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

["hubicka at ucw dot cz" <gcc-bugzilla at gcc dot gnu dot org>]

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

--- Comment #59 from Jan Hubicka <hubicka at ucw dot cz> 2011-03-10 12:53:58 UTC ---
> > How do you do this with "make -f client.mk profiledbuild"?
> 
> To answer my own question:
> Just edit ./configure and ./js/src/configure and add
> "-flto=4 -fwhole-program" (or whatever you may prefer)
> to the PROFILE_USE_CFLAGS variable.
> Then you can build Firefox with "make -f client.mk profiledbuild".

I did not know of existence of profiledbuild and thus I did that by hand
where it was easy.
Perhaps Mozilla build mahcinery can be told to add -fno-lto into
-fprofile-generate
run.  Hmm, in fact perhaps GCC chould do that by default. Not sure if it is not
too
late for 4.6 however.
> 
> BTW libmozsqlite3.so still gets miscompiled, but Firefox is 
> now snappy as never before ;-)

yes, there is PR on this, but I have absolutely no idea if it is sqlite or GCC
bug.
Any help is greatly appreciated, sqlite is big blob of magic for me.