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

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

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

--- Comment #111 from Jan Hubicka <hubicka at gcc dot gnu.org> 2011-09-27 20:48:19 UTC ---
Mozilla now builds for me with slim LTO objects. I.e. with -flto=24
-fuse-linker-plugin -fno-fat-lto-objects
One needs ar/nm/ranlib that works with slim LTO. I simply set PATH to directory
with following scripts:
jh@evans:/abuild/jh/trunk-install/bin> cat nm
#!/bin/sh
/usr/bin/nm --plugin
/abuild/jh/trunk-install/libexec/gcc/x86_64-unknown-linux-gnu/4.7.0/liblto_plugin.so
$*
jh@evans:/abuild/jh/trunk-install/bin> cat ar
#!/bin/sh
cmd=$1
shift
/abuild/jh/trunk-install/bin/ar-with-plugin $cmd --plugin
/abuild/jh/trunk-install/libexec/gcc/x86_64-unknown-linux-gnu/4.7.0/liblto_plugin.so
$*
jh@evans:/abuild/jh/trunk-install/bin> cat ranlib
#!/bin/sh
jh@evans:/abuild/jh/trunk-install/bin> 

If I was not lazy to rebuild ranlib, I think it exists with plugin support now,
too.  Just disabling it was however equally easy.
I will do some benchmarks about build time/disk usage.

Resulting binary works too, BTW :)