AIX: Test the -qlonglong option before use.

xlc provides "long long" unconditionally at C99-compatible language
levels, and this option provokes a warning.  The warning interferes with
"configure" tests that fail in response to any warning.  Notably, before
commit 85a2a8903f7e9151793308d0638621003aded5ae, it interfered with the
test for -qnoansialias.  Back-patch to 9.0 (all supported versions).

1 files changed, 35 insertions, 0 deletions

diff --git a/configure b/configure
index 77048e8593b..2176d6583cf 100755
--- a/configure
+++ b/configure
@@ -4877,6 +4877,41 @@ if test x"$pgac_cv_prog_cc_cflags__qnoansialias" = x"yes"; then
   CFLAGS="$CFLAGS -qnoansialias"
 fi
 
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether $CC supports -qlonglong" >&5
+$as_echo_n "checking whether $CC supports -qlonglong... " >&6; }
+if ${pgac_cv_prog_cc_cflags__qlonglong+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  pgac_save_CFLAGS=$CFLAGS
+CFLAGS="$pgac_save_CFLAGS -qlonglong"
+ac_save_c_werror_flag=$ac_c_werror_flag
+ac_c_werror_flag=yes
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  pgac_cv_prog_cc_cflags__qlonglong=yes
+else
+  pgac_cv_prog_cc_cflags__qlonglong=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+ac_c_werror_flag=$ac_save_c_werror_flag
+CFLAGS="$pgac_save_CFLAGS"
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $pgac_cv_prog_cc_cflags__qlonglong" >&5
+$as_echo "$pgac_cv_prog_cc_cflags__qlonglong" >&6; }
+if test x"$pgac_cv_prog_cc_cflags__qlonglong" = x"yes"; then
+  CFLAGS="$CFLAGS -qlonglong"
+fi
+
 elif test "$PORTNAME" = "hpux"; then
   # On some versions of HP-UX, libm functions do not set errno by default.
   # Fix that by using +Olibmerrno if the compiler recognizes it.