chiark / gitweb /
build-sys: enable gcc Link Time Optimization when optimization is enabled
authorKay Sievers <kay@vrfy.org>
Thu, 21 Nov 2013 20:56:18 +0000 (21:56 +0100)
committerKay Sievers <kay@vrfy.org>
Thu, 21 Nov 2013 20:56:18 +0000 (21:56 +0100)
configure.ac

index 7794541..c0656f4 100644 (file)
@@ -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\ ]]*],