[vlc-devel] Heads up: VLC needs glibc 2.13 or later

Laurent Aimar fenrir at elivagar.org
Thu May 5 21:44:13 CEST 2011


On Thu, May 05, 2011 at 10:36:15PM +0300, Rémi Denis-Courmont wrote:
> 	Hello,
> Once again, a GNU/libc bug can kill VLC. This time, it is really freakin' 
> stupid: glibc < 2.13 marked the memmove() parameters as restricted pointers. 
> Nevermind that memmove() is The One Typical Example function that MUST NOT 
> have restricted pointers.
> This bug is known to cause VLC to crash at run-time if compiled with 
> optimization enabled, at least on GCC 4.6 or later. I do realize glibc 2.13 is 
> very recent and upgrading it is not easy. But there is nothing I can do about 
> that. As a work-around,  you can also fix your C headers by hand to remove the 
> bogus __restrict qualifiers from the memmove() declaration.
Maybe adding something like
in the gcc flags in the case of the bad glibc + gcc combination would
workaround the segfault(but may create performance issues).


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