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gcc48: turn on PGO on x86*, see #445

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Vladimír Čunát 2013-04-10 08:59:59 +02:00
parent 7655801b83
commit 3e208067ea
1 changed files with 3 additions and 3 deletions
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6
pkgs/top-level/all-packages.nix
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@ -2241,9 +2241,9 @@ let
gcc48_real = lowPrio (wrapGCC (callPackage ../development/compilers/gcc/4.8 {
inherit noSysDirs;
# I'm not sure if profiling with enableParallelBuilding helps a lot.
# We can enable it back some day. This makes the *gcc* builds faster now.
profiledCompiler = false;
# PGO seems to speed up compilation by gcc by ~10%, see #445 discussion
profiledCompiler = with stdenv; (isi686 || isx86_64);
# When building `gcc.crossDrv' (a "Canadian cross", with host == target
# and host != build), `cross' must be null but the cross-libc must still