Make sure <execinfo.h> is actually included when needed.
configure only defines HAVE_BACKTRACE, not HAVE_EXECINFO_H. This could cause problems on platforms where the size of a pointer is greater than that of an integer, see http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=363218 .
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@ -1255,12 +1255,8 @@ xf86InterceptSigIll(void (*sigillhandler)(void))
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xf86SigIllHandler = sigillhandler;
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}
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#ifdef HAVE_EXECINFO_H
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#define HAVE_BACKTRACE
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#include <execinfo.h>
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#endif
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#ifdef HAVE_BACKTRACE
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#include <execinfo.h>
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static __inline__ void xorg_backtrace(void)
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{
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