Bug#575448: please package gcc-4.5's gold LTO plugin!

[Török Edwin <edwintorok@gmail.com>]

On 2010-03-26 01:27, Matthias Klose wrote:
> On 25.03.2010 22:19, Török Edwin wrote:
>> Package: gcc-4.5
>> Version: 4.5-20100227-1
>> Severity: wishlist
>>
>> GCC-4.5 has a gold linker plugin to do LTO, see
>> http://gcc.gnu.org/wiki/whopr/driver
>>
>> It should already be built during a normal gcc-4.5 build,
>> the plugin should be called  liblto-plugin.so.
>>
>> I can't find that in the Debian experimental package, please add it to
>> the
>> gcc-4.5 package (or create a new package for it).
> 
> It was built before, you can enable it in a local build. Last time I
> built using gold, the build went wrong: #571169. 

Seems to be working now,
I am using this binutils-gold package though: 2.20.1-3, not the one from
experimental.

I commented out this line in debian/rules.defs
# FIXME: stripping doesn't work with gold
#with_gold := no

I disabled the testsuite too (was taking way too long):
# if you don't want to run the gcc testsuite, uncomment the next line
with_check := disabled by hand

Also
I had some trouble with building the doc packages, so I just did
a 'touch stamps/05-build-javadoc-stamp', didn't figure out how to turn
off the build of the docs package completely.

I installed these debs:
ii  cpp-4.5                               4.5-20100321-1
  The GNU C preprocessor
ii  gcc-4.5                               4.5-20100321-1
  The GNU C compiler
ii  gcc-4.5-base                          4.5-20100321-1
  The GNU Compiler Collection (base package)
ii  gcc-4.5-multilib                      4.5-20100321-1
  The GNU C compiler (multilib files)
ii  lib32gcc1                             1:4.5-20100321-1
  GCC support library (32 bit Version)
ii  lib32gomp1                            4.5-20100321-1
  GCC OpenMP (GOMP) support library (32bit)
ii  libgcc1                               1:4.5-20100321-1
  GCC support library
ii  libgomp1                              4.5-20100321-1
  GCC OpenMP (GOMP) support library
ii  libstdc++6                            4.5-20100321-1
  The GNU Standard C++ Library v3

apt-cache and everything else still seems to be working.


I found the LTO plugin here (it was not installed by the package)
./debian/tmp/usr/lib/gcc/x86_64-linux-gnu/4.5/liblto_plugin.so

So I copied it to /usr/lib/gcc/x86_64-linux-gnu/4.5/liblto_plugin.so
manally, and -fuse-linker-plugin seems to be working now
(well I get an ICE from it when trying to build ClamAV, will open a bug
about that shortly).

Can you please make the package install liblto_plugin.so when with_gold
is yes?

> If you retry, please
> report the results in this report.

I'm not sure I understand what 'this' refers to here (#575448 or
#571169), so I'll just report it here.

Best regards,
--Edwin