MAINT: Fix some undef warnings

As noted by Chuck in numpygh-29138, there are some undef warnings that seem not nice
this should fix them.

The fact that `NPY_LONG`, etc. are not defined at macro expansion time is a bit
of a trap, maybe it would be nice to have CI fail for this...

Author: seberg

numpy/_core/src/_simd/_simd.c

@@ -88,7 +88,7 @@ PyMODINIT_FUNC PyInit__simd(void)
     NPY_MTARGETS_CONF_DISPATCH(NPY_CPU_HAVE, ATTACH_MODULE, MAKE_MSVC_HAPPY)
     NPY_MTARGETS_CONF_BASELINE(ATTACH_BASELINE_MODULE, MAKE_MSVC_HAPPY)
 
-#if Py_GIL_DISABLED
+#ifdef Py_GIL_DISABLED
     // signal this module supports running with the GIL disabled
     PyUnstable_Module_SetGIL(m, Py_MOD_GIL_NOT_USED);
 #endif

numpy/_core/src/multiarray/descriptor.c

@@ -2095,7 +2095,7 @@ static PyMemberDef arraydescr_members[] = {
     {"alignment",
         T_PYSSIZET, offsetof(PyArray_Descr, alignment), READONLY, NULL},
     {"flags",
-#if NPY_ULONGLONG == NPY_UINT64
+#if NPY_SIZEOF_LONGLONG == 8
         T_ULONGLONG, offsetof(PyArray_Descr, flags), READONLY, NULL},
 #else
     #error Assuming long long is 64bit, if not replace with getter function.

numpy/_core/src/umath/_operand_flag_tests.c

@@ -77,7 +77,7 @@ PyMODINIT_FUNC PyInit__operand_flag_tests(void)
     ((PyUFuncObject*)ufunc)->iter_flags = NPY_ITER_REDUCE_OK;
     PyModule_AddObject(m, "inplace_add", (PyObject*)ufunc);
 
-#if Py_GIL_DISABLED
+#ifdef Py_GIL_DISABLED
     // signal this module supports running with the GIL disabled
     PyUnstable_Module_SetGIL(m, Py_MOD_GIL_NOT_USED);
 #endif

numpy/_core/src/umath/_rational_tests.c

@@ -1355,7 +1355,7 @@ PyMODINIT_FUNC PyInit__rational_tests(void) {
     GCD_LCM_UFUNC(gcd,NPY_INT64,"greatest common denominator of two integers");
     GCD_LCM_UFUNC(lcm,NPY_INT64,"least common multiple of two integers");
 
-#if Py_GIL_DISABLED
+#ifdef Py_GIL_DISABLED
     // signal this module supports running with the GIL disabled
     PyUnstable_Module_SetGIL(m, Py_MOD_GIL_NOT_USED);
 #endif

numpy/_core/src/umath/_struct_ufunc_tests.c

@@ -157,7 +157,7 @@ PyMODINIT_FUNC PyInit__struct_ufunc_tests(void)
     PyDict_SetItemString(d, "add_triplet", add_triplet);
     Py_DECREF(add_triplet);
 
-#if Py_GIL_DISABLED
+#ifdef Py_GIL_DISABLED
     // signal this module supports running with the GIL disabled
     PyUnstable_Module_SetGIL(m, Py_MOD_GIL_NOT_USED);
 #endif

numpy/_core/src/umath/_umath_tests.c.src

@@ -944,7 +944,7 @@ PyMODINIT_FUNC PyInit__umath_tests(void) {
 
     // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 
-#if Py_GIL_DISABLED
+#ifdef Py_GIL_DISABLED
     // signal this module supports running with the GIL disabled
     PyUnstable_Module_SetGIL(m, Py_MOD_GIL_NOT_USED);
 #endif

numpy/_core/tests/examples/limited_api/limited_api_latest.c

@@ -1,11 +1,11 @@
-#if Py_LIMITED_API != PY_VERSION_HEX & 0xffff0000
-    # error "Py_LIMITED_API not defined to Python major+minor version"
-#endif
-
 #include <Python.h>
 #include <numpy/arrayobject.h>
 #include <numpy/ufuncobject.h>
 
+#if Py_LIMITED_API != PY_VERSION_HEX & 0xffff0000
+    # error "Py_LIMITED_API not defined to Python major+minor version"
+#endif
+
 static PyModuleDef moduledef = {
     .m_base = PyModuleDef_HEAD_INIT,
     .m_name = "limited_api_latest"

numpy/f2py/rules.py

@@ -286,7 +286,7 @@
 #initcommonhooks#
 #interface_usercode#
 
-#if Py_GIL_DISABLED
+#ifdef Py_GIL_DISABLED
     // signal whether this module supports running with the GIL disabled
     PyUnstable_Module_SetGIL(m , #gil_used#);
 #endif

numpy/f2py/tests/src/array_from_pyobj/wrapmodule.c

@@ -223,7 +223,7 @@ PyMODINIT_FUNC PyInit_test_array_from_pyobj_ext(void) {
   on_exit(f2py_report_on_exit,(void*)"array_from_pyobj.wrap.call");
 #endif
 
-#if Py_GIL_DISABLED
+#ifdef Py_GIL_DISABLED
     // signal whether this module supports running with the GIL disabled
     PyUnstable_Module_SetGIL(m, Py_MOD_GIL_NOT_USED);
 #endif