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test flto for clang (test #2)

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git-svn-id: file:///svn/unbound/trunk@3585 be551aaa-1e26-0410-a405-d3ace91eadb9
This commit is contained in:
Wouter Wijngaards 2015-12-11 13:28:33 +00:00
parent 72f13cb3df
commit 7489a2c31e
2 changed files with 4 additions and 6 deletions
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5
acx_nlnetlabs.m4
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@ -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

5
configure vendored
View file

@ -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