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FindThreads: Add pthread_cancel to program to test for pthreads in libc

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When using ThreadSanitizer our existing CMAKE_HAVE_LIBC_PTHREAD test
program links using symbols from the tsan library.  Among the symbols
not provided by that library, `pthread_cancel()` seems to be the less
risky symbol to add to the check.

Fixes: #19981
This commit is contained in:
Cristian Morales Vega
2019-11-16 04:27:14 +00:00
committed by Brad King
parent 25b7456f0e
commit b328cbaadb
1 changed files with 1 additions and 0 deletions
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Modules/FindThreads.cmake
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@@ -63,6 +63,7 @@ int main(void)
pthread_t thread;
pthread_create(&thread, NULL, test_func, NULL);
pthread_detach(thread);
pthread_cancel(thread);
pthread_join(thread, NULL);
pthread_atfork(NULL, NULL, NULL);
pthread_exit(NULL);