build-sys: enable gcc Link Time Optimization when optimization is enabled

2013-11-21 21:56:18 +01:00 · 2013-11-21 21:56:18 +01:00 · b850b06e1e
parent 92b315dfb4
commit b850b06e1e
1 changed files with 4 additions and 0 deletions
--- a/configure.ac
+++ b/configure.ac
@ -156,6 +156,10 @@ CC_CHECK_FLAGS_APPEND([with_cflags], [CFLAGS], [\
        -fdata-sections \
        -fstack-protector \
        --param=ssp-buffer-size=4])
+AS_CASE([$CFLAGS], [*-O[[12345\ ]]*],
+        [CC_CHECK_FLAGS_APPEND([with_cflags], [CFLAGS], [\
+               -flto])],
+        [AC_MSG_RESULT([skipping -flto, optimization not enabled])])
 AC_SUBST([OUR_CFLAGS], "$with_cflags $address_sanitizer_cflags")

 AS_CASE([$CFLAGS], [*-O[[12345\ ]]*],