From f0053845326e9eba290c78162ef355558cd2fc46 Mon Sep 17 00:00:00 2001
From: Peter Eisentraut <peter_e@gmx.net>
Date: Wed, 16 Feb 2011 23:06:36 +0200
Subject: [PATCH] Better support for thread-support flag detection with clang
When testing the stderr produced by various thread-support flags, also
run a compilation in addition to a link, because clang warns on
certain flags when compiling but not when linking.
---
config/acx_pthread.m4 | 3 ++-
configure | 3 ++-
2 files changed, 4 insertions(+), 2 deletions(-)
diff --git a/config/acx_pthread.m4 b/config/acx_pthread.m4
index ceb161a556a..6ff241eba19 100644
--- a/config/acx_pthread.m4
+++ b/config/acx_pthread.m4
@@ -142,7 +142,8 @@ main (int argc, char **argv)
}
_ACEOF
rm -f conftest.$ac_objext conftest$ac_exeext
- if test "`(eval $ac_link 2>&1 1>&5)`" = ""; then
+ # Check both linking and compiling, because they might tolerate different options.
+ if test "`(eval $ac_link 2>&1 1>&5)`" = "" && test "`(eval $ac_compile 2>&1 1>&5)`" = ""; then
# we continue with more flags because Linux needs -lpthread
# for libpq builds on PostgreSQL. The test above only
# tests for building binaries, not shared libraries.
diff --git a/configure b/configure
index f4d11abc7e1..a13bf24c8df 100755
--- a/configure
+++ b/configure
@@ -22814,7 +22814,8 @@ main (int argc, char **argv)
}
_ACEOF
rm -f conftest.$ac_objext conftest$ac_exeext
- if test "`(eval $ac_link 2>&1 1>&5)`" = ""; then
+ # Check both linking and compiling, because they might tolerate different options.
+ if test "`(eval $ac_link 2>&1 1>&5)`" = "" && test "`(eval $ac_compile 2>&1 1>&5)`" = ""; then
# we continue with more flags because Linux needs -lpthread
# for libpq builds on PostgreSQL. The test above only
# tests for building binaries, not shared libraries.
--
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