gh-108765: Move export code from pyport.h to exports.h (#108855)

There is no API change, since pyport.h includes exports.h.

2 files changed, 72 insertions, 71 deletions

diff --git a/Include/exports.h b/Include/exports.h
index 59373c3..ce60121 100644
--- a/Include/exports.h
+++ b/Include/exports.h
@@ -1,6 +1,29 @@
 #ifndef Py_EXPORTS_H
 #define Py_EXPORTS_H
 
+/* Declarations for symbol visibility.
+
+  PyAPI_FUNC(type): Declares a public Python API function and return type
+  PyAPI_DATA(type): Declares public Python data and its type
+  PyMODINIT_FUNC:   A Python module init function.  If these functions are
+                    inside the Python core, they are private to the core.
+                    If in an extension module, it may be declared with
+                    external linkage depending on the platform.
+
+  As a number of platforms support/require "__declspec(dllimport/dllexport)",
+  we support a HAVE_DECLSPEC_DLL macro to save duplication.
+*/
+
+/*
+  All windows ports, except cygwin, are handled in PC/pyconfig.h.
+
+  Cygwin is the only other autoconf platform requiring special
+  linkage handling and it uses __declspec().
+*/
+#if defined(__CYGWIN__)
+#       define HAVE_DECLSPEC_DLL
+#endif
+
 #if defined(_WIN32) || defined(__CYGWIN__)
     #if defined(Py_ENABLE_SHARED)
         #define Py_IMPORTED_SYMBOL __declspec(dllimport)
@@ -33,4 +56,53 @@
     #endif
 #endif
 
+/* only get special linkage if built as shared or platform is Cygwin */
+#if defined(Py_ENABLE_SHARED) || defined(__CYGWIN__)
+#       if defined(HAVE_DECLSPEC_DLL)
+#               if defined(Py_BUILD_CORE) && !defined(Py_BUILD_CORE_MODULE)
+#                       define PyAPI_FUNC(RTYPE) Py_EXPORTED_SYMBOL RTYPE
+#                       define PyAPI_DATA(RTYPE) extern Py_EXPORTED_SYMBOL RTYPE
+        /* module init functions inside the core need no external linkage */
+        /* except for Cygwin to handle embedding */
+#                       if defined(__CYGWIN__)
+#                               define PyMODINIT_FUNC Py_EXPORTED_SYMBOL PyObject*
+#                       else /* __CYGWIN__ */
+#                               define PyMODINIT_FUNC PyObject*
+#                       endif /* __CYGWIN__ */
+#               else /* Py_BUILD_CORE */
+        /* Building an extension module, or an embedded situation */
+        /* public Python functions and data are imported */
+        /* Under Cygwin, auto-import functions to prevent compilation */
+        /* failures similar to those described at the bottom of 4.1: */
+        /* http://docs.python.org/extending/windows.html#a-cookbook-approach */
+#                       if !defined(__CYGWIN__)
+#                               define PyAPI_FUNC(RTYPE) Py_IMPORTED_SYMBOL RTYPE
+#                       endif /* !__CYGWIN__ */
+#                       define PyAPI_DATA(RTYPE) extern Py_IMPORTED_SYMBOL RTYPE
+        /* module init functions outside the core must be exported */
+#                       if defined(__cplusplus)
+#                               define PyMODINIT_FUNC extern "C" Py_EXPORTED_SYMBOL PyObject*
+#                       else /* __cplusplus */
+#                               define PyMODINIT_FUNC Py_EXPORTED_SYMBOL PyObject*
+#                       endif /* __cplusplus */
+#               endif /* Py_BUILD_CORE */
+#       endif /* HAVE_DECLSPEC_DLL */
+#endif /* Py_ENABLE_SHARED */
+
+/* If no external linkage macros defined by now, create defaults */
+#ifndef PyAPI_FUNC
+#       define PyAPI_FUNC(RTYPE) Py_EXPORTED_SYMBOL RTYPE
+#endif
+#ifndef PyAPI_DATA
+#       define PyAPI_DATA(RTYPE) extern Py_EXPORTED_SYMBOL RTYPE
+#endif
+#ifndef PyMODINIT_FUNC
+#       if defined(__cplusplus)
+#               define PyMODINIT_FUNC extern "C" Py_EXPORTED_SYMBOL PyObject*
+#       else /* __cplusplus */
+#               define PyMODINIT_FUNC Py_EXPORTED_SYMBOL PyObject*
+#       endif /* __cplusplus */
+#endif
+
+
 #endif /* Py_EXPORTS_H */
diff --git a/Include/pyport.h b/Include/pyport.h
index 4a21a44..4b6858b 100644
--- a/Include/pyport.h
+++ b/Include/pyport.h
@@ -355,79 +355,8 @@ extern "C" {
 #  define Py_NO_INLINE
 #endif
 
-/* Declarations for symbol visibility.
-
-  PyAPI_FUNC(type): Declares a public Python API function and return type
-  PyAPI_DATA(type): Declares public Python data and its type
-  PyMODINIT_FUNC:   A Python module init function.  If these functions are
-                    inside the Python core, they are private to the core.
-                    If in an extension module, it may be declared with
-                    external linkage depending on the platform.
-
-  As a number of platforms support/require "__declspec(dllimport/dllexport)",
-  we support a HAVE_DECLSPEC_DLL macro to save duplication.
-*/
-
-/*
-  All windows ports, except cygwin, are handled in PC/pyconfig.h.
-
-  Cygwin is the only other autoconf platform requiring special
-  linkage handling and it uses __declspec().
-*/
-#if defined(__CYGWIN__)
-#       define HAVE_DECLSPEC_DLL
-#endif
-
 #include "exports.h"
 
-/* only get special linkage if built as shared or platform is Cygwin */
-#if defined(Py_ENABLE_SHARED) || defined(__CYGWIN__)
-#       if defined(HAVE_DECLSPEC_DLL)
-#               if defined(Py_BUILD_CORE) && !defined(Py_BUILD_CORE_MODULE)
-#                       define PyAPI_FUNC(RTYPE) Py_EXPORTED_SYMBOL RTYPE
-#                       define PyAPI_DATA(RTYPE) extern Py_EXPORTED_SYMBOL RTYPE
-        /* module init functions inside the core need no external linkage */
-        /* except for Cygwin to handle embedding */
-#                       if defined(__CYGWIN__)
-#                               define PyMODINIT_FUNC Py_EXPORTED_SYMBOL PyObject*
-#                       else /* __CYGWIN__ */
-#                               define PyMODINIT_FUNC PyObject*
-#                       endif /* __CYGWIN__ */
-#               else /* Py_BUILD_CORE */
-        /* Building an extension module, or an embedded situation */
-        /* public Python functions and data are imported */
-        /* Under Cygwin, auto-import functions to prevent compilation */
-        /* failures similar to those described at the bottom of 4.1: */
-        /* http://docs.python.org/extending/windows.html#a-cookbook-approach */
-#                       if !defined(__CYGWIN__)
-#                               define PyAPI_FUNC(RTYPE) Py_IMPORTED_SYMBOL RTYPE
-#                       endif /* !__CYGWIN__ */
-#                       define PyAPI_DATA(RTYPE) extern Py_IMPORTED_SYMBOL RTYPE
-        /* module init functions outside the core must be exported */
-#                       if defined(__cplusplus)
-#                               define PyMODINIT_FUNC extern "C" Py_EXPORTED_SYMBOL PyObject*
-#                       else /* __cplusplus */
-#                               define PyMODINIT_FUNC Py_EXPORTED_SYMBOL PyObject*
-#                       endif /* __cplusplus */
-#               endif /* Py_BUILD_CORE */
-#       endif /* HAVE_DECLSPEC_DLL */
-#endif /* Py_ENABLE_SHARED */
-
-/* If no external linkage macros defined by now, create defaults */
-#ifndef PyAPI_FUNC
-#       define PyAPI_FUNC(RTYPE) Py_EXPORTED_SYMBOL RTYPE
-#endif
-#ifndef PyAPI_DATA
-#       define PyAPI_DATA(RTYPE) extern Py_EXPORTED_SYMBOL RTYPE
-#endif
-#ifndef PyMODINIT_FUNC
-#       if defined(__cplusplus)
-#               define PyMODINIT_FUNC extern "C" Py_EXPORTED_SYMBOL PyObject*
-#       else /* __cplusplus */
-#               define PyMODINIT_FUNC Py_EXPORTED_SYMBOL PyObject*
-#       endif /* __cplusplus */
-#endif
-
 /* limits.h constants that may be missing */
 
 #ifndef INT_MAX