C11 atomics allow direct access. This check should prevent the usage
of bogus stdatomic.h available on some systems.
Signed-off-by: James Almer <jamrial@gmail.com>
# it seems there are versions of clang in some distros that try to use the
# gcc headers, which explodes for stdatomic
# so we also check that atomics actually work here
# it seems there are versions of clang in some distros that try to use the
# gcc headers, which explodes for stdatomic
# so we also check that atomics actually work here
-check_builtin stdatomic stdatomic.h "atomic_int foo, bar = ATOMIC_VAR_INIT(-1); atomic_store(&foo, 0)"
+check_builtin stdatomic stdatomic.h "atomic_int foo, bar = ATOMIC_VAR_INIT(-1); atomic_store(&foo, 0); foo += bar"
check_lib advapi32 "windows.h" RegCloseKey -ladvapi32
check_lib ole32 "windows.h" CoTaskMemFree -lole32
check_lib advapi32 "windows.h" RegCloseKey -ladvapi32
check_lib ole32 "windows.h" CoTaskMemFree -lole32