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On 15/04/2017 23:27, Daniel Santos wrote:
Recent versions of gcc are optimizing away the TLS buffer allocated in main, so we need to tell gcc that it's really used. --- winsup/utils/strace.cc | 2 ++ 1 file changed, 2 insertions(+) diff --git a/winsup/utils/strace.cc b/winsup/utils/strace.cc index beab67b90..1e581b4a4 100644 --- a/winsup/utils/strace.cc +++ b/winsup/utils/strace.cc @@ -1192,6 +1192,8 @@ main (int argc, char **argv) char buf[CYGTLS_PADSIZE]; memset (buf, 0, sizeof (buf)); + /* Prevent buf from being optimized away. */ + __asm__ __volatile__("" :: "m" (buf));
wouldn't adding volatile to the definition of buf be a better way to write this?
exit (main2 (argc, argv)); }
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