[Pixman] [PATCH] Check for NEON using a signal handler to catch SIGILL

Soeren Sandmann sandmann at daimi.au.dk
Tue Dec 14 03:08:38 PST 2010

Mike McCormack <mj.mccormack at samsung.com> writes:

> Pixman already uses the SIGILL mechanism elsewhere in the same file.

FWIW, the SIGILL mechanism for PowerPC is only used if the operating
system is neither OS X, OpenBSD, or Linux. 

It used to be used on Linux, but it caused some kind of a infinite
loop in the build system at Red Hat, where it kept generating and
handling SIGILL, so David Woodhouse changed it to parse
/proc/auxv. See cd2a79ab81045aa7e35bc901081e57

I don't know whether the SIGILL handling in pixman was buggy, or
whether there was some other underlying reason.


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