[ANNOUNCE]: clang compiling ports

[Pan Tsu]

Pan Tsu <inyaoo at gmail.com> writes:

> Roman Divacky <rdivacky at freebsd.org> writes:
>
>> Flz@ just run an exp-build with CC=clang and CXX=clang++. The results can be
>> seen here:
>>
>>         http://pointyhat.freebsd.org/errorlogs/amd64-9-exp-latest/
>>
>> A lot of these failures are trivial to fix (ie. not respecting CC setting, etc.)
>> and prevent a lot of other ports from building.
>
> Any extra libtool patches? I'm curious how did you work around ports/155157
>
>   foo.o: relocation R_X86_64_PC32 against symbol `bar' can not be used when
>   making a shared object; recompile with -fPIC
>
> due to failing lt_cv_prog_compiler_pic_works check on clang warnings.

Looking closely at the logs it uses full path to the compiler. I tried
same and the error is gone. Apparently, smth is broken on my box when
clang is used together with ccache.

  $ /usr/bin/clang -c -fPIC -DPIC -DPIC foo.c

  $ CCACHE_RECACHE=1 ccache /usr/bin/clang -c -fPIC -DPIC -DPIC foo.c
  clang: warning: argument unused during compilation: '-D PIC'
  clang: warning: argument unused during compilation: '-D PIC'

Sorry for the noise.