[Bug lto/45375] [meta-bug] Issues with building Mozilla with LTO

[hubicka at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45375

--- Comment #114 from Jan Hubicka <hubicka at gcc dot gnu.org> 2011-10-01 13:18:30 UTC ---
So quick summary
 1) -g build is still blocked by dwarf2out ICE
 2) build with gold works, but only without -fprofile-generate. FDO build is
also possible, but -fprofile-generate needs -fno-lto (that makes a lot of
sense, but we still should fix the bug at GCC side)
 3) With GNU LD, there is still bug that blocks Mozilla LTO
    http://sourceware.org/bugzilla/show_bug.cgi?id=13244
 4) Slim LTO works well. Build times are about the same as for non-LTO. One
needs the aforementioned configure hacks and ar/nm/ranlib wrappers.

Honza