http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52592
Bug #: 52592
Summary: mplayer compilation failure with undefined reference
to `__builtin_iround'
Classification: Unclassified
Product: gcc
Version: 4.7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: o...@ojab.ru
MPlayer build fails with gcc-4.7.0rc2 (see
http://bugzilla.mplayerhq.hu/show_bug.cgi?id=2047 ):
gcc -o mencoder mencoder.o parser-mecmd.o … -lfribidi -lass -lz -lbz2 -lmad
-lvpx -lpthread -ldl -rdynamic -lmp3lame
ffmpeg/libavcodec/libavcodec.a(ffv1.o): In function `encode_init':
ffv1.c:(.text.unlikely+0x16a1): 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':
ffv1.c:(.text.unlikely+0x16a1): undefined reference to `__builtin_iround'
collect2: error: ld returned 1 exit status
make: *** [mplayer] Error 1
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, I think that it can be gcc bug.
Please tell me what additional info is needed.
