bpo-26317: Support OBJC and OBJCXX configure command line variables (GH-20176)

Add support to the configure script for OBJC and OBJCXX command line options so that the macOS builds can use the clang compiler for the macOS-specific Objective C source files. This allows third-party compilers, like GNU gcc, to be used to build the rest of the project since some of the Objective C system header files are not compilable by GNU gcc.

Co-authored-by: Jeffrey Kintscher <websurfer@surf2c.net>
Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu>

1 files changed, 3 insertions, 2 deletions

diff --git a/setup.py b/setup.py
index a220f366..9b2cc7a 100644
--- a/setup.py
+++ b/setup.py
@@ -1583,10 +1583,11 @@ class PyBuildExt(build_ext):
             self.missing.append('ossaudiodev')
 
         if MACOS:
-            self.add(Extension('_scproxy', ['_scproxy.c'],
+            self.add(Extension('_scproxy', [],
                                extra_link_args=[
                                    '-framework', 'SystemConfiguration',
-                                   '-framework', 'CoreFoundation']))
+                                   '-framework', 'CoreFoundation'],
+                               extra_objects=['Modules/_scproxy.o']))
 
     def detect_compress_exts(self):
         # Andrew Kuchling's zlib module.  Note that some versions of zlib