
 else
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
@@ -2244,7 +2236,7 @@ fi
 eval ac_res=\$$3
 	       { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
 $as_echo "$ac_res" >&6; }
-  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
+  eval $as_lineno_stack; test "x$as_lineno_stack" = x && { as_lineno=; unset as_lineno;}
 
 } # ac_fn_c_check_func
 
@@ -2257,7 +2249,7 @@ ac_fn_c_check_member ()
   as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
   { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $2.$3" >&5
 $as_echo_n "checking for $2.$3... " >&6; }
-if eval \${$4+:} false; then :
+if eval "test \"\${$4+set}\"" = set; then :
   $as_echo_n "(cached) " >&6
 else
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
@@ -2301,7 +2293,7 @@ fi
 eval ac_res=\$$4
 	       { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
 $as_echo "$ac_res" >&6; }
-  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
+  eval $as_lineno_stack; test "x$as_lineno_stack" = x && { as_lineno=; unset as_lineno;}
 
 } # ac_fn_c_check_member
 
@@ -2316,7 +2308,7 @@ ac_fn_c_check_decl ()
   as_decl_use=`echo $2|sed -e 's/(/((/' -e 's/)/) 0&/' -e 's/,/) 0& (/g'`
   { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether $as_decl_name is declared" >&5
 $as_echo_n "checking whether $as_decl_name is declared... " >&6; }
-if eval \${$3+:} false; then :
+if eval "test \"\${$3+set}\"" = set; then :
   $as_echo_n "(cached) " >&6
 else
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
@@ -2347,7 +2339,7 @@ fi
 eval ac_res=\$$3
 	       { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
 $as_echo "$ac_res" >&6; }
-  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
+  eval $as_lineno_stack; test "x$as_lineno_stack" = x && { as_lineno=; unset as_lineno;}
 
 } # ac_fn_c_check_decl
 cat >config.log <<_ACEOF
@@ -2355,7 +2347,7 @@ This file contains any messages produced by compilers while
 running configure, to aid debugging if configure makes a mistake.
 
 It was created by python $as_me 3.2, which was
-generated by GNU Autoconf 2.68.  Invocation command line was
+generated by GNU Autoconf 2.67.  Invocation command line was
 
   $ $0 $@
 
@@ -2613,7 +2605,7 @@ $as_echo "$as_me: loading site script $ac_site_file" >&6;}
       || { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
 $as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
 as_fn_error $? "failed to load site script $ac_site_file
-See \`config.log' for more details" "$LINENO" 5; }
+See \`config.log' for more details" "$LINENO" 5 ; }
   fi
 done
 
@@ -3203,7 +3195,7 @@ if test -n "$ac_tool_prefix"; then
 set dummy ${ac_tool_prefix}gcc; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_CC+:} false; then :
+if test "${ac_cv_prog_CC+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if test -n "$CC"; then
@@ -3243,7 +3235,7 @@ if test -z "$ac_cv_prog_CC"; then
 set dummy gcc; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_ac_ct_CC+:} false; then :
+if test "${ac_cv_prog_ac_ct_CC+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if test -n "$ac_ct_CC"; then
@@ -3296,7 +3288,7 @@ if test -z "$CC"; then
 set dummy ${ac_tool_prefix}cc; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_CC+:} false; then :
+if test "${ac_cv_prog_CC+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if test -n "$CC"; then
@@ -3336,7 +3328,7 @@ if test -z "$CC"; then
 set dummy cc; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_CC+:} false; then :
+if test "${ac_cv_prog_CC+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if test -n "$CC"; then
@@ -3395,7 +3387,7 @@ if test -z "$CC"; then
 set dummy $ac_tool_prefix$ac_prog; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_CC+:} false; then :
+if test "${ac_cv_prog_CC+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if test -n "$CC"; then
@@ -3439,7 +3431,7 @@ do
 set dummy $ac_prog; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_ac_ct_CC+:} false; then :
+if test "${ac_cv_prog_ac_ct_CC+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if test -n "$ac_ct_CC"; then
@@ -3494,7 +3486,7 @@ fi
 test -z "$CC" && { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
 $as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
 as_fn_error $? "no acceptable C compiler found in \$PATH
-See \`config.log' for more details" "$LINENO" 5; }
+See \`config.log' for more details" "$LINENO" 5 ; }
 
 # Provide some information about the compiler.
 $as_echo "$as_me:${as_lineno-$LINENO}: checking for C compiler version" >&5
@@ -3609,7 +3601,7 @@ sed 's/^/| /' conftest.$ac_ext >&5
 { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
 $as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
 as_fn_error 77 "C compiler cannot create executables
-See \`config.log' for more details" "$LINENO" 5; }
+See \`config.log' for more details" "$LINENO" 5 ; }
 else
   { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 $as_echo "yes" >&6; }
@@ -3652,7 +3644,7 @@ else
   { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
 $as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
 as_fn_error $? "cannot compute suffix of executables: cannot compile and link
-See \`config.log' for more details" "$LINENO" 5; }
+See \`config.log' for more details" "$LINENO" 5 ; }
 fi
 rm -f conftest conftest$ac_cv_exeext
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_exeext" >&5
@@ -3711,7 +3703,7 @@ $as_echo "$ac_try_echo"; } >&5
 $as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
 as_fn_error $? "cannot run C compiled programs.
 If you meant to cross compile, use \`--host'.
-See \`config.log' for more details" "$LINENO" 5; }
+See \`config.log' for more details" "$LINENO" 5 ; }
     fi
   fi
 fi
@@ -3722,7 +3714,7 @@ rm -f conftest.$ac_ext conftest$ac_cv_exeext conftest.out
 ac_clean_files=$ac_clean_files_save
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for suffix of object files" >&5
 $as_echo_n "checking for suffix of object files... " >&6; }
-if ${ac_cv_objext+:} false; then :
+if test "${ac_cv_objext+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
@@ -3763,7 +3755,7 @@ sed 's/^/| /' conftest.$ac_ext >&5
 { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
 $as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
 as_fn_error $? "cannot compute suffix of object files: cannot compile
-See \`config.log' for more details" "$LINENO" 5; }
+See \`config.log' for more details" "$LINENO" 5 ; }
 fi
 rm -f conftest.$ac_cv_objext conftest.$ac_ext
 fi
@@ -3773,7 +3765,7 @@ OBJEXT=$ac_cv_objext
 ac_objext=$OBJEXT
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether we are using the GNU C compiler" >&5
 $as_echo_n "checking whether we are using the GNU C compiler... " >&6; }
-if ${ac_cv_c_compiler_gnu+:} false; then :
+if test "${ac_cv_c_compiler_gnu+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
@@ -3810,7 +3802,7 @@ ac_test_CFLAGS=${CFLAGS+set}
 ac_save_CFLAGS=$CFLAGS
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether $CC accepts -g" >&5
 $as_echo_n "checking whether $CC accepts -g... " >&6; }
-if ${ac_cv_prog_cc_g+:} false; then :
+if test "${ac_cv_prog_cc_g+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   ac_save_c_werror_flag=$ac_c_werror_flag
@@ -3888,7 +3880,7 @@ else
 fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $CC option to accept ISO C89" >&5
 $as_echo_n "checking for $CC option to accept ISO C89... " >&6; }
-if ${ac_cv_prog_cc_c89+:} false; then :
+if test "${ac_cv_prog_cc_c89+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   ac_cv_prog_cc_c89=no
@@ -4023,7 +4015,7 @@ then
 set dummy g++; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_path_CXX+:} false; then :
+if test "${ac_cv_path_CXX+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   case $CXX in
@@ -4064,7 +4056,7 @@ fi
 set dummy c++; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_path_CXX+:} false; then :
+if test "${ac_cv_path_CXX+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   case $CXX in
@@ -4115,7 +4107,7 @@ do
 set dummy $ac_prog; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_CXX+:} false; then :
+if test "${ac_cv_prog_CXX+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if test -n "$CXX"; then
@@ -4216,7 +4208,7 @@ if test -n "$CPP" && test -d "$CPP"; then
   CPP=
 fi
 if test -z "$CPP"; then
-  if ${ac_cv_prog_CPP+:} false; then :
+  if test "${ac_cv_prog_CPP+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
       # Double quotes because CPP needs to be expanded
@@ -4332,7 +4324,7 @@ else
   { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
 $as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
 as_fn_error $? "C preprocessor \"$CPP\" fails sanity check
-See \`config.log' for more details" "$LINENO" 5; }
+See \`config.log' for more details" "$LINENO" 5 ; }
 fi
 
 ac_ext=c
@@ -4344,7 +4336,7 @@ ac_compiler_gnu=$ac_cv_c_compiler_gnu
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for grep that handles long lines and -e" >&5
 $as_echo_n "checking for grep that handles long lines and -e... " >&6; }
-if ${ac_cv_path_GREP+:} false; then :
+if test "${ac_cv_path_GREP+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if test -z "$GREP"; then
@@ -4407,7 +4399,7 @@ $as_echo "$ac_cv_path_GREP" >&6; }
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for egrep" >&5
 $as_echo_n "checking for egrep... " >&6; }
-if ${ac_cv_path_EGREP+:} false; then :
+if test "${ac_cv_path_EGREP+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if echo a | $GREP -E '(a|b)' >/dev/null 2>&1
@@ -4474,7 +4466,7 @@ $as_echo "$ac_cv_path_EGREP" >&6; }
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for ANSI C header files" >&5
 $as_echo_n "checking for ANSI C header files... " >&6; }
-if ${ac_cv_header_stdc+:} false; then :
+if test "${ac_cv_header_stdc+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
@@ -4603,7 +4595,7 @@ done
 
 
   ac_fn_c_check_header_mongrel "$LINENO" "minix/config.h" "ac_cv_header_minix_config_h" "$ac_includes_default"
-if test "x$ac_cv_header_minix_config_h" = xyes; then :
+if test "x$ac_cv_header_minix_config_h" = x""yes; then :
   MINIX=yes
 else
   MINIX=
@@ -4625,7 +4617,7 @@ $as_echo "#define _MINIX 1" >>confdefs.h
 
   { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether it is safe to define __EXTENSIONS__" >&5
 $as_echo_n "checking whether it is safe to define __EXTENSIONS__... " >&6; }
-if ${ac_cv_safe_to_define___extensions__+:} false; then :
+if test "${ac_cv_safe_to_define___extensions__+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
@@ -4818,7 +4810,7 @@ $as_echo "$GNULD" >&6; }
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for inline" >&5
 $as_echo_n "checking for inline... " >&6; }
-if ${ac_cv_c_inline+:} false; then :
+if test "${ac_cv_c_inline+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   ac_cv_c_inline=no
@@ -5019,7 +5011,7 @@ if test -n "$ac_tool_prefix"; then
 set dummy ${ac_tool_prefix}ranlib; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_RANLIB+:} false; then :
+if test "${ac_cv_prog_RANLIB+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if test -n "$RANLIB"; then
@@ -5059,7 +5051,7 @@ if test -z "$ac_cv_prog_RANLIB"; then
 set dummy ranlib; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_ac_ct_RANLIB+:} false; then :
+if test "${ac_cv_prog_ac_ct_RANLIB+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if test -n "$ac_ct_RANLIB"; then
@@ -5113,7 +5105,7 @@ do
 set dummy $ac_prog; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_AR+:} false; then :
+if test "${ac_cv_prog_AR+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if test -n "$AR"; then
@@ -5163,7 +5155,7 @@ fi
 set dummy svnversion; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_SVNVERSION+:} false; then :
+if test "${ac_cv_prog_SVNVERSION+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if test -n "$SVNVERSION"; then
@@ -5214,7 +5206,7 @@ then
 set dummy hg; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_HAS_HG+:} false; then :
+if test "${ac_cv_prog_HAS_HG+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if test -n "$HAS_HG"; then
@@ -5268,7 +5260,7 @@ DISABLE_ASDLGEN=""
 set dummy python; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_HAS_PYTHON+:} false; then :
+if test "${ac_cv_prog_HAS_PYTHON+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if test -n "$HAS_PYTHON"; then
@@ -5362,7 +5354,7 @@ ac_configure="$SHELL $ac_aux_dir/configure"  # Please don't use this var.
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for a BSD-compatible install" >&5
 $as_echo_n "checking for a BSD-compatible install... " >&6; }
 if test -z "$INSTALL"; then
-if ${ac_cv_path_install+:} false; then :
+if test "${ac_cv_path_install+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
@@ -5554,7 +5546,7 @@ $as_echo_n "checking whether $CC accepts and needs -fno-strict-aliasing... " >&6
      ac_save_cc="$CC"
      CC="$CC -fno-strict-aliasing"
      save_CFLAGS="$CFLAGS"
-     if ${ac_cv_no_strict_aliasing+:} false; then :
+     if test "${ac_cv_no_strict_aliasing+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
@@ -5810,7 +5802,7 @@ fi
 # options before we can check whether -Kpthread improves anything.
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether pthreads are available without options" >&5
 $as_echo_n "checking whether pthreads are available without options... " >&6; }
-if ${ac_cv_pthread_is_default+:} false; then :
+if test "${ac_cv_pthread_is_default+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if test "$cross_compiling" = yes; then :
@@ -5863,7 +5855,7 @@ else
 # function available.
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether $CC accepts -Kpthread" >&5
 $as_echo_n "checking whether $CC accepts -Kpthread... " >&6; }
-if ${ac_cv_kpthread+:} false; then :
+if test "${ac_cv_kpthread+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   ac_save_cc="$CC"
@@ -5912,7 +5904,7 @@ then
 # function available.
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether $CC accepts -Kthread" >&5
 $as_echo_n "checking whether $CC accepts -Kthread... " >&6; }
-if ${ac_cv_kthread+:} false; then :
+if test "${ac_cv_kthread+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   ac_save_cc="$CC"
@@ -5961,7 +5953,7 @@ then
 # function available.
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether $CC accepts -pthread" >&5
 $as_echo_n "checking whether $CC accepts -pthread... " >&6; }
-if ${ac_cv_thread+:} false; then :
+if test "${ac_cv_thread+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   ac_save_cc="$CC"
@@ -6046,7 +6038,7 @@ CXX="$ac_save_cxx"
 # checks for header files
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for ANSI C header files" >&5
 $as_echo_n "checking for ANSI C header files... " >&6; }
-if ${ac_cv_header_stdc+:} false; then :
+if test "${ac_cv_header_stdc+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
@@ -6185,7 +6177,7 @@ for ac_hdr in dirent.h sys/ndir.h sys/dir.h ndir.h; do
   as_ac_Header=`$as_echo "ac_cv_header_dirent_$ac_hdr" | $as_tr_sh`
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_hdr that defines DIR" >&5
 $as_echo_n "checking for $ac_hdr that defines DIR... " >&6; }
-if eval \${$as_ac_Header+:} false; then :
+if eval "test \"\${$as_ac_Header+set}\"" = set; then :
   $as_echo_n "(cached) " >&6
 else
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
@@ -6225,7 +6217,7 @@ done
 if test $ac_header_dirent = dirent.h; then
   { $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing opendir" >&5
 $as_echo_n "checking for library containing opendir... " >&6; }
-if ${ac_cv_search_opendir+:} false; then :
+if test "${ac_cv_search_opendir+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   ac_func_search_save_LIBS=$LIBS
@@ -6259,11 +6251,11 @@ for ac_lib in '' dir; do
 fi
 rm -f core conftest.err conftest.$ac_objext \
     conftest$ac_exeext
-  if ${ac_cv_search_opendir+:} false; then :
+  if test "${ac_cv_search_opendir+set}" = set; then :
   break
 fi
 done
-if ${ac_cv_search_opendir+:} false; then :
+if test "${ac_cv_search_opendir+set}" = set; then :
 
 else
   ac_cv_search_opendir=no
@@ -6282,7 +6274,7 @@ fi
 else
   { $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing opendir" >&5
 $as_echo_n "checking for library containing opendir... " >&6; }
-if ${ac_cv_search_opendir+:} false; then :
+if test "${ac_cv_search_opendir+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   ac_func_search_save_LIBS=$LIBS
@@ -6316,11 +6308,11 @@ for ac_lib in '' x; do
 fi
 rm -f core conftest.err conftest.$ac_objext \
     conftest$ac_exeext
-  if ${ac_cv_search_opendir+:} false; then :
+  if test "${ac_cv_search_opendir+set}" = set; then :
   break
 fi
 done
-if ${ac_cv_search_opendir+:} false; then :
+if test "${ac_cv_search_opendir+set}" = set; then :
 
 else
   ac_cv_search_opendir=no
@@ -6340,7 +6332,7 @@ fi
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether sys/types.h defines makedev" >&5
 $as_echo_n "checking whether sys/types.h defines makedev... " >&6; }
-if ${ac_cv_header_sys_types_h_makedev+:} false; then :
+if test "${ac_cv_header_sys_types_h_makedev+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
@@ -6368,7 +6360,7 @@ $as_echo "$ac_cv_header_sys_types_h_makedev" >&6; }
 
 if test $ac_cv_header_sys_types_h_makedev = no; then
 ac_fn_c_check_header_mongrel "$LINENO" "sys/mkdev.h" "ac_cv_header_sys_mkdev_h" "$ac_includes_default"
-if test "x$ac_cv_header_sys_mkdev_h" = xyes; then :
+if test "x$ac_cv_header_sys_mkdev_h" = x""yes; then :
 
 $as_echo "#define MAJOR_IN_MKDEV 1" >>confdefs.h
 
@@ -6378,7 +6370,7 @@ fi
 
   if test $ac_cv_header_sys_mkdev_h = no; then
     ac_fn_c_check_header_mongrel "$LINENO" "sys/sysmacros.h" "ac_cv_header_sys_sysmacros_h" "$ac_includes_default"
-if test "x$ac_cv_header_sys_sysmacros_h" = xyes; then :
+if test "x$ac_cv_header_sys_sysmacros_h" = x""yes; then :
 
 $as_echo "#define MAJOR_IN_SYSMACROS 1" >>confdefs.h
 
@@ -6398,7 +6390,7 @@ do :
 #endif
 
 "
-if test "x$ac_cv_header_term_h" = xyes; then :
+if test "x$ac_cv_header_term_h" = x""yes; then :
   cat >>confdefs.h <<_ACEOF
 #define HAVE_TERM_H 1
 _ACEOF
@@ -6420,7 +6412,7 @@ do :
 #endif
 
 "
-if test "x$ac_cv_header_linux_netlink_h" = xyes; then :
+if test "x$ac_cv_header_linux_netlink_h" = x""yes; then :
   cat >>confdefs.h <<_ACEOF
 #define HAVE_LINUX_NETLINK_H 1
 _ACEOF
@@ -6586,7 +6578,7 @@ EOF
 
 # Type availability checks
 ac_fn_c_check_type "$LINENO" "mode_t" "ac_cv_type_mode_t" "$ac_includes_default"
-if test "x$ac_cv_type_mode_t" = xyes; then :
+if test "x$ac_cv_type_mode_t" = x""yes; then :
 
 else
 
@@ -6597,7 +6589,7 @@ _ACEOF
 fi
 
 ac_fn_c_check_type "$LINENO" "off_t" "ac_cv_type_off_t" "$ac_includes_default"
-if test "x$ac_cv_type_off_t" = xyes; then :
+if test "x$ac_cv_type_off_t" = x""yes; then :
 
 else
 
@@ -6608,7 +6600,7 @@ _ACEOF
 fi
 
 ac_fn_c_check_type "$LINENO" "pid_t" "ac_cv_type_pid_t" "$ac_includes_default"
-if test "x$ac_cv_type_pid_t" = xyes; then :
+if test "x$ac_cv_type_pid_t" = x""yes; then :
 
 else
 
@@ -6624,7 +6616,7 @@ cat >>confdefs.h <<_ACEOF
 _ACEOF
 
 ac_fn_c_check_type "$LINENO" "size_t" "ac_cv_type_size_t" "$ac_includes_default"
-if test "x$ac_cv_type_size_t" = xyes; then :
+if test "x$ac_cv_type_size_t" = x""yes; then :
 
 else
 
@@ -6636,7 +6628,7 @@ fi
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for uid_t in sys/types.h" >&5
 $as_echo_n "checking for uid_t in sys/types.h... " >&6; }
-if ${ac_cv_type_uid_t+:} false; then :
+if test "${ac_cv_type_uid_t+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
@@ -6715,7 +6707,7 @@ _ACEOF
 esac
 
 ac_fn_c_check_type "$LINENO" "ssize_t" "ac_cv_type_ssize_t" "$ac_includes_default"
-if test "x$ac_cv_type_ssize_t" = xyes; then :
+if test "x$ac_cv_type_ssize_t" = x""yes; then :
 
 $as_echo "#define HAVE_SSIZE_T 1" >>confdefs.h
 
@@ -6730,7 +6722,7 @@ fi
 # This bug is HP SR number 8606223364.
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking size of int" >&5
 $as_echo_n "checking size of int... " >&6; }
-if ${ac_cv_sizeof_int+:} false; then :
+if test "${ac_cv_sizeof_int+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if ac_fn_c_compute_int "$LINENO" "(long int) (sizeof (int))" "ac_cv_sizeof_int"        "$ac_includes_default"; then :
@@ -6740,7 +6732,7 @@ else
      { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
 $as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
 as_fn_error 77 "cannot compute sizeof (int)
-See \`config.log' for more details" "$LINENO" 5; }
+See \`config.log' for more details" "$LINENO" 5 ; }
    else
      ac_cv_sizeof_int=0
    fi
@@ -6763,7 +6755,7 @@ _ACEOF
 # This bug is HP SR number 8606223364.
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking size of long" >&5
 $as_echo_n "checking size of long... " >&6; }
-if ${ac_cv_sizeof_long+:} false; then :
+if test "${ac_cv_sizeof_long+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if ac_fn_c_compute_int "$LINENO" "(long int) (sizeof (long))" "ac_cv_sizeof_long"        "$ac_includes_default"; then :
@@ -6773,7 +6765,7 @@ else
      { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
 $as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
 as_fn_error 77 "cannot compute sizeof (long)
-See \`config.log' for more details" "$LINENO" 5; }
+See \`config.log' for more details" "$LINENO" 5 ; }
    else
      ac_cv_sizeof_long=0
    fi
@@ -6796,7 +6788,7 @@ _ACEOF
 # This bug is HP SR number 8606223364.
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking size of void *" >&5
 $as_echo_n "checking size of void *... " >&6; }
-if ${ac_cv_sizeof_void_p+:} false; then :
+if test "${ac_cv_sizeof_void_p+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if ac_fn_c_compute_int "$LINENO" "(long int) (sizeof (void *))" "ac_cv_sizeof_void_p"        "$ac_includes_default"; then :
@@ -6806,7 +6798,7 @@ else
      { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
 $as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
 as_fn_error 77 "cannot compute sizeof (void *)
-See \`config.log' for more details" "$LINENO" 5; }
+See \`config.log' for more details" "$LINENO" 5 ; }
    else
      ac_cv_sizeof_void_p=0
    fi
@@ -6829,7 +6821,7 @@ _ACEOF
 # This bug is HP SR number 8606223364.
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking size of short" >&5
 $as_echo_n "checking size of short... " >&6; }
-if ${ac_cv_sizeof_short+:} false; then :
+if test "${ac_cv_sizeof_short+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if ac_fn_c_compute_int "$LINENO" "(long int) (sizeof (short))" "ac_cv_sizeof_short"        "$ac_includes_default"; then :
@@ -6839,7 +6831,7 @@ else
      { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
 $as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
 as_fn_error 77 "cannot compute sizeof (short)
-See \`config.log' for more details" "$LINENO" 5; }
+See \`config.log' for more details" "$LINENO" 5 ; }
    else
      ac_cv_sizeof_short=0
    fi
@@ -6862,7 +6854,7 @@ _ACEOF
 # This bug is HP SR number 8606223364.
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking size of float" >&5
 $as_echo_n "checking size of float... " >&6; }
-if ${ac_cv_sizeof_float+:} false; then :
+if test "${ac_cv_sizeof_float+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if ac_fn_c_compute_int "$LINENO" "(long int) (sizeof (float))" "ac_cv_sizeof_float"        "$ac_includes_default"; then :
@@ -6872,7 +6864,7 @@ else
      { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
 $as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
 as_fn_error 77 "cannot compute sizeof (float)
-See \`config.log' for more details" "$LINENO" 5; }
+See \`config.log' for more details" "$LINENO" 5 ; }
    else
      ac_cv_sizeof_float=0
    fi
@@ -6895,7 +6887,7 @@ _ACEOF
 # This bug is HP SR number 8606223364.
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking size of double" >&5
 $as_echo_n "checking size of double... " >&6; }
-if ${ac_cv_sizeof_double+:} false; then :
+if test "${ac_cv_sizeof_double+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if ac_fn_c_compute_int "$LINENO" "(long int) (sizeof (double))" "ac_cv_sizeof_double"        "$ac_includes_default"; then :
@@ -6905,7 +6897,7 @@ else
      { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
 $as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
 as_fn_error 77 "cannot compute sizeof (double)
-See \`config.log' for more details" "$LINENO" 5; }
+See \`config.log' for more details" "$LINENO" 5 ; }
    else
      ac_cv_sizeof_double=0
    fi
@@ -6928,7 +6920,7 @@ _ACEOF
 # This bug is HP SR number 8606223364.
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking size of fpos_t" >&5
 $as_echo_n "checking size of fpos_t... " >&6; }
-if ${ac_cv_sizeof_fpos_t+:} false; then :
+if test "${ac_cv_sizeof_fpos_t+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if ac_fn_c_compute_int "$LINENO" "(long int) (sizeof (fpos_t))" "ac_cv_sizeof_fpos_t"        "$ac_includes_default"; then :
@@ -6938,7 +6930,7 @@ else
      { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
 $as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
 as_fn_error 77 "cannot compute sizeof (fpos_t)
-See \`config.log' for more details" "$LINENO" 5; }
+See \`config.log' for more details" "$LINENO" 5 ; }
    else
      ac_cv_sizeof_fpos_t=0
    fi
@@ -6961,7 +6953,7 @@ _ACEOF
 # This bug is HP SR number 8606223364.
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking size of size_t" >&5
 $as_echo_n "checking size of size_t... " >&6; }
-if ${ac_cv_sizeof_size_t+:} false; then :
+if test "${ac_cv_sizeof_size_t+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if ac_fn_c_compute_int "$LINENO" "(long int) (sizeof (size_t))" "ac_cv_sizeof_size_t"        "$ac_includes_default"; then :
@@ -6971,7 +6963,7 @@ else
      { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
 $as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
 as_fn_error 77 "cannot compute sizeof (size_t)
-See \`config.log' for more details" "$LINENO" 5; }
+See \`config.log' for more details" "$LINENO" 5 ; }
    else
      ac_cv_sizeof_size_t=0
    fi
@@ -6994,7 +6986,7 @@ _ACEOF
 # This bug is HP SR number 8606223364.
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking size of pid_t" >&5
 $as_echo_n "checking size of pid_t... " >&6; }
-if ${ac_cv_sizeof_pid_t+:} false; then :
+if test "${ac_cv_sizeof_pid_t+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if ac_fn_c_compute_int "$LINENO" "(long int) (sizeof (pid_t))" "ac_cv_sizeof_pid_t"        "$ac_includes_default"; then :
@@ -7004,7 +6996,7 @@ else
      { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
 $as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
 as_fn_error 77 "cannot compute sizeof (pid_t)
-See \`config.log' for more details" "$LINENO" 5; }
+See \`config.log' for more details" "$LINENO" 5 ; }
    else
      ac_cv_sizeof_pid_t=0
    fi
@@ -7054,7 +7046,7 @@ if test "$have_long_long" = yes ; then
 # This bug is HP SR number 8606223364.
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking size of long long" >&5
 $as_echo_n "checking size of long long... " >&6; }
-if ${ac_cv_sizeof_long_long+:} false; then :
+if test "${ac_cv_sizeof_long_long+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if ac_fn_c_compute_int "$LINENO" "(long int) (sizeof (long long))" "ac_cv_sizeof_long_long"        "$ac_includes_default"; then :
@@ -7064,7 +7056,7 @@ else
      { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
 $as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
 as_fn_error 77 "cannot compute sizeof (long long)
-See \`config.log' for more details" "$LINENO" 5; }
+See \`config.log' for more details" "$LINENO" 5 ; }
    else
      ac_cv_sizeof_long_long=0
    fi
@@ -7115,7 +7107,7 @@ if test "$have_long_double" = yes ; then
 # This bug is HP SR number 8606223364.
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking size of long double" >&5
 $as_echo_n "checking size of long double... " >&6; }
-if ${ac_cv_sizeof_long_double+:} false; then :
+if test "${ac_cv_sizeof_long_double+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if ac_fn_c_compute_int "$LINENO" "(long int) (sizeof (long double))" "ac_cv_sizeof_long_double"        "$ac_includes_default"; then :
@@ -7125,7 +7117,7 @@ else
      { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
 $as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
 as_fn_error 77 "cannot compute sizeof (long double)
-See \`config.log' for more details" "$LINENO" 5; }
+See \`config.log' for more details" "$LINENO" 5 ; }
    else
      ac_cv_sizeof_long_double=0
    fi
@@ -7177,7 +7169,7 @@ if test "$have_c99_bool" = yes ; then
 # This bug is HP SR number 8606223364.
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking size of _Bool" >&5
 $as_echo_n "checking size of _Bool... " >&6; }
-if ${ac_cv_sizeof__Bool+:} false; then :
+if test "${ac_cv_sizeof__Bool+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if ac_fn_c_compute_int "$LINENO" "(long int) (sizeof (_Bool))" "ac_cv_sizeof__Bool"        "$ac_includes_default"; then :
@@ -7187,7 +7179,7 @@ else
      { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
 $as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
 as_fn_error 77 "cannot compute sizeof (_Bool)
-See \`config.log' for more details" "$LINENO" 5; }
+See \`config.log' for more details" "$LINENO" 5 ; }
    else
      ac_cv_sizeof__Bool=0
    fi
@@ -7213,7 +7205,7 @@ ac_fn_c_check_type "$LINENO" "uintptr_t" "ac_cv_type_uintptr_t" "#ifdef HAVE_STD
         #include <inttypes.h>
         #endif
 "
-if test "x$ac_cv_type_uintptr_t" = xyes; then :
+if test "x$ac_cv_type_uintptr_t" = x""yes; then :
 
 cat >>confdefs.h <<_ACEOF
 #define HAVE_UINTPTR_T 1
@@ -7225,7 +7217,7 @@ _ACEOF
 # This bug is HP SR number 8606223364.
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking size of uintptr_t" >&5
 $as_echo_n "checking size of uintptr_t... " >&6; }
-if ${ac_cv_sizeof_uintptr_t+:} false; then :
+if test "${ac_cv_sizeof_uintptr_t+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if ac_fn_c_compute_int "$LINENO" "(long int) (sizeof (uintptr_t))" "ac_cv_sizeof_uintptr_t"        "$ac_includes_default"; then :
@@ -7235,7 +7227,7 @@ else
      { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
 $as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
 as_fn_error 77 "cannot compute sizeof (uintptr_t)
-See \`config.log' for more details" "$LINENO" 5; }
+See \`config.log' for more details" "$LINENO" 5 ; }
    else
      ac_cv_sizeof_uintptr_t=0
    fi
@@ -7261,7 +7253,7 @@ fi
 # This bug is HP SR number 8606223364.
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking size of off_t" >&5
 $as_echo_n "checking size of off_t... " >&6; }
-if ${ac_cv_sizeof_off_t+:} false; then :
+if test "${ac_cv_sizeof_off_t+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if ac_fn_c_compute_int "$LINENO" "(long int) (sizeof (off_t))" "ac_cv_sizeof_off_t"        "
@@ -7276,7 +7268,7 @@ else
      { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
 $as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
 as_fn_error 77 "cannot compute sizeof (off_t)
-See \`config.log' for more details" "$LINENO" 5; }
+See \`config.log' for more details" "$LINENO" 5 ; }
    else
      ac_cv_sizeof_off_t=0
    fi
@@ -7320,7 +7312,7 @@ fi
 # This bug is HP SR number 8606223364.
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking size of time_t" >&5
 $as_echo_n "checking size of time_t... " >&6; }
-if ${ac_cv_sizeof_time_t+:} false; then :
+if test "${ac_cv_sizeof_time_t+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if ac_fn_c_compute_int "$LINENO" "(long int) (sizeof (time_t))" "ac_cv_sizeof_time_t"        "
@@ -7338,7 +7330,7 @@ else
      { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
 $as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
 as_fn_error 77 "cannot compute sizeof (time_t)
-See \`config.log' for more details" "$LINENO" 5; }
+See \`config.log' for more details" "$LINENO" 5 ; }
    else
      ac_cv_sizeof_time_t=0
    fi
@@ -7395,7 +7387,7 @@ if test "$have_pthread_t" = yes ; then
 # This bug is HP SR number 8606223364.
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking size of pthread_t" >&5
 $as_echo_n "checking size of pthread_t... " >&6; }
-if ${ac_cv_sizeof_pthread_t+:} false; then :
+if test "${ac_cv_sizeof_pthread_t+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if ac_fn_c_compute_int "$LINENO" "(long int) (sizeof (pthread_t))" "ac_cv_sizeof_pthread_t"        "
@@ -7410,7 +7402,7 @@ else
      { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
 $as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
 as_fn_error 77 "cannot compute sizeof (pthread_t)
-See \`config.log' for more details" "$LINENO" 5; }
+See \`config.log' for more details" "$LINENO" 5 ; }
    else
      ac_cv_sizeof_pthread_t=0
    fi
@@ -7842,7 +7834,7 @@ $as_echo "$SHLIBS" >&6; }
 # checks for libraries
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for dlopen in -ldl" >&5
 $as_echo_n "checking for dlopen in -ldl... " >&6; }
-if ${ac_cv_lib_dl_dlopen+:} false; then :
+if test "${ac_cv_lib_dl_dlopen+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   ac_check_lib_save_LIBS=$LIBS
@@ -7876,7 +7868,7 @@ LIBS=$ac_check_lib_save_LIBS
 fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_dl_dlopen" >&5
 $as_echo "$ac_cv_lib_dl_dlopen" >&6; }
-if test "x$ac_cv_lib_dl_dlopen" = xyes; then :
+if test "x$ac_cv_lib_dl_dlopen" = x""yes; then :
   cat >>confdefs.h <<_ACEOF
 #define HAVE_LIBDL 1
 _ACEOF
@@ -7887,7 +7879,7 @@ fi
 	# Dynamic linking for SunOS/Solaris and SYSV
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for shl_load in -ldld" >&5
 $as_echo_n "checking for shl_load in -ldld... " >&6; }
-if ${ac_cv_lib_dld_shl_load+:} false; then :
+if test "${ac_cv_lib_dld_shl_load+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   ac_check_lib_save_LIBS=$LIBS
@@ -7921,7 +7913,7 @@ LIBS=$ac_check_lib_save_LIBS
 fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_dld_shl_load" >&5
 $as_echo "$ac_cv_lib_dld_shl_load" >&6; }
-if test "x$ac_cv_lib_dld_shl_load" = xyes; then :
+if test "x$ac_cv_lib_dld_shl_load" = x""yes; then :
   cat >>confdefs.h <<_ACEOF
 #define HAVE_LIBDLD 1
 _ACEOF
@@ -7935,7 +7927,7 @@ fi
 if test "$with_threads" = "yes" -o -z "$with_threads"; then
     { $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing sem_init" >&5
 $as_echo_n "checking for library containing sem_init... " >&6; }
-if ${ac_cv_search_sem_init+:} false; then :
+if test "${ac_cv_search_sem_init+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   ac_func_search_save_LIBS=$LIBS
@@ -7969,11 +7961,11 @@ for ac_lib in '' pthread rt posix4; do
 fi
 rm -f core conftest.err conftest.$ac_objext \
     conftest$ac_exeext
-  if ${ac_cv_search_sem_init+:} false; then :
+  if test "${ac_cv_search_sem_init+set}" = set; then :
   break
 fi
 done
-if ${ac_cv_search_sem_init+:} false; then :
+if test "${ac_cv_search_sem_init+set}" = set; then :
 
 else
   ac_cv_search_sem_init=no
@@ -7996,7 +7988,7 @@ fi
 # check if we need libintl for locale functions
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for textdomain in -lintl" >&5
 $as_echo_n "checking for textdomain in -lintl... " >&6; }
-if ${ac_cv_lib_intl_textdomain+:} false; then :
+if test "${ac_cv_lib_intl_textdomain+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   ac_check_lib_save_LIBS=$LIBS
@@ -8030,7 +8022,7 @@ LIBS=$ac_check_lib_save_LIBS
 fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_intl_textdomain" >&5
 $as_echo "$ac_cv_lib_intl_textdomain" >&6; }
-if test "x$ac_cv_lib_intl_textdomain" = xyes; then :
+if test "x$ac_cv_lib_intl_textdomain" = x""yes; then :
 
 $as_echo "#define WITH_LIBINTL 1" >>confdefs.h
 
@@ -8077,7 +8069,7 @@ esac
 # Most SVR4 platforms (e.g. Solaris) need -lsocket and -lnsl.
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for t_open in -lnsl" >&5
 $as_echo_n "checking for t_open in -lnsl... " >&6; }
-if ${ac_cv_lib_nsl_t_open+:} false; then :
+if test "${ac_cv_lib_nsl_t_open+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   ac_check_lib_save_LIBS=$LIBS
@@ -8111,13 +8103,13 @@ LIBS=$ac_check_lib_save_LIBS
 fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_nsl_t_open" >&5
 $as_echo "$ac_cv_lib_nsl_t_open" >&6; }
-if test "x$ac_cv_lib_nsl_t_open" = xyes; then :
+if test "x$ac_cv_lib_nsl_t_open" = x""yes; then :
   LIBS="-lnsl $LIBS"
 fi
  # SVR4
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for socket in -lsocket" >&5
 $as_echo_n "checking for socket in -lsocket... " >&6; }
-if ${ac_cv_lib_socket_socket+:} false; then :
+if test "${ac_cv_lib_socket_socket+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   ac_check_lib_save_LIBS=$LIBS
@@ -8151,7 +8143,7 @@ LIBS=$ac_check_lib_save_LIBS
 fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_socket_socket" >&5
 $as_echo "$ac_cv_lib_socket_socket" >&6; }
-if test "x$ac_cv_lib_socket_socket" = xyes; then :
+if test "x$ac_cv_lib_socket_socket" = x""yes; then :
   LIBS="-lsocket $LIBS"
 fi
  # SVR4 sockets
@@ -8177,7 +8169,7 @@ if test -n "$ac_tool_prefix"; then
 set dummy ${ac_tool_prefix}pkg-config; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_path_PKG_CONFIG+:} false; then :
+if test "${ac_cv_path_PKG_CONFIG+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   case $PKG_CONFIG in
@@ -8220,7 +8212,7 @@ if test -z "$ac_cv_path_PKG_CONFIG"; then
 set dummy pkg-config; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_path_ac_pt_PKG_CONFIG+:} false; then :
+if test "${ac_cv_path_ac_pt_PKG_CONFIG+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   case $ac_pt_PKG_CONFIG in
@@ -8502,7 +8494,7 @@ $as_echo "$unistd_defines_pthreads" >&6; }
     $as_echo "#define _REENTRANT 1" >>confdefs.h
 
     ac_fn_c_check_header_mongrel "$LINENO" "cthreads.h" "ac_cv_header_cthreads_h" "$ac_includes_default"
-if test "x$ac_cv_header_cthreads_h" = xyes; then :
+if test "x$ac_cv_header_cthreads_h" = x""yes; then :
   $as_echo "#define WITH_THREAD 1" >>confdefs.h
 
     $as_echo "#define C_THREADS 1" >>confdefs.h
@@ -8515,7 +8507,7 @@ $as_echo "#define HURD_C_THREADS 1" >>confdefs.h
 else
 
     ac_fn_c_check_header_mongrel "$LINENO" "mach/cthreads.h" "ac_cv_header_mach_cthreads_h" "$ac_includes_default"
-if test "x$ac_cv_header_mach_cthreads_h" = xyes; then :
+if test "x$ac_cv_header_mach_cthreads_h" = x""yes; then :
   $as_echo "#define WITH_THREAD 1" >>confdefs.h
 
     $as_echo "#define C_THREADS 1" >>confdefs.h
@@ -8559,7 +8551,7 @@ else
 
     LIBS=$_libs
     ac_fn_c_check_func "$LINENO" "pthread_detach" "ac_cv_func_pthread_detach"
-if test "x$ac_cv_func_pthread_detach" = xyes; then :
+if test "x$ac_cv_func_pthread_detach" = x""yes; then :
   $as_echo "#define WITH_THREAD 1" >>confdefs.h
 
     posix_threads=yes
@@ -8568,7 +8560,7 @@ else
 
     { $as_echo "$as_me:${as_lineno-$LINENO}: checking for pthread_create in -lpthreads" >&5
 $as_echo_n "checking for pthread_create in -lpthreads... " >&6; }
-if ${ac_cv_lib_pthreads_pthread_create+:} false; then :
+if test "${ac_cv_lib_pthreads_pthread_create+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   ac_check_lib_save_LIBS=$LIBS
@@ -8602,7 +8594,7 @@ LIBS=$ac_check_lib_save_LIBS
 fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_pthreads_pthread_create" >&5
 $as_echo "$ac_cv_lib_pthreads_pthread_create" >&6; }
-if test "x$ac_cv_lib_pthreads_pthread_create" = xyes; then :
+if test "x$ac_cv_lib_pthreads_pthread_create" = x""yes; then :
   $as_echo "#define WITH_THREAD 1" >>confdefs.h
 
     posix_threads=yes
@@ -8612,7 +8604,7 @@ else
 
     { $as_echo "$as_me:${as_lineno-$LINENO}: checking for pthread_create in -lc_r" >&5
 $as_echo_n "checking for pthread_create in -lc_r... " >&6; }
-if ${ac_cv_lib_c_r_pthread_create+:} false; then :
+if test "${ac_cv_lib_c_r_pthread_create+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   ac_check_lib_save_LIBS=$LIBS
@@ -8646,7 +8638,7 @@ LIBS=$ac_check_lib_save_LIBS
 fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_c_r_pthread_create" >&5
 $as_echo "$ac_cv_lib_c_r_pthread_create" >&6; }
-if test "x$ac_cv_lib_c_r_pthread_create" = xyes; then :
+if test "x$ac_cv_lib_c_r_pthread_create" = x""yes; then :
   $as_echo "#define WITH_THREAD 1" >>confdefs.h
 
     posix_threads=yes
@@ -8656,7 +8648,7 @@ else
 
     { $as_echo "$as_me:${as_lineno-$LINENO}: checking for __pthread_create_system in -lpthread" >&5
 $as_echo_n "checking for __pthread_create_system in -lpthread... " >&6; }
-if ${ac_cv_lib_pthread___pthread_create_system+:} false; then :
+if test "${ac_cv_lib_pthread___pthread_create_system+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   ac_check_lib_save_LIBS=$LIBS
@@ -8690,7 +8682,7 @@ LIBS=$ac_check_lib_save_LIBS
 fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_pthread___pthread_create_system" >&5
 $as_echo "$ac_cv_lib_pthread___pthread_create_system" >&6; }
-if test "x$ac_cv_lib_pthread___pthread_create_system" = xyes; then :
+if test "x$ac_cv_lib_pthread___pthread_create_system" = x""yes; then :
   $as_echo "#define WITH_THREAD 1" >>confdefs.h
 
     posix_threads=yes
@@ -8700,7 +8692,7 @@ else
 
     { $as_echo "$as_me:${as_lineno-$LINENO}: checking for pthread_create in -lcma" >&5
 $as_echo_n "checking for pthread_create in -lcma... " >&6; }
-if ${ac_cv_lib_cma_pthread_create+:} false; then :
+if test "${ac_cv_lib_cma_pthread_create+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   ac_check_lib_save_LIBS=$LIBS
@@ -8734,7 +8726,7 @@ LIBS=$ac_check_lib_save_LIBS
 fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_cma_pthread_create" >&5
 $as_echo "$ac_cv_lib_cma_pthread_create" >&6; }
-if test "x$ac_cv_lib_cma_pthread_create" = xyes; then :
+if test "x$ac_cv_lib_cma_pthread_create" = x""yes; then :
   $as_echo "#define WITH_THREAD 1" >>confdefs.h
 
     posix_threads=yes
@@ -8766,7 +8758,7 @@ fi
 
     { $as_echo "$as_me:${as_lineno-$LINENO}: checking for usconfig in -lmpc" >&5
 $as_echo_n "checking for usconfig in -lmpc... " >&6; }
-if ${ac_cv_lib_mpc_usconfig+:} false; then :
+if test "${ac_cv_lib_mpc_usconfig+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   ac_check_lib_save_LIBS=$LIBS
@@ -8800,7 +8792,7 @@ LIBS=$ac_check_lib_save_LIBS
 fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_mpc_usconfig" >&5
 $as_echo "$ac_cv_lib_mpc_usconfig" >&6; }
-if test "x$ac_cv_lib_mpc_usconfig" = xyes; then :
+if test "x$ac_cv_lib_mpc_usconfig" = x""yes; then :
   $as_echo "#define WITH_THREAD 1" >>confdefs.h
 
     LIBS="$LIBS -lmpc"
@@ -8812,7 +8804,7 @@ fi
     if test "$posix_threads" != "yes"; then
       { $as_echo "$as_me:${as_lineno-$LINENO}: checking for thr_create in -lthread" >&5
 $as_echo_n "checking for thr_create in -lthread... " >&6; }
-if ${ac_cv_lib_thread_thr_create+:} false; then :
+if test "${ac_cv_lib_thread_thr_create+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   ac_check_lib_save_LIBS=$LIBS
@@ -8846,7 +8838,7 @@ LIBS=$ac_check_lib_save_LIBS
 fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_thread_thr_create" >&5
 $as_echo "$ac_cv_lib_thread_thr_create" >&6; }
-if test "x$ac_cv_lib_thread_thr_create" = xyes; then :
+if test "x$ac_cv_lib_thread_thr_create" = x""yes; then :
   $as_echo "#define WITH_THREAD 1" >>confdefs.h
 
       LIBS="$LIBS -lthread"
@@ -8891,7 +8883,7 @@ $as_echo "#define HAVE_BROKEN_POSIX_SEMAPHORES 1" >>confdefs.h
 
       { $as_echo "$as_me:${as_lineno-$LINENO}: checking if PTHREAD_SCOPE_SYSTEM is supported" >&5
 $as_echo_n "checking if PTHREAD_SCOPE_SYSTEM is supported... " >&6; }
-      if ${ac_cv_pthread_system_supported+:} false; then :
+      if test "${ac_cv_pthread_system_supported+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if test "$cross_compiling" = yes; then :
@@ -8934,7 +8926,7 @@ $as_echo "#define PTHREAD_SYSTEM_SCHED_SUPPORTED 1" >>confdefs.h
       for ac_func in pthread_sigmask
 do :
   ac_fn_c_check_func "$LINENO" "pthread_sigmask" "ac_cv_func_pthread_sigmask"
-if test "x$ac_cv_func_pthread_sigmask" = xyes; then :
+if test "x$ac_cv_func_pthread_sigmask" = x""yes; then :
   cat >>confdefs.h <<_ACEOF
 #define HAVE_PTHREAD_SIGMASK 1
 _ACEOF
@@ -9326,7 +9318,7 @@ fi
 $as_echo "$with_valgrind" >&6; }
 if test "$with_valgrind" != no; then
     ac_fn_c_check_header_mongrel "$LINENO" "valgrind/valgrind.h" "ac_cv_header_valgrind_valgrind_h" "$ac_includes_default"
-if test "x$ac_cv_header_valgrind_valgrind_h" = xyes; then :
+if test "x$ac_cv_header_valgrind_valgrind_h" = x""yes; then :
 
 $as_echo "#define WITH_VALGRIND 1" >>confdefs.h
 
@@ -9348,7 +9340,7 @@ DLINCLDIR=.
 for ac_func in dlopen
 do :
   ac_fn_c_check_func "$LINENO" "dlopen" "ac_cv_func_dlopen"
-if test "x$ac_cv_func_dlopen" = xyes; then :
+if test "x$ac_cv_func_dlopen" = x""yes; then :
   cat >>confdefs.h <<_ACEOF
 #define HAVE_DLOPEN 1
 _ACEOF
@@ -9675,7 +9667,7 @@ rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for flock declaration" >&5
 $as_echo_n "checking for flock declaration... " >&6; }
-if ${ac_cv_flock_decl+:} false; then :
+if test "${ac_cv_flock_decl+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
@@ -9705,7 +9697,7 @@ if test "x${ac_cv_flock_decl}" = xyes; then
   for ac_func in flock
 do :
   ac_fn_c_check_func "$LINENO" "flock" "ac_cv_func_flock"
-if test "x$ac_cv_func_flock" = xyes; then :
+if test "x$ac_cv_func_flock" = x""yes; then :
   cat >>confdefs.h <<_ACEOF
 #define HAVE_FLOCK 1
 _ACEOF
@@ -9713,7 +9705,7 @@ _ACEOF
 else
   { $as_echo "$as_me:${as_lineno-$LINENO}: checking for flock in -lbsd" >&5
 $as_echo_n "checking for flock in -lbsd... " >&6; }
-if ${ac_cv_lib_bsd_flock+:} false; then :
+if test "${ac_cv_lib_bsd_flock+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   ac_check_lib_save_LIBS=$LIBS
@@ -9747,7 +9739,7 @@ LIBS=$ac_check_lib_save_LIBS
 fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_bsd_flock" >&5
 $as_echo "$ac_cv_lib_bsd_flock" >&6; }
-if test "x$ac_cv_lib_bsd_flock" = xyes; then :
+if test "x$ac_cv_lib_bsd_flock" = x""yes; then :
   $as_echo "#define HAVE_FLOCK 1" >>confdefs.h
 
 
@@ -9790,13 +9782,41 @@ $as_echo "no" >&6; }
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
 
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for broken unsetenv" >&5
+$as_echo_n "checking for broken unsetenv... " >&6; }
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <stdlib.h>
+
+int
+main ()
+{
+int res = unsetenv("DUMMY")
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+else
+
+$as_echo "#define HAVE_BROKEN_UNSETENV 1" >>confdefs.h
+
+   { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+
 for ac_prog in true
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_TRUE+:} false; then :
+if test "${ac_cv_prog_TRUE+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if test -n "$TRUE"; then
@@ -9836,7 +9856,7 @@ test -n "$TRUE" || TRUE="/bin/true"
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for inet_aton in -lc" >&5
 $as_echo_n "checking for inet_aton in -lc... " >&6; }
-if ${ac_cv_lib_c_inet_aton+:} false; then :
+if test "${ac_cv_lib_c_inet_aton+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   ac_check_lib_save_LIBS=$LIBS
@@ -9870,12 +9890,12 @@ LIBS=$ac_check_lib_save_LIBS
 fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_c_inet_aton" >&5
 $as_echo "$ac_cv_lib_c_inet_aton" >&6; }
-if test "x$ac_cv_lib_c_inet_aton" = xyes; then :
+if test "x$ac_cv_lib_c_inet_aton" = x""yes; then :
   $ac_cv_prog_TRUE
 else
   { $as_echo "$as_me:${as_lineno-$LINENO}: checking for inet_aton in -lresolv" >&5
 $as_echo_n "checking for inet_aton in -lresolv... " >&6; }
-if ${ac_cv_lib_resolv_inet_aton+:} false; then :
+if test "${ac_cv_lib_resolv_inet_aton+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   ac_check_lib_save_LIBS=$LIBS
@@ -9909,7 +9929,7 @@ LIBS=$ac_check_lib_save_LIBS
 fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_resolv_inet_aton" >&5
 $as_echo "$ac_cv_lib_resolv_inet_aton" >&6; }
-if test "x$ac_cv_lib_resolv_inet_aton" = xyes; then :
+if test "x$ac_cv_lib_resolv_inet_aton" = x""yes; then :
   cat >>confdefs.h <<_ACEOF
 #define HAVE_LIBRESOLV 1
 _ACEOF
@@ -9926,7 +9946,7 @@ fi
 # exit Python
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for chflags" >&5
 $as_echo_n "checking for chflags... " >&6; }
-if ${ac_cv_have_chflags+:} false; then :
+if test "${ac_cv_have_chflags+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if test "$cross_compiling" = yes; then :
@@ -9960,7 +9980,7 @@ fi
 $as_echo "$ac_cv_have_chflags" >&6; }
 if test "$ac_cv_have_chflags" = cross ; then
   ac_fn_c_check_func "$LINENO" "chflags" "ac_cv_func_chflags"
-if test "x$ac_cv_func_chflags" = xyes; then :
+if test "x$ac_cv_func_chflags" = x""yes; then :
   ac_cv_have_chflags="yes"
 else
   ac_cv_have_chflags="no"
@@ -9975,7 +9995,7 @@ fi
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for lchflags" >&5
 $as_echo_n "checking for lchflags... " >&6; }
-if ${ac_cv_have_lchflags+:} false; then :
+if test "${ac_cv_have_lchflags+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if test "$cross_compiling" = yes; then :
@@ -10009,7 +10029,7 @@ fi
 $as_echo "$ac_cv_have_lchflags" >&6; }
 if test "$ac_cv_have_lchflags" = cross ; then
   ac_fn_c_check_func "$LINENO" "lchflags" "ac_cv_func_lchflags"
-if test "x$ac_cv_func_lchflags" = xyes; then :
+if test "x$ac_cv_func_lchflags" = x""yes; then :
   ac_cv_have_lchflags="yes"
 else
   ac_cv_have_lchflags="no"
@@ -10033,7 +10053,7 @@ esac
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for inflateCopy in -lz" >&5
 $as_echo_n "checking for inflateCopy in -lz... " >&6; }
-if ${ac_cv_lib_z_inflateCopy+:} false; then :
+if test "${ac_cv_lib_z_inflateCopy+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   ac_check_lib_save_LIBS=$LIBS
@@ -10067,7 +10087,7 @@ LIBS=$ac_check_lib_save_LIBS
 fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_z_inflateCopy" >&5
 $as_echo "$ac_cv_lib_z_inflateCopy" >&6; }
-if test "x$ac_cv_lib_z_inflateCopy" = xyes; then :
+if test "x$ac_cv_lib_z_inflateCopy" = x""yes; then :
 
 $as_echo "#define HAVE_ZLIB_COPY 1" >>confdefs.h
 
@@ -10210,7 +10230,7 @@ rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
 for ac_func in openpty
 do :
   ac_fn_c_check_func "$LINENO" "openpty" "ac_cv_func_openpty"
-if test "x$ac_cv_func_openpty" = xyes; then :
+if test "x$ac_cv_func_openpty" = x""yes; then :
   cat >>confdefs.h <<_ACEOF
 #define HAVE_OPENPTY 1
 _ACEOF
@@ -10218,7 +10238,7 @@ _ACEOF
 else
   { $as_echo "$as_me:${as_lineno-$LINENO}: checking for openpty in -lutil" >&5
 $as_echo_n "checking for openpty in -lutil... " >&6; }
-if ${ac_cv_lib_util_openpty+:} false; then :
+if test "${ac_cv_lib_util_openpty+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   ac_check_lib_save_LIBS=$LIBS
@@ -10252,13 +10272,13 @@ LIBS=$ac_check_lib_save_LIBS
 fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_util_openpty" >&5
 $as_echo "$ac_cv_lib_util_openpty" >&6; }
-if test "x$ac_cv_lib_util_openpty" = xyes; then :
+if test "x$ac_cv_lib_util_openpty" = x""yes; then :
   $as_echo "#define HAVE_OPENPTY 1" >>confdefs.h
  LIBS="$LIBS -lutil"
 else
   { $as_echo "$as_me:${as_lineno-$LINENO}: checking for openpty in -lbsd" >&5
 $as_echo_n "checking for openpty in -lbsd... " >&6; }
-if ${ac_cv_lib_bsd_openpty+:} false; then :
+if test "${ac_cv_lib_bsd_openpty+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   ac_check_lib_save_LIBS=$LIBS
@@ -10292,7 +10312,7 @@ LIBS=$ac_check_lib_save_LIBS
 fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_bsd_openpty" >&5
 $as_echo "$ac_cv_lib_bsd_openpty" >&6; }
-if test "x$ac_cv_lib_bsd_openpty" = xyes; then :
+if test "x$ac_cv_lib_bsd_openpty" = x""yes; then :
   $as_echo "#define HAVE_OPENPTY 1" >>confdefs.h
  LIBS="$LIBS -lbsd"
 fi
@@ -10307,7 +10327,7 @@ done
 for ac_func in forkpty
 do :
   ac_fn_c_check_func "$LINENO" "forkpty" "ac_cv_func_forkpty"
-if test "x$ac_cv_func_forkpty" = xyes; then :
+if test "x$ac_cv_func_forkpty" = x""yes; then :
   cat >>confdefs.h <<_ACEOF
 #define HAVE_FORKPTY 1
 _ACEOF
@@ -10315,7 +10335,7 @@ _ACEOF
 else
   { $as_echo "$as_me:${as_lineno-$LINENO}: checking for forkpty in -lutil" >&5
 $as_echo_n "checking for forkpty in -lutil... " >&6; }
-if ${ac_cv_lib_util_forkpty+:} false; then :
+if test "${ac_cv_lib_util_forkpty+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   ac_check_lib_save_LIBS=$LIBS
@@ -10349,13 +10369,13 @@ LIBS=$ac_check_lib_save_LIBS
 fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_util_forkpty" >&5
 $as_echo "$ac_cv_lib_util_forkpty" >&6; }
-if test "x$ac_cv_lib_util_forkpty" = xyes; then :
+if test "x$ac_cv_lib_util_forkpty" = x""yes; then :
   $as_echo "#define HAVE_FORKPTY 1" >>confdefs.h
  LIBS="$LIBS -lutil"
 else
   { $as_echo "$as_me:${as_lineno-$LINENO}: checking for forkpty in -lbsd" >&5
 $as_echo_n "checking for forkpty in -lbsd... " >&6; }
-if ${ac_cv_lib_bsd_forkpty+:} false; then :
+if test "${ac_cv_lib_bsd_forkpty+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   ac_check_lib_save_LIBS=$LIBS
@@ -10389,7 +10409,7 @@ LIBS=$ac_check_lib_save_LIBS
 fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_bsd_forkpty" >&5
 $as_echo "$ac_cv_lib_bsd_forkpty" >&6; }
-if test "x$ac_cv_lib_bsd_forkpty" = xyes; then :
+if test "x$ac_cv_lib_bsd_forkpty" = x""yes; then :
   $as_echo "#define HAVE_FORKPTY 1" >>confdefs.h
  LIBS="$LIBS -lbsd"
 fi
@@ -10406,7 +10426,7 @@ done
 for ac_func in memmove
 do :
   ac_fn_c_check_func "$LINENO" "memmove" "ac_cv_func_memmove"
-if test "x$ac_cv_func_memmove" = xyes; then :
+if test "x$ac_cv_func_memmove" = x""yes; then :
   cat >>confdefs.h <<_ACEOF
 #define HAVE_MEMMOVE 1
 _ACEOF
@@ -10430,7 +10450,7 @@ done
 
 
 ac_fn_c_check_func "$LINENO" "dup2" "ac_cv_func_dup2"
-if test "x$ac_cv_func_dup2" = xyes; then :
+if test "x$ac_cv_func_dup2" = x""yes; then :
   $as_echo "#define HAVE_DUP2 1" >>confdefs.h
 
 else
@@ -10443,7 +10463,7 @@ esac
 fi
 
 ac_fn_c_check_func "$LINENO" "getcwd" "ac_cv_func_getcwd"
-if test "x$ac_cv_func_getcwd" = xyes; then :
+if test "x$ac_cv_func_getcwd" = x""yes; then :
   $as_echo "#define HAVE_GETCWD 1" >>confdefs.h
 
 else
@@ -10456,7 +10476,7 @@ esac
 fi
 
 ac_fn_c_check_func "$LINENO" "strdup" "ac_cv_func_strdup"
-if test "x$ac_cv_func_strdup" = xyes; then :
+if test "x$ac_cv_func_strdup" = x""yes; then :
   $as_echo "#define HAVE_STRDUP 1" >>confdefs.h
 
 else
@@ -10472,7 +10492,7 @@ fi
 for ac_func in getpgrp
 do :
   ac_fn_c_check_func "$LINENO" "getpgrp" "ac_cv_func_getpgrp"
-if test "x$ac_cv_func_getpgrp" = xyes; then :
+if test "x$ac_cv_func_getpgrp" = x""yes; then :
   cat >>confdefs.h <<_ACEOF
 #define HAVE_GETPGRP 1
 _ACEOF
@@ -10500,7 +10520,7 @@ done
 for ac_func in setpgrp
 do :
   ac_fn_c_check_func "$LINENO" "setpgrp" "ac_cv_func_setpgrp"
-if test "x$ac_cv_func_setpgrp" = xyes; then :
+if test "x$ac_cv_func_setpgrp" = x""yes; then :
   cat >>confdefs.h <<_ACEOF
 #define HAVE_SETPGRP 1
 _ACEOF
@@ -10528,7 +10548,7 @@ done
 for ac_func in gettimeofday
 do :
   ac_fn_c_check_func "$LINENO" "gettimeofday" "ac_cv_func_gettimeofday"
-if test "x$ac_cv_func_gettimeofday" = xyes; then :
+if test "x$ac_cv_func_gettimeofday" = x""yes; then :
   cat >>confdefs.h <<_ACEOF
 #define HAVE_GETTIMEOFDAY 1
 _ACEOF
@@ -10630,7 +10650,7 @@ if test $have_getaddrinfo = yes
 then
   { $as_echo "$as_me:${as_lineno-$LINENO}: checking getaddrinfo bug" >&5
 $as_echo_n "checking getaddrinfo bug... " >&6; }
-  if ${ac_cv_buggy_getaddrinfo+:} false; then :
+  if test "${ac_cv_buggy_getaddrinfo+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if test "$cross_compiling" = yes; then :
@@ -10759,7 +10779,7 @@ fi
 for ac_func in getnameinfo
 do :
   ac_fn_c_check_func "$LINENO" "getnameinfo" "ac_cv_func_getnameinfo"
-if test "x$ac_cv_func_getnameinfo" = xyes; then :
+if test "x$ac_cv_func_getnameinfo" = x""yes; then :
   cat >>confdefs.h <<_ACEOF
 #define HAVE_GETNAMEINFO 1
 _ACEOF
@@ -10771,7 +10791,7 @@ done
 # checks for structures
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether time.h and sys/time.h may both be included" >&5
 $as_echo_n "checking whether time.h and sys/time.h may both be included... " >&6; }
-if ${ac_cv_header_time+:} false; then :
+if test "${ac_cv_header_time+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
@@ -10806,7 +10826,7 @@ fi
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether struct tm is in sys/time.h or time.h" >&5
 $as_echo_n "checking whether struct tm is in sys/time.h or time.h... " >&6; }
-if ${ac_cv_struct_tm+:} false; then :
+if test "${ac_cv_struct_tm+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
@@ -10843,7 +10863,7 @@ ac_fn_c_check_member "$LINENO" "struct tm" "tm_zone" "ac_cv_member_struct_tm_tm_
 #include <$ac_cv_struct_tm>
 
 "
-if test "x$ac_cv_member_struct_tm_tm_zone" = xyes; then :
+if test "x$ac_cv_member_struct_tm_tm_zone" = x""yes; then :
 
 cat >>confdefs.h <<_ACEOF
 #define HAVE_STRUCT_TM_TM_ZONE 1
@@ -10859,7 +10879,7 @@ $as_echo "#define HAVE_TM_ZONE 1" >>confdefs.h
 else
   ac_fn_c_check_decl "$LINENO" "tzname" "ac_cv_have_decl_tzname" "#include <time.h>
 "
-if test "x$ac_cv_have_decl_tzname" = xyes; then :
+if test "x$ac_cv_have_decl_tzname" = x""yes; then :
   ac_have_decl=1
 else
   ac_have_decl=0
@@ -10871,7 +10891,7 @@ _ACEOF
 
   { $as_echo "$as_me:${as_lineno-$LINENO}: checking for tzname" >&5
 $as_echo_n "checking for tzname... " >&6; }
-if ${ac_cv_var_tzname+:} false; then :
+if test "${ac_cv_var_tzname+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
@@ -10907,7 +10927,7 @@ $as_echo "#define HAVE_TZNAME 1" >>confdefs.h
 fi
 
 ac_fn_c_check_member "$LINENO" "struct stat" "st_rdev" "ac_cv_member_struct_stat_st_rdev" "$ac_includes_default"
-if test "x$ac_cv_member_struct_stat_st_rdev" = xyes; then :
+if test "x$ac_cv_member_struct_stat_st_rdev" = x""yes; then :
 
 cat >>confdefs.h <<_ACEOF
 #define HAVE_STRUCT_STAT_ST_RDEV 1
@@ -10917,7 +10937,7 @@ _ACEOF
 fi
 
 ac_fn_c_check_member "$LINENO" "struct stat" "st_blksize" "ac_cv_member_struct_stat_st_blksize" "$ac_includes_default"
-if test "x$ac_cv_member_struct_stat_st_blksize" = xyes; then :
+if test "x$ac_cv_member_struct_stat_st_blksize" = x""yes; then :
 
 cat >>confdefs.h <<_ACEOF
 #define HAVE_STRUCT_STAT_ST_BLKSIZE 1
@@ -10927,7 +10947,7 @@ _ACEOF
 fi
 
 ac_fn_c_check_member "$LINENO" "struct stat" "st_flags" "ac_cv_member_struct_stat_st_flags" "$ac_includes_default"
-if test "x$ac_cv_member_struct_stat_st_flags" = xyes; then :
+if test "x$ac_cv_member_struct_stat_st_flags" = x""yes; then :
 
 cat >>confdefs.h <<_ACEOF
 #define HAVE_STRUCT_STAT_ST_FLAGS 1
@@ -10937,7 +10957,7 @@ _ACEOF
 fi
 
 ac_fn_c_check_member "$LINENO" "struct stat" "st_gen" "ac_cv_member_struct_stat_st_gen" "$ac_includes_default"
-if test "x$ac_cv_member_struct_stat_st_gen" = xyes; then :
+if test "x$ac_cv_member_struct_stat_st_gen" = x""yes; then :
 
 cat >>confdefs.h <<_ACEOF
 #define HAVE_STRUCT_STAT_ST_GEN 1
@@ -10947,7 +10967,7 @@ _ACEOF
 fi
 
 ac_fn_c_check_member "$LINENO" "struct stat" "st_birthtime" "ac_cv_member_struct_stat_st_birthtime" "$ac_includes_default"
-if test "x$ac_cv_member_struct_stat_st_birthtime" = xyes; then :
+if test "x$ac_cv_member_struct_stat_st_birthtime" = x""yes; then :
 
 cat >>confdefs.h <<_ACEOF
 #define HAVE_STRUCT_STAT_ST_BIRTHTIME 1
@@ -10957,7 +10977,7 @@ _ACEOF
 fi
 
 ac_fn_c_check_member "$LINENO" "struct stat" "st_blocks" "ac_cv_member_struct_stat_st_blocks" "$ac_includes_default"
-if test "x$ac_cv_member_struct_stat_st_blocks" = xyes; then :
+if test "x$ac_cv_member_struct_stat_st_blocks" = x""yes; then :
 
 cat >>confdefs.h <<_ACEOF
 #define HAVE_STRUCT_STAT_ST_BLOCKS 1
@@ -10979,7 +10999,7 @@ fi
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for time.h that defines altzone" >&5
 $as_echo_n "checking for time.h that defines altzone... " >&6; }
-if ${ac_cv_header_time_altzone+:} false; then :
+if test "${ac_cv_header_time_altzone+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
 
@@ -11043,7 +11063,7 @@ $as_echo "$was_it_defined" >&6; }
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for addrinfo" >&5
 $as_echo_n "checking for addrinfo... " >&6; }
-if ${ac_cv_struct_addrinfo+:} false; then :
+if test "${ac_cv_struct_addrinfo+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
@@ -11075,7 +11095,7 @@ fi
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for sockaddr_storage" >&5
 $as_echo_n "checking for sockaddr_storage... " >&6; }
-if ${ac_cv_struct_sockaddr_storage+:} false; then :
+if test "${ac_cv_struct_sockaddr_storage+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
@@ -11111,7 +11131,7 @@ fi
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether char is unsigned" >&5
 $as_echo_n "checking whether char is unsigned... " >&6; }
-if ${ac_cv_c_char_unsigned+:} false; then :
+if test "${ac_cv_c_char_unsigned+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
@@ -11143,7 +11163,7 @@ fi
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for an ANSI C-conforming const" >&5
 $as_echo_n "checking for an ANSI C-conforming const... " >&6; }
-if ${ac_cv_c_const+:} false; then :
+if test "${ac_cv_c_const+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
@@ -11431,7 +11451,7 @@ $as_echo "$va_list_is_array" >&6; }
 
 
 ac_fn_c_check_func "$LINENO" "gethostbyname_r" "ac_cv_func_gethostbyname_r"
-if test "x$ac_cv_func_gethostbyname_r" = xyes; then :
+if test "x$ac_cv_func_gethostbyname_r" = x""yes; then :
 
   $as_echo "#define HAVE_GETHOSTBYNAME_R 1" >>confdefs.h
 
@@ -11562,7 +11582,7 @@ else
   for ac_func in gethostbyname
 do :
   ac_fn_c_check_func "$LINENO" "gethostbyname" "ac_cv_func_gethostbyname"
-if test "x$ac_cv_func_gethostbyname" = xyes; then :
+if test "x$ac_cv_func_gethostbyname" = x""yes; then :
   cat >>confdefs.h <<_ACEOF
 #define HAVE_GETHOSTBYNAME 1
 _ACEOF
@@ -11584,12 +11604,12 @@ fi
 
 # Linux requires this for correct f.p. operations
 ac_fn_c_check_func "$LINENO" "__fpu_control" "ac_cv_func___fpu_control"
-if test "x$ac_cv_func___fpu_control" = xyes; then :
+if test "x$ac_cv_func___fpu_control" = x""yes; then :
 
 else
   { $as_echo "$as_me:${as_lineno-$LINENO}: checking for __fpu_control in -lieee" >&5
 $as_echo_n "checking for __fpu_control in -lieee... " >&6; }
-if ${ac_cv_lib_ieee___fpu_control+:} false; then :
+if test "${ac_cv_lib_ieee___fpu_control+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   ac_check_lib_save_LIBS=$LIBS
@@ -11623,7 +11643,7 @@ LIBS=$ac_check_lib_save_LIBS
 fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_ieee___fpu_control" >&5
 $as_echo "$ac_cv_lib_ieee___fpu_control" >&6; }
-if test "x$ac_cv_lib_ieee___fpu_control" = xyes; then :
+if test "x$ac_cv_lib_ieee___fpu_control" = x""yes; then :
   cat >>confdefs.h <<_ACEOF
 #define HAVE_LIBIEEE 1
 _ACEOF
@@ -11717,7 +11737,7 @@ fi
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether C doubles are little-endian IEEE 754 binary64" >&5
 $as_echo_n "checking whether C doubles are little-endian IEEE 754 binary64... " >&6; }
-if ${ac_cv_little_endian_double+:} false; then :
+if test "${ac_cv_little_endian_double+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
 
@@ -11759,7 +11779,7 @@ fi
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether C doubles are big-endian IEEE 754 binary64" >&5
 $as_echo_n "checking whether C doubles are big-endian IEEE 754 binary64... " >&6; }
-if ${ac_cv_big_endian_double+:} false; then :
+if test "${ac_cv_big_endian_double+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
 
@@ -11805,7 +11825,7 @@ fi
 # conversions work.
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether C doubles are ARM mixed-endian IEEE 754 binary64" >&5
 $as_echo_n "checking whether C doubles are ARM mixed-endian IEEE 754 binary64... " >&6; }
-if ${ac_cv_mixed_endian_double+:} false; then :
+if test "${ac_cv_mixed_endian_double+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
 
@@ -11975,7 +11995,7 @@ done
 
 ac_fn_c_check_decl "$LINENO" "isinf" "ac_cv_have_decl_isinf" "#include <math.h>
 "
-if test "x$ac_cv_have_decl_isinf" = xyes; then :
+if test "x$ac_cv_have_decl_isinf" = x""yes; then :
   ac_have_decl=1
 else
   ac_have_decl=0
@@ -11986,7 +12006,7 @@ cat >>confdefs.h <<_ACEOF
 _ACEOF
 ac_fn_c_check_decl "$LINENO" "isnan" "ac_cv_have_decl_isnan" "#include <math.h>
 "
-if test "x$ac_cv_have_decl_isnan" = xyes; then :
+if test "x$ac_cv_have_decl_isnan" = x""yes; then :
   ac_have_decl=1
 else
   ac_have_decl=0
@@ -11997,7 +12017,7 @@ cat >>confdefs.h <<_ACEOF
 _ACEOF
 ac_fn_c_check_decl "$LINENO" "isfinite" "ac_cv_have_decl_isfinite" "#include <math.h>
 "
-if test "x$ac_cv_have_decl_isfinite" = xyes; then :
+if test "x$ac_cv_have_decl_isfinite" = x""yes; then :
   ac_have_decl=1
 else
   ac_have_decl=0
@@ -12012,7 +12032,7 @@ _ACEOF
 # -0. on some architectures.
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether tanh preserves the sign of zero" >&5
 $as_echo_n "checking whether tanh preserves the sign of zero... " >&6; }
-if ${ac_cv_tanh_preserves_zero_sign+:} false; then :
+if test "${ac_cv_tanh_preserves_zero_sign+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
 
@@ -12060,7 +12080,7 @@ then
     # -0.  See issue #9920.
     { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether log1p drops the sign of negative zero" >&5
 $as_echo_n "checking whether log1p drops the sign of negative zero... " >&6; }
-    if ${ac_cv_log1p_drops_zero_sign+:} false; then :
+    if test "${ac_cv_log1p_drops_zero_sign+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
 
@@ -12112,7 +12132,7 @@ LIBS=$LIBS_SAVE
 # sem_open results in a 'Signal 12' error.
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether POSIX semaphores are enabled" >&5
 $as_echo_n "checking whether POSIX semaphores are enabled... " >&6; }
-if ${ac_cv_posix_semaphores_enabled+:} false; then :
+if test "${ac_cv_posix_semaphores_enabled+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if test "$cross_compiling" = yes; then :
@@ -12163,7 +12183,7 @@ fi
 # Multiprocessing check for broken sem_getvalue
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for broken sem_getvalue" >&5
 $as_echo_n "checking for broken sem_getvalue... " >&6; }
-if ${ac_cv_broken_sem_getvalue+:} false; then :
+if test "${ac_cv_broken_sem_getvalue+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if test "$cross_compiling" = yes; then :
@@ -12228,7 +12248,7 @@ no)
 15|30)
   ;;
 *)
-  as_fn_error $? "bad value $enable_big_digits for --enable-big-digits; value should be 15 or 30" "$LINENO" 5 ;;
+  as_fn_error $? "bad value $enable_big_digits for --enable-big-digits; value should be 15 or 30" "$LINENO" 5  ;;
 esac
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $enable_big_digits" >&5
 $as_echo "$enable_big_digits" >&6; }
@@ -12246,7 +12266,7 @@ fi
 
 # check for wchar.h
 ac_fn_c_check_header_mongrel "$LINENO" "wchar.h" "ac_cv_header_wchar_h" "$ac_includes_default"
-if test "x$ac_cv_header_wchar_h" = xyes; then :
+if test "x$ac_cv_header_wchar_h" = x""yes; then :
 
 
 $as_echo "#define HAVE_WCHAR_H 1" >>confdefs.h
@@ -12269,7 +12289,7 @@ then
 # This bug is HP SR number 8606223364.
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking size of wchar_t" >&5
 $as_echo_n "checking size of wchar_t... " >&6; }
-if ${ac_cv_sizeof_wchar_t+:} false; then :
+if test "${ac_cv_sizeof_wchar_t+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if ac_fn_c_compute_int "$LINENO" "(long int) (sizeof (wchar_t))" "ac_cv_sizeof_wchar_t"        "#include <wchar.h>
@@ -12280,7 +12300,7 @@ else
      { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
 $as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
 as_fn_error 77 "cannot compute sizeof (wchar_t)
-See \`config.log' for more details" "$LINENO" 5; }
+See \`config.log' for more details" "$LINENO" 5 ; }
    else
      ac_cv_sizeof_wchar_t=0
    fi
@@ -12335,7 +12355,7 @@ then
   # check whether wchar_t is signed or not
   { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether wchar_t is signed" >&5
 $as_echo_n "checking whether wchar_t is signed... " >&6; }
-  if ${ac_cv_wchar_t_signed+:} false; then :
+  if test "${ac_cv_wchar_t_signed+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
 
@@ -12431,7 +12451,7 @@ $as_echo "$PY_UNICODE_TYPE" >&6; }
 # check for endianness
  { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether byte ordering is bigendian" >&5
 $as_echo_n "checking whether byte ordering is bigendian... " >&6; }
-if ${ac_cv_c_bigendian+:} false; then :
+if test "${ac_cv_c_bigendian+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   ac_cv_c_bigendian=unknown
@@ -12650,7 +12670,7 @@ $as_echo "#define AC_APPLE_UNIVERSAL_BUILD 1" >>confdefs.h
      ;; #(
    *)
      as_fn_error $? "unknown endianness
- presetting ac_cv_c_bigendian=no (or yes) will help" "$LINENO" 5 ;;
+ presetting ac_cv_c_bigendian=no (or yes) will help" "$LINENO" 5  ;;
  esac
 
 
@@ -12722,7 +12742,7 @@ $as_echo "$SO" >&6; }
 # or fills with zeros (like the Cray J90, according to Tim Peters).
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether right shift extends the sign bit" >&5
 $as_echo_n "checking whether right shift extends the sign bit... " >&6; }
-if ${ac_cv_rshift_extends_sign+:} false; then :
+if test "${ac_cv_rshift_extends_sign+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
 
@@ -12761,7 +12781,7 @@ fi
 # check for getc_unlocked and related locking functions
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for getc_unlocked() and friends" >&5
 $as_echo_n "checking for getc_unlocked() and friends... " >&6; }
-if ${ac_cv_have_getc_unlocked+:} false; then :
+if test "${ac_cv_have_getc_unlocked+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
 
@@ -12859,7 +12879,7 @@ fi
 # check for readline 2.1
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for rl_callback_handler_install in -lreadline" >&5
 $as_echo_n "checking for rl_callback_handler_install in -lreadline... " >&6; }
-if ${ac_cv_lib_readline_rl_callback_handler_install+:} false; then :
+if test "${ac_cv_lib_readline_rl_callback_handler_install+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   ac_check_lib_save_LIBS=$LIBS
@@ -12893,7 +12913,7 @@ LIBS=$ac_check_lib_save_LIBS
 fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_readline_rl_callback_handler_install" >&5
 $as_echo "$ac_cv_lib_readline_rl_callback_handler_install" >&6; }
-if test "x$ac_cv_lib_readline_rl_callback_handler_install" = xyes; then :
+if test "x$ac_cv_lib_readline_rl_callback_handler_install" = x""yes; then :
 
 $as_echo "#define HAVE_RL_CALLBACK 1" >>confdefs.h
 
@@ -12945,7 +12965,7 @@ fi
 # check for readline 4.0
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for rl_pre_input_hook in -lreadline" >&5
 $as_echo_n "checking for rl_pre_input_hook in -lreadline... " >&6; }
-if ${ac_cv_lib_readline_rl_pre_input_hook+:} false; then :
+if test "${ac_cv_lib_readline_rl_pre_input_hook+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   ac_check_lib_save_LIBS=$LIBS
@@ -12979,7 +12999,7 @@ LIBS=$ac_check_lib_save_LIBS
 fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_readline_rl_pre_input_hook" >&5
 $as_echo "$ac_cv_lib_readline_rl_pre_input_hook" >&6; }
-if test "x$ac_cv_lib_readline_rl_pre_input_hook" = xyes; then :
+if test "x$ac_cv_lib_readline_rl_pre_input_hook" = x""yes; then :
 
 $as_echo "#define HAVE_RL_PRE_INPUT_HOOK 1" >>confdefs.h
 
@@ -12989,7 +13009,7 @@ fi
 # also in 4.0
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for rl_completion_display_matches_hook in -lreadline" >&5
 $as_echo_n "checking for rl_completion_display_matches_hook in -lreadline... " >&6; }
-if ${ac_cv_lib_readline_rl_completion_display_matches_hook+:} false; then :
+if test "${ac_cv_lib_readline_rl_completion_display_matches_hook+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   ac_check_lib_save_LIBS=$LIBS
@@ -13023,7 +13043,7 @@ LIBS=$ac_check_lib_save_LIBS
 fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_readline_rl_completion_display_matches_hook" >&5
 $as_echo "$ac_cv_lib_readline_rl_completion_display_matches_hook" >&6; }
-if test "x$ac_cv_lib_readline_rl_completion_display_matches_hook" = xyes; then :
+if test "x$ac_cv_lib_readline_rl_completion_display_matches_hook" = x""yes; then :
 
 $as_echo "#define HAVE_RL_COMPLETION_DISPLAY_MATCHES_HOOK 1" >>confdefs.h
 
@@ -13033,7 +13053,7 @@ fi
 # check for readline 4.2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for rl_completion_matches in -lreadline" >&5
 $as_echo_n "checking for rl_completion_matches in -lreadline... " >&6; }
-if ${ac_cv_lib_readline_rl_completion_matches+:} false; then :
+if test "${ac_cv_lib_readline_rl_completion_matches+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   ac_check_lib_save_LIBS=$LIBS
@@ -13067,7 +13087,7 @@ LIBS=$ac_check_lib_save_LIBS
 fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_readline_rl_completion_matches" >&5
 $as_echo "$ac_cv_lib_readline_rl_completion_matches" >&6; }
-if test "x$ac_cv_lib_readline_rl_completion_matches" = xyes; then :
+if test "x$ac_cv_lib_readline_rl_completion_matches" = x""yes; then :
 
 $as_echo "#define HAVE_RL_COMPLETION_MATCHES 1" >>confdefs.h
 
@@ -13108,7 +13128,7 @@ LIBS=$LIBS_no_readline
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for broken nice()" >&5
 $as_echo_n "checking for broken nice()... " >&6; }
-if ${ac_cv_broken_nice+:} false; then :
+if test "${ac_cv_broken_nice+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
 
@@ -13149,7 +13169,7 @@ fi
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for broken poll()" >&5
 $as_echo_n "checking for broken poll()... " >&6; }
-if ${ac_cv_broken_poll+:} false; then :
+if test "${ac_cv_broken_poll+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if test "$cross_compiling" = yes; then :
@@ -13204,7 +13224,7 @@ ac_fn_c_check_member "$LINENO" "struct tm" "tm_zone" "ac_cv_member_struct_tm_tm_
 #include <$ac_cv_struct_tm>
 
 "
-if test "x$ac_cv_member_struct_tm_tm_zone" = xyes; then :
+if test "x$ac_cv_member_struct_tm_tm_zone" = x""yes; then :
 
 cat >>confdefs.h <<_ACEOF
 #define HAVE_STRUCT_TM_TM_ZONE 1
@@ -13220,7 +13240,7 @@ $as_echo "#define HAVE_TM_ZONE 1" >>confdefs.h
 else
   ac_fn_c_check_decl "$LINENO" "tzname" "ac_cv_have_decl_tzname" "#include <time.h>
 "
-if test "x$ac_cv_have_decl_tzname" = xyes; then :
+if test "x$ac_cv_have_decl_tzname" = x""yes; then :
   ac_have_decl=1
 else
   ac_have_decl=0
@@ -13232,7 +13252,7 @@ _ACEOF
 
   { $as_echo "$as_me:${as_lineno-$LINENO}: checking for tzname" >&5
 $as_echo_n "checking for tzname... " >&6; }
-if ${ac_cv_var_tzname+:} false; then :
+if test "${ac_cv_var_tzname+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
@@ -13271,7 +13291,7 @@ fi
 # check tzset(3) exists and works like we expect it to
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for working tzset()" >&5
 $as_echo_n "checking for working tzset()... " >&6; }
-if ${ac_cv_working_tzset+:} false; then :
+if test "${ac_cv_working_tzset+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
 
@@ -13368,7 +13388,7 @@ fi
 # Look for subsecond timestamps in struct stat
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for tv_nsec in struct stat" >&5
 $as_echo_n "checking for tv_nsec in struct stat... " >&6; }
-if ${ac_cv_stat_tv_nsec+:} false; then :
+if test "${ac_cv_stat_tv_nsec+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
@@ -13405,7 +13425,7 @@ fi
 # Look for BSD style subsecond timestamps in struct stat
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for tv_nsec2 in struct stat" >&5
 $as_echo_n "checking for tv_nsec2 in struct stat... " >&6; }
-if ${ac_cv_stat_tv_nsec2+:} false; then :
+if test "${ac_cv_stat_tv_nsec2+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
@@ -13442,7 +13462,7 @@ fi
 # On HP/UX 11.0, mvwdelch is a block with a return statement
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether mvwdelch is an expression" >&5
 $as_echo_n "checking whether mvwdelch is an expression... " >&6; }
-if ${ac_cv_mvwdelch_is_expression+:} false; then :
+if test "${ac_cv_mvwdelch_is_expression+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
@@ -13479,7 +13499,7 @@ fi
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether WINDOW has _flags" >&5
 $as_echo_n "checking whether WINDOW has _flags... " >&6; }
-if ${ac_cv_window_has_flags+:} false; then :
+if test "${ac_cv_window_has_flags+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
@@ -13627,7 +13647,7 @@ if test "$have_long_long" = yes
 then
   { $as_echo "$as_me:${as_lineno-$LINENO}: checking for %lld and %llu printf() format support" >&5
 $as_echo_n "checking for %lld and %llu printf() format support... " >&6; }
-  if ${ac_cv_have_long_long_format+:} false; then :
+  if test "${ac_cv_have_long_long_format+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if test "$cross_compiling" = yes; then :
@@ -13697,7 +13717,7 @@ fi
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for %zd printf() format support" >&5
 $as_echo_n "checking for %zd printf() format support... " >&6; }
-if ${ac_cv_have_size_t_format+:} false; then :
+if test "${ac_cv_have_size_t_format+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if test "$cross_compiling" = yes; then :
@@ -13770,7 +13790,7 @@ ac_fn_c_check_type "$LINENO" "socklen_t" "ac_cv_type_socklen_t" "
 #endif
 
 "
-if test "x$ac_cv_type_socklen_t" = xyes; then :
+if test "x$ac_cv_type_socklen_t" = x""yes; then :
 
 else
 
@@ -13781,7 +13801,7 @@ fi
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for broken mbstowcs" >&5
 $as_echo_n "checking for broken mbstowcs... " >&6; }
-if ${ac_cv_broken_mbstowcs+:} false; then :
+if test "${ac_cv_broken_mbstowcs+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if test "$cross_compiling" = yes; then :
@@ -13821,7 +13841,7 @@ fi
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether $CC supports computed gotos" >&5
 $as_echo_n "checking whether $CC supports computed gotos... " >&6; }
-if ${ac_cv_computed_gotos+:} false; then :
+if test "${ac_cv_computed_gotos+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
   if test "$cross_compiling" = yes; then :
@@ -13901,11 +13921,11 @@ esac
 
 
 case $ac_sys_system in
-  OSF*) as_fn_error $? "OSF* systems are deprecated unless somebody volunteers. Check http://bugs.python.org/issue8606" "$LINENO" 5 ;;
+  OSF*) as_fn_error $? "OSF* systems are deprecated unless somebody volunteers. Check http://bugs.python.org/issue8606" "$LINENO" 5  ;;
 esac
 
 ac_fn_c_check_func "$LINENO" "pipe2" "ac_cv_func_pipe2"
-if test "x$ac_cv_func_pipe2" = xyes; then :
+if test "x$ac_cv_func_pipe2" = x""yes; then :
 
 $as_echo "#define HAVE_PIPE2 1" >>confdefs.h
 
@@ -14000,21 +14020,10 @@ $as_echo "$as_me: WARNING: cache variable $ac_var contains a newline" >&2;} ;;
      :end' >>confcache
 if diff "$cache_file" confcache >/dev/null 2>&1; then :; else
   if test -w "$cache_file"; then
-    if test "x$cache_file" != "x/dev/null"; then
+    test "x$cache_file" != "x/dev/null" &&
       { $as_echo "$as_me:${as_lineno-$LINENO}: updating cache $cache_file" >&5
 $as_echo "$as_me: updating cache $cache_file" >&6;}
-      if test ! -f "$cache_file" || test -h "$cache_file"; then
-	cat confcache >"$cache_file"
-      else
-        case $cache_file in #(
-        */* | ?:*)
-	  mv -f confcache "$cache_file"$$ &&
-	  mv -f "$cache_file"$$ "$cache_file" ;; #(
-        *)
-	  mv -f confcache "$cache_file" ;;
-	esac
-      fi
-    fi
+    cat confcache >$cache_file
   else
     { $as_echo "$as_me:${as_lineno-$LINENO}: not updating unwritable cache $cache_file" >&5
 $as_echo "$as_me: not updating unwritable cache $cache_file" >&6;}
@@ -14047,7 +14056,7 @@ LTLIBOBJS=$ac_ltlibobjs
 
 
 
-: "${CONFIG_STATUS=./config.status}"
+: ${CONFIG_STATUS=./config.status}
 ac_write_fail=0
 ac_clean_files_save=$ac_clean_files
 ac_clean_files="$ac_clean_files $CONFIG_STATUS"
@@ -14148,7 +14157,6 @@ fi
 IFS=" ""	$as_nl"
 
 # Find who we are.  Look in the path if we contain no directory separator.
-as_myself=
 case $0 in #((
   *[\\/]* ) as_myself=$0 ;;
   *) as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
@@ -14456,7 +14464,7 @@ cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
 # values after options handling.
 ac_log="
 This file was extended by python $as_me 3.2, which was
-generated by GNU Autoconf 2.68.  Invocation command line was
+generated by GNU Autoconf 2.67.  Invocation command line was
 
   CONFIG_FILES    = $CONFIG_FILES
   CONFIG_HEADERS  = $CONFIG_HEADERS
@@ -14480,8 +14488,8 @@ esac
 
 cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
 # Files that config.status was made for.
-config_files="`echo $ac_config_files`"
-config_headers="`echo $ac_config_headers`"
+config_files="$ac_config_files"
+config_headers="$ac_config_headers"
 
 _ACEOF
 
@@ -14518,7 +14526,7 @@ cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
 ac_cs_config="`$as_echo "$ac_configure_args" | sed 's/^ //; s/[\\""\`\$]/\\\\&/g'`"
 ac_cs_version="\\
 python config.status 3.2
-configured by $0, generated by GNU Autoconf 2.68,
+configured by $0, generated by GNU Autoconf 2.67,
   with options \\"\$ac_cs_config\\"
 
 Copyright (C) 2010 Free Software Foundation, Inc.
@@ -14649,7 +14657,7 @@ do
     "Misc/python.pc") CONFIG_FILES="$CONFIG_FILES Misc/python.pc" ;;
     "Modules/ld_so_aix") CONFIG_FILES="$CONFIG_FILES Modules/ld_so_aix" ;;
 
-  *) as_fn_error $? "invalid argument: \`$ac_config_target'" "$LINENO" 5;;
+  *) as_fn_error $? "invalid argument: \`$ac_config_target'" "$LINENO" 5 ;;
   esac
 done
 
@@ -14671,10 +14679,9 @@ fi
 # after its creation but before its name has been assigned to `$tmp'.
 $debug ||
 {
-  tmp= ac_tmp=
+  tmp=
   trap 'exit_status=$?
-  : "${ac_tmp:=$tmp}"
-  { test ! -d "$ac_tmp" || rm -fr "$ac_tmp"; } && exit $exit_status
+  { test -z "$tmp" || test ! -d "$tmp" || rm -fr "$tmp"; } && exit $exit_status
 ' 0
   trap 'as_fn_exit 1' 1 2 13 15
 }
@@ -14682,13 +14689,12 @@ $debug ||
 
 {
   tmp=`(umask 077 && mktemp -d "./confXXXXXX") 2>/dev/null` &&
-  test -d "$tmp"
+  test -n "$tmp" && test -d "$tmp"
 }  ||
 {
   tmp=./conf$$-$RANDOM
   (umask 077 && mkdir "$tmp")
 } || as_fn_error $? "cannot create a temporary directory in ." "$LINENO" 5
-ac_tmp=$tmp
 
 # Set up the scripts for CONFIG_FILES section.
 # No need to generate them if there are no CONFIG_FILES.
@@ -14710,7 +14716,7 @@ else
   ac_cs_awk_cr=$ac_cr
 fi
 
-echo 'BEGIN {' >"$ac_tmp/subs1.awk" &&
+echo 'BEGIN {' >"$tmp/subs1.awk" &&
 _ACEOF
 
 
@@ -14738,7 +14744,7 @@ done
 rm -f conf$$subs.sh
 
 cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
-cat >>"\$ac_tmp/subs1.awk" <<\\_ACAWK &&
+cat >>"\$tmp/subs1.awk" <<\\_ACAWK &&
 _ACEOF
 sed -n '
 h
@@ -14786,7 +14792,7 @@ t delim
 rm -f conf$$subs.awk
 cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
 _ACAWK
-cat >>"\$ac_tmp/subs1.awk" <<_ACAWK &&
+cat >>"\$tmp/subs1.awk" <<_ACAWK &&
   for (key in S) S_is_set[key] = 1
   FS = ""
 
@@ -14818,7 +14824,7 @@ if sed "s/$ac_cr//" < /dev/null > /dev/null 2>&1; then
   sed "s/$ac_cr\$//; s/$ac_cr/$ac_cs_awk_cr/g"
 else
   cat
-fi < "$ac_tmp/subs1.awk" > "$ac_tmp/subs.awk" \
+fi < "$tmp/subs1.awk" > "$tmp/subs.awk" \
   || as_fn_error $? "could not setup config files machinery" "$LINENO" 5
 _ACEOF
 
@@ -14852,7 +14858,7 @@ fi # test -n "$CONFIG_FILES"
 # No need to generate them if there are no CONFIG_HEADERS.
 # This happens for instance with `./config.status Makefile'.
 if test -n "$CONFIG_HEADERS"; then
-cat >"$ac_tmp/defines.awk" <<\_ACAWK ||
+cat >"$tmp/defines.awk" <<\_ACAWK ||
 BEGIN {
 _ACEOF
 
@@ -14864,8 +14870,8 @@ _ACEOF
 # handling of long lines.
 ac_delim='%!_!# '
 for ac_last_try in false false :; do
-  ac_tt=`sed -n "/$ac_delim/p" confdefs.h`
-  if test -z "$ac_tt"; then
+  ac_t=`sed -n "/$ac_delim/p" confdefs.h`
+  if test -z "$ac_t"; then
     break
   elif $ac_last_try; then
     as_fn_error $? "could not make $CONFIG_HEADERS" "$LINENO" 5
@@ -14966,7 +14972,7 @@ do
   esac
   case $ac_mode$ac_tag in
   :[FHL]*:*);;
-  :L* | :C*:*) as_fn_error $? "invalid tag \`$ac_tag'" "$LINENO" 5;;
+  :L* | :C*:*) as_fn_error $? "invalid tag \`$ac_tag'" "$LINENO" 5 ;;
   :[FH]-) ac_tag=-:-;;
   :[FH]*) ac_tag=$ac_tag:$ac_tag.in;;
   esac
@@ -14985,7 +14991,7 @@ do
     for ac_f
     do
       case $ac_f in
-      -) ac_f="$ac_tmp/stdin";;
+      -) ac_f="$tmp/stdin";;
       *) # Look for the file first in the build tree, then in the source tree
 	 # (if the path is not absolute).  The absolute path cannot be DOS-style,
 	 # because $ac_f cannot contain `:'.
@@ -14994,7 +15000,7 @@ do
 	   [\\/$]*) false;;
 	   *) test -f "$srcdir/$ac_f" && ac_f="$srcdir/$ac_f";;
 	   esac ||
-	   as_fn_error 1 "cannot find input file: \`$ac_f'" "$LINENO" 5;;
+	   as_fn_error 1 "cannot find input file: \`$ac_f'" "$LINENO" 5 ;;
       esac
       case $ac_f in *\'*) ac_f=`$as_echo "$ac_f" | sed "s/'/'\\\\\\\\''/g"`;; esac
       as_fn_append ac_file_inputs " '$ac_f'"
@@ -15020,8 +15026,8 @@ $as_echo "$as_me: creating $ac_file" >&6;}
     esac
 
     case $ac_tag in
-    *:-:* | *:-) cat >"$ac_tmp/stdin" \
-      || as_fn_error $? "could not create $ac_file" "$LINENO" 5 ;;
+    *:-:* | *:-) cat >"$tmp/stdin" \
+      || as_fn_error $? "could not create $ac_file" "$LINENO" 5  ;;
     esac
     ;;
   esac
@@ -15151,22 +15157,21 @@ s&@abs_top_builddir@&$ac_abs_top_builddir&;t t
 s&@INSTALL@&$ac_INSTALL&;t t
 $ac_datarootdir_hack
 "
-eval sed \"\$ac_sed_extra\" "$ac_file_inputs" | $AWK -f "$ac_tmp/subs.awk" \
-  >$ac_tmp/out || as_fn_error $? "could not create $ac_file" "$LINENO" 5
+eval sed \"\$ac_sed_extra\" "$ac_file_inputs" | $AWK -f "$tmp/subs.awk" >$tmp/out \
+  || as_fn_error $? "could not create $ac_file" "$LINENO" 5
 
 test -z "$ac_datarootdir_hack$ac_datarootdir_seen" &&
-  { ac_out=`sed -n '/\${datarootdir}/p' "$ac_tmp/out"`; test -n "$ac_out"; } &&
-  { ac_out=`sed -n '/^[	 ]*datarootdir[	 ]*:*=/p' \
-      "$ac_tmp/out"`; test -z "$ac_out"; } &&
+  { ac_out=`sed -n '/\${datarootdir}/p' "$tmp/out"`; test -n "$ac_out"; } &&
+  { ac_out=`sed -n '/^[	 ]*datarootdir[	 ]*:*=/p' "$tmp/out"`; test -z "$ac_out"; } &&
   { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: $ac_file contains a reference to the variable \`datarootdir'
 which seems to be undefined.  Please make sure it is defined" >&5
 $as_echo "$as_me: WARNING: $ac_file contains a reference to the variable \`datarootdir'
 which seems to be undefined.  Please make sure it is defined" >&2;}
 
-  rm -f "$ac_tmp/stdin"
+  rm -f "$tmp/stdin"
   case $ac_file in
-  -) cat "$ac_tmp/out" && rm -f "$ac_tmp/out";;
-  *) rm -f "$ac_file" && mv "$ac_tmp/out" "$ac_file";;
+  -) cat "$tmp/out" && rm -f "$tmp/out";;
+  *) rm -f "$ac_file" && mv "$tmp/out" "$ac_file";;
   esac \
   || as_fn_error $? "could not create $ac_file" "$LINENO" 5
  ;;
@@ -15177,20 +15182,20 @@ which seems to be undefined.  Please make sure it is defined" >&2;}
   if test x"$ac_file" != x-; then
     {
       $as_echo "/* $configure_input  */" \
-      && eval '$AWK -f "$ac_tmp/defines.awk"' "$ac_file_inputs"
-    } >"$ac_tmp/config.h" \
+      && eval '$AWK -f "$tmp/defines.awk"' "$ac_file_inputs"
+    } >"$tmp/config.h" \
       || as_fn_error $? "could not create $ac_file" "$LINENO" 5
-    if diff "$ac_file" "$ac_tmp/config.h" >/dev/null 2>&1; then
+    if diff "$ac_file" "$tmp/config.h" >/dev/null 2>&1; then
       { $as_echo "$as_me:${as_lineno-$LINENO}: $ac_file is unchanged" >&5
 $as_echo "$as_me: $ac_file is unchanged" >&6;}
     else
       rm -f "$ac_file"
-      mv "$ac_tmp/config.h" "$ac_file" \
+      mv "$tmp/config.h" "$ac_file" \
 	|| as_fn_error $? "could not create $ac_file" "$LINENO" 5
     fi
   else
     $as_echo "/* $configure_input  */" \
-      && eval '$AWK -f "$ac_tmp/defines.awk"' "$ac_file_inputs" \
+      && eval '$AWK -f "$tmp/defines.awk"' "$ac_file_inputs" \
       || as_fn_error $? "could not create -" "$LINENO" 5
   fi
  ;;

configure.in

@@ -2696,6 +2696,15 @@ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
   [AC_MSG_RESULT(no)
 ])
 
+AC_MSG_CHECKING(for broken unsetenv)
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+#include <stdlib.h>
+]], [[int res = unsetenv("DUMMY")]])],
+  [AC_MSG_RESULT(no)],
+  [AC_DEFINE(HAVE_BROKEN_UNSETENV, 1, Define if `unsetenv` does not return an int.)
+   AC_MSG_RESULT(yes)
+])
+
 dnl check for true
 AC_CHECK_PROGS(TRUE, true, /bin/true)
 

pyconfig.h.in

@@ -98,6 +98,9 @@
 /* define to 1 if your sem_getvalue is broken. */
 #undef HAVE_BROKEN_SEM_GETVALUE
 
+/* Define if `unsetenv` does not return an int. */
+#undef HAVE_BROKEN_UNSETENV
+
 /* Define this if you have the type _Bool. */
 #undef HAVE_C99_BOOL