svn trunk does not built with gcc-4.7 prereleases

[belegdol+mplayer@…]

Hi,

I have recently tried to update mplayer rpm package in RPM fusion to the latest SVN. Unfortunately, it does not build with gcc-4.7 prereleases Fedora switched to. I originally reported this to ffmpeg [1], but the bug turned out to belong to mplayer:

ffmpeg/libavcodec/libavcodec.a(ffv1.o): In function `encode_init':
/builddir/build/BUILD/mplayer-export-2012-02-26/ffmpeg/libavcodec/ffv1.c:1041: undefined reference to `builtin_iround'
collect2: error: ld returned 1 exit status
make: * [mencoder] Error 1
make: * Waiting for unfinished jobs....
ffmpeg/libavcodec/libavcodec.a(ffv1.o): In function `encode_init':
/builddir/build/BUILD/mplayer-export-2012-02-26/ffmpeg/libavcodec/ffv1.c:1041: undefined reference to `builtin_iround'
collect2: error: ld returned 1 exit status
make: * [mplayer] Error 1

Full build log is attached.

[1] ​https://ffmpeg.org/trac/ffmpeg/ticket/1024

[belegdol+mplayer@…]

full build log

[compn]

could you try gcc 4.7 from gcc and not distro version?

(yes, we are playing hot potato with this bug)

[belegdol+mplayer@…]

Hmm, I don't know. I need to remind myself how does one bootstrap a compiler. I'll report back once I figure it out.

[ojab@…]

The same error with
gcc (GCC) 4.7.0 20120302 (prerelease)
on LFS system (so gcc was built from source).

[ojab@…]

(to be exact):
gcc -o mplayer command.o m_property.o mixer.o mp_fifo.o …
ffmpeg/libavcodec/libavcodec.a(ffv1.o): In function `encode_init':
ffv1.c:(.text.unlikely+0x1679): undefined reference to `builtin_iround'
collect2: error: ld returned 1 exit status
make: * [mplayer] Error 1

[ojab@…]

Looks like related to ​http://gcc.gnu.org/ml/gcc-patches/2011-08/msg01001.html and

Please document those in doc/extend.texi and make sure they do not leak into the global namespace as ifloor, etc., but are only available as builtin_ifloor, etc..

from ​http://gcc.gnu.org/ml/gcc-patches/2011-08/msg01003.html

mplayer builds fine with CFLAGS=-ffast-math, looks like gcc bug (I'm not a programmer, though).

[ojab@…]

Filled gcc bug ​http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52592

[ojab@…]

Fixed in GCC.