summaryrefslogtreecommitdiffstats
path: root/m4/ld-O1.m4
diff options
context:
space:
mode:
Diffstat (limited to 'm4/ld-O1.m4')
-rw-r--r--m4/ld-O1.m424
1 files changed, 24 insertions, 0 deletions
diff --git a/m4/ld-O1.m4 b/m4/ld-O1.m4
new file mode 100644
index 0000000..f67b959
--- /dev/null
+++ b/m4/ld-O1.m4
@@ -0,0 +1,24 @@
+# ld-O1.m4 serial 3
+
+# Test if ld supports -O1
+
+AC_DEFUN([PAM_LD_O1],
+ [
+ AC_CACHE_CHECK(whether ld supports -O1,
+ pam_cv_ld_O1, [ dnl
+ cat > conftest.c <<EOF
+int main (void) { return 0; }
+EOF
+ if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
+ -o conftest.o conftest.c
+ -Wl,-O1 1>&AS_MESSAGE_LOG_FD])
+ then
+ pam_cv_ld_O1=yes
+ LDFLAGS="$LDFLAGS -Wl,-O1"
+ else
+ pam_cv_ld_O1=no
+ fi
+ rm -f conftest*])
+ AC_SUBST(pam_cv_ld_O1)
+ ]
+)