Patch 1471925 - Weak linking support for OSX

This patch causes several symbols in the socket and posix module to be weakly
linked on OSX and disables usage of ftime on OSX. These changes make it possible
to use a binary build on OSX 10.4 on a 10.3 system.

1 files changed, 34 insertions, 2 deletions

diff --git a/Modules/socketmodule.c b/Modules/socketmodule.c
index c9dd4a3..39a0240 100644
--- a/Modules/socketmodule.c
+++ b/Modules/socketmodule.c
@@ -61,6 +61,15 @@ Local naming conventions:
 
 */
 
+#ifdef __APPLE__
+  /*
+   * inet_aton is not available on OSX 10.3, yet we want to use a binary
+   * that was build on 10.4 or later to work on that release, weak linking
+   * comes to the rescue.
+   */
+# pragma weak inet_aton
+#endif
+
 #include "Python.h"
 #include "structmember.h"
 
@@ -306,6 +315,11 @@ const char *inet_ntop(int af, const void *src, char *dst, socklen_t size);
    older releases don't have */
 #undef HAVE_GETADDRINFO
 #endif
+
+#ifdef HAVE_INET_ATON
+#define USE_INET_ATON_WEAKLINK
+#endif
+
 #endif
 
 /* I know this is a bad practice, but it is the easiest... */
@@ -3333,7 +3347,9 @@ socket_inet_aton(PyObject *self, PyObject *args)
 #endif
 #ifdef HAVE_INET_ATON
 	struct in_addr buf;
-#else
+#endif
+
+#if !defined(HAVE_INET_ATON) || defined(USE_INET_ATON_WEAKLINK)
 	/* Have to use inet_addr() instead */
 	unsigned long packed_addr;
 #endif
@@ -3344,6 +3360,10 @@ socket_inet_aton(PyObject *self, PyObject *args)
 
 
 #ifdef HAVE_INET_ATON
+
+#ifdef USE_INET_ATON_WEAKLINK
+    if (inet_aton != NULL) {
+#endif
 	if (inet_aton(ip_addr, &buf))
 		return PyString_FromStringAndSize((char *)(&buf),
 						  sizeof(buf));
@@ -3352,7 +3372,14 @@ socket_inet_aton(PyObject *self, PyObject *args)
 			"illegal IP address string passed to inet_aton");
 	return NULL;
 
-#else /* ! HAVE_INET_ATON */
+#ifdef USE_INET_ATON_WEAKLINK
+   } else {
+#endif
+
+#endif
+
+#if !defined(HAVE_INET_ATON) || defined(USE_INET_ATON_WEAKLINK)
+
 	/* special-case this address as inet_addr might return INADDR_NONE
 	 * for this */
 	if (strcmp(ip_addr, "255.255.255.255") == 0) {
@@ -3369,6 +3396,11 @@ socket_inet_aton(PyObject *self, PyObject *args)
 	}
 	return PyString_FromStringAndSize((char *) &packed_addr,
 					  sizeof(packed_addr));
+
+#ifdef USE_INET_ATON_WEAKLINK
+   }
+#endif
+
 #endif
 }