From: Wouter Wijngaards <wouter@nlnetlabs.nl>
Date: Fri, 11 Dec 2015 13:28:33 +0000 (+0000)
Subject: test flto for clang (test #2)
X-Git-Tag: release-1.5.8~53
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7489a2c31e0a0115b36f3293db7fa5399fb2d5da;p=thirdparty%2Funbound.git

test flto for clang (test #2)


git-svn-id: file:///svn/unbound/trunk@3585 be551aaa-1e26-0410-a405-d3ace91eadb9
---

diff --git a/acx_nlnetlabs.m4 b/acx_nlnetlabs.m4
index 8d889f545..f17c6552d 100644
--- a/acx_nlnetlabs.m4
+++ b/acx_nlnetlabs.m4
@@ -421,13 +421,12 @@ AC_DEFUN([ACX_CHECK_FLTO], [
     AS_IF([test "x$enable_flto" != "xno"], [
         AC_MSG_CHECKING([if $CC supports -flto])
         BAKCFLAGS="$CFLAGS"
-        CFLAGS="$CFLAGS -flto -Werror"
+        CFLAGS="$CFLAGS -flto"
         AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])], [
-            if $CC $CFLAGS -o conftest conftest.c 2>&1 | grep "warning: no debug symbols in executable" >/dev/null; then
+            if $CC $CFLAGS -o conftest conftest.c 2>&1 | grep -e "warning: no debug symbols in executable" -e "warning: object" >/dev/null; then
                 CFLAGS="$BAKCFLAGS"
                 AC_MSG_RESULT(no)
             else
-                CFLAGS="$CFLAGS -flto"
                 AC_MSG_RESULT(yes)
             fi
             rm -f conftest conftest.c conftest.o
diff --git a/configure b/configure
index 897ac7d07..35aa23f75 100755
--- a/configure
+++ b/configure
@@ -5859,7 +5859,7 @@ fi
         { $as_echo "$as_me:${as_lineno-$LINENO}: checking if $CC supports -flto" >&5
 $as_echo_n "checking if $CC supports -flto... " >&6; }
         BAKCFLAGS="$CFLAGS"
-        CFLAGS="$CFLAGS -flto -Werror"
+        CFLAGS="$CFLAGS -flto"
         cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
@@ -5873,12 +5873,11 @@ main ()
 _ACEOF
 if ac_fn_c_try_link "$LINENO"; then :
 
-            if $CC $CFLAGS -o conftest conftest.c 2>&1 | grep "warning: no debug symbols in executable" >/dev/null; then
+            if $CC $CFLAGS -o conftest conftest.c 2>&1 | grep -e "warning: no debug symbols in executable" -e "warning: object" >/dev/null; then
                 CFLAGS="$BAKCFLAGS"
                 { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
 $as_echo "no" >&6; }
             else
-                CFLAGS="$CFLAGS -flto"
                 { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 $as_echo "yes" >&6; }
             fi