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| author | Gregory P. Smith <greg@krypto.org> | 2016-04-15 23:58:51 (GMT) |
|---|---|---|
| committer | Gregory P. Smith <greg@krypto.org> | 2016-04-15 23:58:51 (GMT) |
| commit | 79a12a2aa5087a840988a77a2e1c59c2febe182d (patch) | |
| tree | 9e92dee3418aaa8cb2d39a7691ad8f782600b9c6 /configure.ac | |
| parent | a9dd804c36b2ab4bbb0e90e541224ee21ef92d73 (diff) | |
| parent | d82da9f7f22cd0e81e4de3d7331668d3aa9b0811 (diff) | |
| download | cpython-79a12a2aa5087a840988a77a2e1c59c2febe182d.zip cpython-79a12a2aa5087a840988a77a2e1c59c2febe182d.tar.gz cpython-79a12a2aa5087a840988a77a2e1c59c2febe182d.tar.bz2 | |
Issue #25702: A --with-lto configure option has been added that will
enable link time optimizations at build time during a make profile-opt.
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac index 837b43a..326afbc 100644 --- a/configure.ac +++ b/configure.ac @@ -1235,6 +1235,39 @@ else AC_MSG_RESULT(no); Py_DEBUG='false' fi], [AC_MSG_RESULT(no)]) +# Enable LTO flags +AC_SUBST(LTOFLAGS) +AC_MSG_CHECKING(for --with-lto) +AC_ARG_WITH(lto, AS_HELP_STRING([--with-lto], [Enable Link Time Optimization in PGO builds. Disabled by default.]), +[ +if test "$withval" != no +then + Py_LTO='true' + AC_MSG_RESULT(yes); +else + Py_LTO='false' + AC_MSG_RESULT(no); +fi], +[AC_MSG_RESULT(no)]) +if test "$Py_LTO" = 'true' ; then + case $CC in + *clang*) + # Any changes made here should be reflected in the GCC+Darwin case below + LTOFLAGS="-flto" + ;; + *gcc*) + case $ac_sys_system in + Darwin*) + LTOFLAGS="-flto" + ;; + *) + LTOFLAGS="-flto -fuse-linker-plugin -ffat-lto-objects -flto-partition=none" + ;; + esac + ;; + esac +fi + # Enable PGO flags. AC_SUBST(PGO_PROF_GEN_FLAG) AC_SUBST(PGO_PROF_USE_FLAG) |