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From 2d5ee8de927f69784d8380c24ca5505b3f6e7672 Mon Sep 17 00:00:00 2001
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From: systemd team <systemd-maint@redhat.com>
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Date: Tue, 14 Apr 2015 15:00:06 +0200
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Subject: [PATCH] build-sys: add configure option to disableLTO/gold
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---
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configure.ac | 15 ++++++++++-----
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1 file changed, 10 insertions(+), 5 deletions(-)
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diff --git a/configure.ac b/configure.ac
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index 081ed0f6eb..9103f9b923 100644
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--- a/configure.ac
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+++ b/configure.ac
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@@ -208,10 +208,15 @@ AS_CASE([$CC], [*clang*],
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-Wno-gnu-variable-sized-type-not-at-end \
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])])
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-AS_CASE([$CFLAGS], [*-O[[12345sz\ ]]*],
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- [CC_CHECK_FLAGS_APPEND([with_cflags], [CFLAGS], [\
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- -flto -ffat-lto-objects])],
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- [AC_MSG_RESULT([skipping -flto, optimization not enabled])])
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+AC_ARG_ENABLE([lto], AS_HELP_STRING([--disable-lto], [Disable Link time optimization]))
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+AS_IF([test "x$enable_lto" != "xno"], [
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+AS_CASE([$CFLAGS], [*-O[[12345\ ]]*], [
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+ CC_CHECK_FLAGS_APPEND([with_cflags], [CFLAGS], [-flto -ffat-lto-objects])
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+ CC_CHECK_FLAGS_APPEND([with_ldflags], [LDFLAGS],[-Wl,-fuse-ld=gold])
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+ ],
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+[AC_MSG_RESULT([skipping -flto, optimization not enabled])])
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+])
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+
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AC_SUBST([OUR_CFLAGS], "$with_cflags $sanitizer_cflags")
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AS_CASE([$CFLAGS], [*-O[[12345sz\ ]]*],
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@@ -227,7 +232,7 @@ CC_CHECK_FLAGS_APPEND([with_ldflags], [LDFLAGS], [\
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-Wl,-z,relro \
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-Wl,-z,now \
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-pie \
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- -Wl,-fuse-ld=gold])
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+ ])
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AC_SUBST([OUR_LDFLAGS], "$with_ldflags $sanitizer_ldflags")
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AC_CHECK_SIZEOF(pid_t)
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