Use AC_FUNC_SETPGRP.

configure

 #! /bin/sh
-# From configure.in Revision: 1.328 .
+# From configure.in Revision: 1.329 .
 # Guess values for system-dependent variables and create Makefiles.
 # Generated by GNU Autoconf 2.53.
 #
@@ -12068,29 +12068,22 @@ rm -f conftest.$ac_objext conftest.$ac_ext
 fi
 done
 
-
-for ac_func in setpgrp
-do
-as_ac_var=`echo "ac_cv_func_$ac_func" | $as_tr_sh`
-echo "$as_me:$LINENO: checking for $ac_func" >&5
-echo $ECHO_N "checking for $ac_func... $ECHO_C" >&6
-if eval "test \"\${$as_ac_var+set}\" = set"; then
+echo "$as_me:$LINENO: checking whether setpgrp takes no argument" >&5
+echo $ECHO_N "checking whether setpgrp takes no argument... $ECHO_C" >&6
+if test "${ac_cv_func_setpgrp_void+set}" = set; then
   echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  if test "$cross_compiling" = yes; then
+  { { echo "$as_me:$LINENO: error: cannot check setpgrp when cross compiling" >&5
+echo "$as_me: error: cannot check setpgrp when cross compiling" >&2;}
+   { (exit 1); exit 1; }; }
 else
   cat >conftest.$ac_ext <<_ACEOF
 #line $LINENO "configure"
 #include "confdefs.h"
-/* System header to define __stub macros and hopefully few prototypes,
-    which can conflict with char $ac_func (); below.  */
-#include <assert.h>
-/* Override any gcc2 internal prototype to avoid an error.  */
-#ifdef __cplusplus
-extern "C"
+#if HAVE_UNISTD_H
+# include <unistd.h>
 #endif
-/* We use char because int might match the return type of a gcc2
-   builtin and then its argument prototype would still apply.  */
-char $ac_func ();
-char (*f) ();
 
 #ifdef F77_DUMMY_MAIN
 #  ifdef __cplusplus
@@ -12101,89 +12094,45 @@ char (*f) ();
 int
 main ()
 {
-/* The GNU C library defines this for functions which it implements
-    to always fail with ENOSYS.  Some functions are actually named
-    something starting with __ and the normal name is an alias.  */
-#if defined (__stub_$ac_func) || defined (__stub___$ac_func)
-choke me
-#else
-f = $ac_func;
-#endif
-
+/* If this system has a BSD-style setpgrp which takes arguments,
+  setpgrp(1, 1) will fail with ESRCH and return -1, in that case
+  exit successfully. */
+  exit (setpgrp (1,1) == -1 ? 0 : 1);
   ;
   return 0;
 }
 _ACEOF
-rm -f conftest.$ac_objext conftest$ac_exeext
+rm -f conftest$ac_exeext
 if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
   (eval $ac_link) 2>&5
   ac_status=$?
   echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } &&
-         { ac_try='test -s conftest$ac_exeext'
+  (exit $ac_status); } && { ac_try='./conftest$ac_exeext'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
   echo "$as_me:$LINENO: \$? = $ac_status" >&5
   (exit $ac_status); }; }; then
-  eval "$as_ac_var=yes"
+  ac_cv_func_setpgrp_void=no
 else
-  echo "$as_me: failed program was:" >&5
+  echo "$as_me: program exited with status $ac_status" >&5
+echo "$as_me: failed program was:" >&5
 cat conftest.$ac_ext >&5
-eval "$as_ac_var=no"
+( exit $ac_status )
+ac_cv_func_setpgrp_void=yes
 fi
-rm -f conftest.$ac_objext conftest$ac_exeext conftest.$ac_ext
+rm -f core core.* *.core conftest$ac_exeext conftest.$ac_objext conftest.$ac_ext
 fi
-echo "$as_me:$LINENO: result: `eval echo '${'$as_ac_var'}'`" >&5
-echo "${ECHO_T}`eval echo '${'$as_ac_var'}'`" >&6
-if test `eval echo '${'$as_ac_var'}'` = yes; then
-  cat >>confdefs.h <<_ACEOF
-#define `echo "HAVE_$ac_func" | $as_tr_cpp` 1
-_ACEOF
- cat >conftest.$ac_ext <<_ACEOF
-#line $LINENO "configure"
-#include "confdefs.h"
-#include <unistd.h>
-#ifdef F77_DUMMY_MAIN
-#  ifdef __cplusplus
-     extern "C"
-#  endif
-   int F77_DUMMY_MAIN() { return 1; }
-#endif
-int
-main ()
-{
-setpgrp(0,0);
-  ;
-  return 0;
-}
-_ACEOF
-rm -f conftest.$ac_objext
-if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
-  (eval $ac_compile) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } &&
-         { ac_try='test -s conftest.$ac_objext'
-  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
-  (eval $ac_try) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); }; }; then
+fi
+echo "$as_me:$LINENO: result: $ac_cv_func_setpgrp_void" >&5
+echo "${ECHO_T}$ac_cv_func_setpgrp_void" >&6
+if test $ac_cv_func_setpgrp_void = yes; then
 
 cat >>confdefs.h <<\_ACEOF
-#define SETPGRP_HAVE_ARG 1
+#define SETPGRP_VOID 1
 _ACEOF
 
-
-else
-  echo "$as_me: failed program was:" >&5
-cat conftest.$ac_ext >&5
-fi
-rm -f conftest.$ac_objext conftest.$ac_ext
-
 fi
-done
 
 
 for ac_func in gettimeofday

configure.in

@@ -1632,12 +1632,8 @@ AC_CHECK_FUNCS(getpgrp,
    [Define if getpgrp() must be called as getpgrp(0).])
  )
 )
-AC_CHECK_FUNCS(setpgrp, 
-  AC_TRY_COMPILE([#include <unistd.h>], 
-   [setpgrp(0,0);], 
-   AC_DEFINE(SETPGRP_HAVE_ARG, 1,
-   [Define if setpgrp() must be called as setpgrp(0, 0).])
-  )
+AC_FUNC_SETPGRP(AC_DEFINE(SETPGRP_HAVE_ARG, 1,
+	   [Define if setpgrp() must be called as setpgrp(0, 0).])
 )
 AC_CHECK_FUNCS(gettimeofday, 
   AC_TRY_COMPILE([#include <sys/time.h>],