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From 2d5ee8de927f69784d8380c24ca5505b3f6e7672 Mon Sep 17 00:00:00 2001
From: systemd team <systemd-maint@redhat.com>
Date: Tue, 14 Apr 2015 15:00:06 +0200
Subject: [PATCH] build-sys: add configure option to disableLTO/gold
---
configure.ac | 15 ++++++++++-----
1 file changed, 10 insertions(+), 5 deletions(-)
diff --git a/configure.ac b/configure.ac
index 081ed0f6e..9103f9b92 100644
--- a/configure.ac
+++ b/configure.ac
@@ -208,10 +208,15 @@ AS_CASE([$CC], [*clang*],
-Wno-gnu-variable-sized-type-not-at-end \
])])
-AS_CASE([$CFLAGS], [*-O[[12345sz\ ]]*],
- [CC_CHECK_FLAGS_APPEND([with_cflags], [CFLAGS], [\
- -flto -ffat-lto-objects])],
- [AC_MSG_RESULT([skipping -flto, optimization not enabled])])
+AC_ARG_ENABLE([lto], AS_HELP_STRING([--disable-lto], [Disable Link time optimization]))
+AS_IF([test "x$enable_lto" != "xno"], [
+AS_CASE([$CFLAGS], [*-O[[12345\ ]]*], [
+ CC_CHECK_FLAGS_APPEND([with_cflags], [CFLAGS], [-flto -ffat-lto-objects])
+ CC_CHECK_FLAGS_APPEND([with_ldflags], [LDFLAGS],[-Wl,-fuse-ld=gold])
+ ],
+[AC_MSG_RESULT([skipping -flto, optimization not enabled])])
+])
+
AC_SUBST([OUR_CFLAGS], "$with_cflags $sanitizer_cflags")
AS_CASE([$CFLAGS], [*-O[[12345sz\ ]]*],
@@ -227,7 +232,7 @@ CC_CHECK_FLAGS_APPEND([with_ldflags], [LDFLAGS], [\
-Wl,-z,relro \
-Wl,-z,now \
-pie \
- -Wl,-fuse-ld=gold])
+ ])
AC_SUBST([OUR_LDFLAGS], "$with_ldflags $sanitizer_ldflags")
AC_CHECK_SIZEOF(pid_t)