py311: Revert static_assert undefined fix GH-94766

This fix python/cpython#103282 actually
breaks things using GCC 4.6.4 when enforcing c99.

Author: th0ma7

cross/python311/patches/88f6281/001-revert-static_assert_undefined-fix-GH-94766.patch

@@ -0,0 +1,39 @@
+--- Include/pymacro.h-orig	2023-06-06 22:00:27.000000000 +0000
++++ Include/pymacro.h	2023-07-03 19:36:57.974496974 +0000
+@@ -3,23 +3,20 @@
+ 
+ // gh-91782: On FreeBSD 12, if the _POSIX_C_SOURCE and _XOPEN_SOURCE macros are
+ // defined, <sys/cdefs.h> disables C11 support and <assert.h> does not define
+-// the static_assert() macro.
++// the static_assert() macro. Define the static_assert() macro in Python until
++// <sys/cdefs.h> suports C11:
+ // https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=255290
+-//
+-// macOS <= 10.10 doesn't define static_assert in assert.h at all despite
+-// having C11 compiler support.
+-//
+-// static_assert is defined in glibc from version 2.16. Compiler support for
+-// the C11 _Static_assert keyword is in gcc >= 4.6.
+-//
+-// MSVC makes static_assert a keyword in C11-17, contrary to the standards.
+-//
+-// In C++11 and C2x, static_assert is a keyword, redefining is undefined
+-// behaviour. So only define if building as C (if __STDC_VERSION__ is defined),
+-// not C++, and only for C11-17.
+-#if !defined(static_assert) && (defined(__GNUC__) || defined(__clang__)) \
+-     && defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L \
+-     && __STDC_VERSION__ <= 201710L
++#if defined(__FreeBSD__) && !defined(static_assert)
++#  define static_assert _Static_assert
++#endif
++
++// static_assert is defined in glibc from version 2.16. Before it requires
++// compiler support (gcc >= 4.6) and is called _Static_assert.
++// In C++ 11 static_assert is a keyword, redefining is undefined behaviour.
++#if (defined(__GLIBC__) \
++     && (__GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ <= 16)) \
++     && !(defined(__cplusplus) && __cplusplus >= 201103L) \
++     && !defined(static_assert))
+ #  define static_assert _Static_assert
+ #endif
+