bpo-37415: Fix stdatomic.h header check for ICC compiler (GH-16717)
Fix stdatomic.h header check for ICC compiler: the ICC implementation
lacks atomic_uintptr_t type which is needed by Python.
Test:
* atomic_int and atomic_uintptr_t types
* atomic_load_explicit() and atomic_store_explicit()
* memory_order_relaxed and memory_order_seq_cst constants
But don't test ATOMIC_VAR_INIT(): it's not used in Python.
(cherry picked from commit 028f7349a0f6eaea0fec31becb587fcdf6e3cb28)
Co-authored-by: Victor Stinner <vstinner@python.org>
diff --git a/configure.ac b/configure.ac
index a189d42..7051dc1 100644
--- a/configure.ac
+++ b/configure.ac
@@ -5403,9 +5403,12 @@
[
AC_LANG_SOURCE([[
#include <stdatomic.h>
- atomic_int value = ATOMIC_VAR_INIT(1);
+ atomic_int int_var;
+ atomic_uintptr_t uintptr_var;
int main() {
- int loaded_value = atomic_load(&value);
+ atomic_store_explicit(&int_var, 5, memory_order_relaxed);
+ atomic_store_explicit(&uintptr_var, 0, memory_order_relaxed);
+ int loaded_value = atomic_load_explicit(&int_var, memory_order_seq_cst);
return 0;
}
]])
@@ -5415,7 +5418,7 @@
if test "$have_stdatomic_h" = yes; then
AC_DEFINE(HAVE_STD_ATOMIC, 1,
- [Has stdatomic.h with atomic_int])
+ [Has stdatomic.h with atomic_int and atomic_uintptr_t])
fi
# Check for GCC >= 4.7 __atomic builtins