bpo-37437: Pass -Wno-unreachable-code when compiling expat. (GH-14470)

(cherry picked from commit 95da310078a9364bae9ab3f2ad9c71e34306a70c)

Co-authored-by: Benjamin Peterson <benjamin@python.org>

diff --git a/setup.py b/setup.py
index 5e0cd024301090db5cb88016402911d9d63ac46c..88cff6164d712b1e434d7fc7290121e9001b2d55 100644 (file)
--- a/setup.py
+++ b/setup.py
@@ -1562,9 +1562,9 @@ class PyBuildExt(build_ext):
 
             cc = sysconfig.get_config_var('CC').split()[0]
             ret = os.system(
-                      '"%s" -Werror -Wimplicit-fallthrough -E -xc /dev/null >/dev/null 2>&1' % cc)
+                      '"%s" -Werror -Wno-unreachable-code -E -xc /dev/null >/dev/null 2>&1' % cc)
             if ret >> 8 == 0:
-                extra_compile_args.append('-Wno-implicit-fallthrough')
+                extra_compile_args.append('-Wno-unreachable-code')
 
         exts.append(Extension('pyexpat',
                               define_macros = define_macros,