| Python doesn't directly effortlessly support the use of a PGO profile that |
| wasn't generated during the *current* build. |
| |
| profile-opt includes PGO profile generation, which is slow (requires multiple |
| builds & a lengthy test phase), and makes determinism harder. If we place a PGO |
| profile in the place where profile-opt normally puts one & instead use |
| build_all_use_profile, all of this works effortlessly with a pre-rolled |
| profile. |
| |
| --- a/configure.ac |
| +++ b/configure.ac |
| @@ -1299,7 +1299,7 @@ if test "$Py_OPT" = 'true' ; then |
| # compile working code using it and both test_distutils and test_gdb are |
| # broken when you do manage to get a toolchain that works with it. People |
| # who want LTO need to use --with-lto themselves. |
| - DEF_MAKE_ALL_RULE="profile-opt" |
| + DEF_MAKE_ALL_RULE="build_all_use_profile" |
| REQUIRE_PGO="yes" |
| DEF_MAKE_RULE="build_all" |
| else |
