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| author | Matias Elo <matias.elo@nokia.com> | 2023-08-28 17:17:28 +0300 |
|---|---|---|
| committer | Matias Elo <matias.elo@nokia.com> | 2023-09-01 13:45:43 +0300 |
| commit | eb5960b4c26c8487524bd6933e7c71fedc386b42 (patch) | |
| tree | fb5c728fbba2bdf605ebc3e4647f74c5efdb6f06 /configure.ac | |
| parent | 65e4d3f3c4b5be8d6339a43f63b3dfe2c17c0f35 (diff) | |
configure: enable parallel lto
Add 'auto' argument to '-flto' to enable parallel LTO jobs, which may
reduce linking duration. Also, fixes "using serial compilation of N LTRANS
jobs" warnings when using GCC-12.
The '-flto=auto' and '-ffat-lto-objects' options are currently not
supported by clang.
Signed-off-by: Matias Elo <matias.elo@nokia.com>
Reviewed-by: Petri Savolainen <petri.savolainen@nokia.com>
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/configure.ac b/configure.ac index 0b91c6981..69290e34b 100644 --- a/configure.ac +++ b/configure.ac @@ -247,7 +247,14 @@ AC_ARG_ENABLE([lto], # Fat LTO object file contains GIMPLE bytecodes and the usual # final code. There are less build problems (e.g. due to older # binutils), but object files are larger. - ODP_LTO_FLAGS="-flto -ffat-lto-objects" + # + # -flto=auto and -ffat-lto-objects are currently not supported by clang. + $CC --version | grep -q clang + if test $? -ne 0; then + ODP_LTO_FLAGS="-flto=auto -ffat-lto-objects" + else + ODP_LTO_FLAGS="-flto" + fi fi]) ODP_CFLAGS="$ODP_CFLAGS $ODP_LTO_FLAGS" |