Issue #4366: Fix building extensions on all platforms when --enable-shared is used.

Lib/distutils/command/build_ext.py

@@ -242,11 +242,10 @@ class build_ext(Command):
                 # building python standard extensions
                 self.library_dirs.append('.')
 
-        # for extensions under Linux or Solaris with a shared Python library,
+        # For building extensions with a shared Python library,
         # Python's library directory must be appended to library_dirs
-        sysconfig.get_config_var('Py_ENABLE_SHARED')
-        if (sys.platform.startswith(('linux', 'gnu', 'sunos'))
-            and sysconfig.get_config_var('Py_ENABLE_SHARED')):
+        # See Issues: #1600860, #4366
+        if (sysconfig.get_config_var('Py_ENABLE_SHARED')):
             if sys.executable.startswith(os.path.join(sys.exec_prefix, "bin")):
                 # building third party extensions
                 self.library_dirs.append(sysconfig.get_config_var('LIBDIR'))

Misc/NEWS

@@ -15,6 +15,9 @@ Core and Builtins
 Library
 -------
 
+- Issue #4366: Fix building extensions on all platforms when --enable-shared
+  is used.
+
 - Issue #18950: Fix miscellaneous bugs in the sunau module.
   Au_read.readframes() now updates current file position and reads correct
   number of frames from multichannel stream.  Au_write.writeframesraw() now