diff --git configure.in configure.in
index f8c943d5..d112646a 100644
--- configure.in
+++ configure.in
@@ -200,7 +200,7 @@ OLDLDFLAGS=$LDFLAGS
 LDFLAGS="$LDFLAGS -export-dynamic"
 dnl AC_TRY_LINK gives false positive on rs6000-ibm-aix4.2.1.0
 dnl AC_TRY_LINK(,,ac_export_dynamic=yes,ac_export_dynamic=no)
-AC_TRY_RUN(main(){exit(0);},ac_export_dynamic=yes,ac_export_dynamic=no,ac_export_dynamic=no)
+AC_TRY_RUN(int main(){return 0;},ac_export_dynamic=yes,ac_export_dynamic=no,ac_export_dynamic=no)
 test $ac_export_dynamic = yes|| LDFLAGS=$OLDLDFLAGS
 AC_MSG_RESULT($ac_export_dynamic)
 
@@ -737,9 +737,9 @@ if test -z "$skipcode"; then
     do
 	AC_TRY_RUN(
 [int foo(int,int,int);
-main()
+int main()
 {
-  exit(foo(0,0,0)!=16);
+  return foo(0,0,0)!=16;
 }
 int foo(int x, int y, int z)
 {