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| author | Davide Cavalca <davide125@tiscali.it> | 2016-07-28 20:42:45 -0700 |
|---|---|---|
| committer | Zbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl> | 2016-07-28 23:42:45 -0400 |
| commit | 4e3382bdd70a54628ffe030c5d37e06713c329ab (patch) | |
| tree | da039e6682865207c63c30605e738cba41572a84 | |
| parent | 689e4e6a94222b4d58a8b9cb3c51cc2f82268aa9 (diff) | |
build-sys: conditionally disable LTO if requested (#3823)
This adds a --disable-lto option to ./configure, but does not change the
default behavior.
| -rw-r--r-- | configure.ac | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/configure.ac b/configure.ac index cf595e68c0..a86deca471 100644 --- a/configure.ac +++ b/configure.ac @@ -211,9 +211,12 @@ AS_CASE([$CC], [*clang*], -Wno-gnu-variable-sized-type-not-at-end \ ])]) +AC_ARG_ENABLE([lto], [AS_HELP_STRING([--disable-lto], [disable -flto])], + [], [enable_lto=yes]) AS_CASE([$CFLAGS], [*-O[[12345sz\ ]]*], - [CC_CHECK_FLAGS_APPEND([with_cflags], [CFLAGS], [\ - -flto])], + [AS_IF([test "x$enable_lto" = "xyes"], + [CC_CHECK_FLAGS_APPEND([with_cflags], [CFLAGS], [-flto])], + [AC_MSG_RESULT([disabling -flto as requested])])], [AC_MSG_RESULT([skipping -flto, optimization not enabled])]) AC_SUBST([OUR_CFLAGS], "$with_cflags $sanitizer_cflags") |