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Prep v233.4: Update LTO usage to be more convenient.
[elogind.git]
/
configure.ac
diff --git
a/configure.ac
b/configure.ac
index df38297bfdf4c79841e4df290cd08084b891b214..e67cbdd607c6e2d8321fe4fb5444adb858c8f1e4 100644
(file)
--- a/
configure.ac
+++ b/
configure.ac
@@
-247,14
+247,20
@@
AS_CASE([$CC], [*clang*],
])])
# ------------------------------------------------------------------------------
])])
# ------------------------------------------------------------------------------
+have_lto=no
AC_ARG_ENABLE([lto], [AS_HELP_STRING([--disable-lto], [disable -flto])],
[], [enable_lto=yes])
AS_CASE([$CFLAGS], [*-O[[12345sz\ ]]*],
AC_ARG_ENABLE([lto], [AS_HELP_STRING([--disable-lto], [disable -flto])],
[], [enable_lto=yes])
AS_CASE([$CFLAGS], [*-O[[12345sz\ ]]*],
- [AS_IF([test "x$enable_lto" = "xyes"],
- [CC_CHECK_FLAGS_APPEND([with_cflags], [CFLAGS], [-flto])],
+ [AS_IF([test "x$enable_lto" = "xyes"], [have_lto=yes],
[AC_MSG_RESULT([disabling -flto as requested])])],
[AC_MSG_RESULT([skipping -flto, optimization not enabled])])
[AC_MSG_RESULT([disabling -flto as requested])])],
[AC_MSG_RESULT([skipping -flto, optimization not enabled])])
+AS_IF([test "x$have_lto" = "xyes"],
+ [CC_CHECK_FLAGS_APPEND([with_cflags], [CFLAGS],
+ [-flto -fuse-linker-plugin])])
+
+AS_CASE([$with_cflags], [*-flto*], [], [have_lto=no])
+
# ------------------------------------------------------------------------------
AS_CASE([$CFLAGS], [*-O[[12345sz\ ]]*],
[CC_CHECK_FLAGS_APPEND([with_cppflags], [CPPFLAGS], [\
# ------------------------------------------------------------------------------
AS_CASE([$CFLAGS], [*-O[[12345sz\ ]]*],
[CC_CHECK_FLAGS_APPEND([with_cppflags], [CPPFLAGS], [\
@@
-279,8
+285,9
@@
CC_CHECK_FLAGS_APPEND([with_ldflags], [LDFLAGS], [\
-Wl,--no-undefined \
-Wl,-z,relro \
-Wl,-z,now \
-Wl,--no-undefined \
-Wl,-z,relro \
-Wl,-z,now \
- -pie \
- -Wl,-fuse-ld=gold])
+ -pie])
+AS_IF([test "x$have_lto" = "xyes"],
+ [CC_CHECK_FLAGS_APPEND([with_ldflags], [LDFLAGS], [-Wl,-fuse-ld=gold])])
# ------------------------------------------------------------------------------
AC_SUBST([OUR_CPPFLAGS], "$with_cppflags $sanitizer_cppflags")
# ------------------------------------------------------------------------------
AC_SUBST([OUR_CPPFLAGS], "$with_cppflags $sanitizer_cppflags")
@@
-865,6
+872,7
@@
AC_MSG_RESULT([
test coverage: . . . . . . . . . . ${have_coverage}
Split /usr: . . . . . . . . . . . ${enable_split_usr}
utmp/wtmp support: . . . . . . . . ${have_utmp}
test coverage: . . . . . . . . . . ${have_coverage}
Split /usr: . . . . . . . . . . . ${enable_split_usr}
utmp/wtmp support: . . . . . . . . ${have_utmp}
+ Link time optimization: . . . . . ${have_lto}
extra debugging: . . . . . . . . . ${enable_debug}
cgroup controller: . . . . . . . . ${with_cgroupctrl}
extra debugging: . . . . . . . . . ${enable_debug}
cgroup controller: . . . . . . . . ${with_cgroupctrl}