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There is a cyclic dependency between the headers <sys/ucontext.h> and <ucontext.h> when _XOPEN_SOURCE is defined to 500 or 600: <sys/ucontext.h> includes <signal.h> which includes <ucontext.h> which includes <sys/ucontext.h>. The effect is that you'll get a compiler error when including <sys/ucontext.h> due to ucontext_t begin undefined. I don't know how to fix that properly, a workaround is to include <ucontext.h> instead. Andreas. -- Andreas Schwab, SuSE Labs, schwab@suse.de SuSE Linux AG, Deutschherrnstr. 15-19, D-90429 Nürnberg Key fingerprint = 58CA 54C7 6D53 942B 1756 01D3 44D5 214B 8276 4ED5 "And now for something completely different."
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