[Libav-user] ff_log2_tab defined multiple times in the fmpeg 1.1 libraries, bug or feature ??

Lars Hammarstrand lars.hammarstrand at gmail.com
Wed Feb 13 16:36:38 CET 2013

Hello, can someone please explain the reason (and how to cope with) that *
ff_log2_tab* is defined multiple times with *#include "libavutil/log2_tab.c*"
in the ffmpeg v1.1 libraries like libavcodec 54.91.102 and companions ??

This results in "duplicate symbols" while linking as listed below. To get
ride of the problem we need to delete the duplicated entries by hand with
"ar -d libxxx.a log2_tab.o" for all libraries but one, not a very smooth
solution. Will this behavior change in the future or do weed need to
automate a duplicate removal process while building the ffmpeg libraries
for XBMC?

Thanks in advance!
Regards, Lars.

"duplicate symbol _ff_log2_tab in:

duplicate symbol _ff_log2_tab in:

duplicate symbol _ff_log2_tab in:

ld: 3 duplicate symbols for architecture i386
clang: error: linker command failed with exit code 1 (use -v to see
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