Test for --export-dynamic directly to avoid problems with binutils 2.12.

Will backport to 2.1 and 2.2.

configure

 #! /bin/sh
-# From configure.in Revision: 1.310 .
+# From configure.in Revision: 1.311 .
 # Guess values for system-dependent variables and create Makefiles.
 # Generated by GNU Autoconf 2.53.
 #
@@ -8849,7 +8849,7 @@ then
 		fi;;
 	SunOS/5*) case $CC in
 		  *gcc*)
-		    if $CC -Xlinker -V 2>&1 | grep BFD >/dev/null
+		    if $CC -Xlinker --help 2>&1 | grep export-dynamic >/dev/null
 		    then
 			LINKFORSHARED="-Xlinker --export-dynamic"
 		    fi;;

configure.in

@@ -984,7 +984,7 @@ then
 		fi;;
 	SunOS/5*) case $CC in
 		  *gcc*)
-		    if $CC -Xlinker -V 2>&1 | grep BFD >/dev/null
+		    if $CC -Xlinker --help 2>&1 | grep export-dynamic >/dev/null
 		    then
 			LINKFORSHARED="-Xlinker --export-dynamic"
 		    fi;;