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| author | Paul Eggert <eggert@cs.ucla.edu> | 2014-06-19 23:07:47 -0700 |
|---|---|---|
| committer | Paul Eggert <eggert@cs.ucla.edu> | 2014-06-19 23:07:47 -0700 |
| commit | 0b20117e9624412004e4309228dcc54756ddfd50 (patch) | |
| tree | 278a70addde74c49ea5c419dac2da554e6374a51 /configure.ac | |
| parent | 500dce5f4d2a08570177d9b1019fa922f07e8508 (diff) | |
| download | emacs-0b20117e9624412004e4309228dcc54756ddfd50.tar.gz | |
Port to GCC 4.9.0 with link time optimization.
* configure.ac (CFLAGS): With link time optimization,
use -ffat-lto-objects if supported; otherwise Emacs won't
build with GCC 4.9.0.
Fixes: debbugs:17806
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac index 702b8570577..e9400047edc 100644 --- a/configure.ac +++ b/configure.ac @@ -777,6 +777,12 @@ if test "${enableval}" != "no"; then AC_MSG_RESULT([$ac_lto_supported]) if test "$ac_lto_supported" = "yes"; then CFLAGS="$CFLAGS $LTO" + dnl The following is needed for GCC 4.9.0. The GCC 4.9.0 release notes + dnl suggest that instead of -ffat-lto-objects we should use gcc-ar and + dnl gcc-ranlib in place of ar and ranlib, but gcc-ar makes /usr/bin/ar + dnl dump core on Fedora 20, so play it safe for now. + gl_COMPILER_OPTION_IF([-ffat-lto-objects], + [CFLAGS="$CFLAGS -ffat-lto-objects"]) fi fi) |