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 028f7349a0
)
Co-authored-by: Victor Stinner <vstinner@python.org>
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@ -0,0 +1,2 @@
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Fix stdatomic.h header check for ICC compiler: the ICC implementation lacks
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atomic_uintptr_t type which is needed by Python.
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@ -16849,9 +16849,12 @@ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
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#include <stdatomic.h>
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atomic_int value = ATOMIC_VAR_INIT(1);
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atomic_int int_var;
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atomic_uintptr_t uintptr_var;
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int main() {
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int loaded_value = atomic_load(&value);
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atomic_store_explicit(&int_var, 5, memory_order_relaxed);
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atomic_store_explicit(&uintptr_var, 0, memory_order_relaxed);
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int loaded_value = atomic_load_explicit(&int_var, memory_order_seq_cst);
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return 0;
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}
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@ -5492,9 +5492,12 @@ AC_LINK_IFELSE(
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[
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AC_LANG_SOURCE([[
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#include <stdatomic.h>
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atomic_int value = ATOMIC_VAR_INIT(1);
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atomic_int int_var;
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atomic_uintptr_t uintptr_var;
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int main() {
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int loaded_value = atomic_load(&value);
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atomic_store_explicit(&int_var, 5, memory_order_relaxed);
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atomic_store_explicit(&uintptr_var, 0, memory_order_relaxed);
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int loaded_value = atomic_load_explicit(&int_var, memory_order_seq_cst);
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return 0;
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}
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]])
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@ -5504,7 +5507,7 @@ AC_MSG_RESULT($have_stdatomic_h)
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if test "$have_stdatomic_h" = yes; then
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AC_DEFINE(HAVE_STD_ATOMIC, 1,
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[Has stdatomic.h with atomic_int])
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[Has stdatomic.h with atomic_int and atomic_uintptr_t])
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fi
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# Check for GCC >= 4.7 __atomic builtins
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@ -963,7 +963,7 @@
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/* Define to 1 if you have the <stdlib.h> header file. */
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#undef HAVE_STDLIB_H
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/* Has stdatomic.h with atomic_int */
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/* Has stdatomic.h with atomic_int and atomic_uintptr_t */
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#undef HAVE_STD_ATOMIC
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/* Define to 1 if you have the `strdup' function. */
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