Fix historic autoconf-generated checks to not fail with C99 compilers.
There is no need to upstream this patch because current autoconf no
longer generates these problematic checks.
diff --git a/configure b/configure
index f4812065f79460af..dfc195eb7d62840d 100755
--- a/configure
+++ b/configure
@@ -2098,7 +2098,7 @@ if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); }; }; then
for ac_declaration in \
- '' \
+ '#include <stdlib.h>' \
'extern "C" void std::exit (int) throw (); using std::exit;' \
'extern "C" void std::exit (int); using std::exit;' \
'extern "C" void exit (int) throw ();' \
@@ -2759,8 +2759,8 @@ main ()
for (i = 0; i < 256; i++)
if (XOR (islower (i), ISLOWER (i))
|| toupper (i) != TOUPPER (i))
- exit(2);
- exit (0);
+ return 2;
+ return 0;
}
_ACEOF
rm -f conftest$ac_exeext