CPython 3.9b5 fix

2 files changed, 9 insertions, 0 deletions

diff --git a/testing/cffi0/test_verify.py b/testing/cffi0/test_verify.py
index 3a1c0b9..65833b8 100644
--- a/testing/cffi0/test_verify.py
+++ b/testing/cffi0/test_verify.py
@@ -97,6 +97,11 @@ def _Wconversion(cdef, source, **kargs):
     return lib
 
 def test_Wconversion_unsigned():
+    if '-Wno-sign-conversion' in extra_compile_args:
+        # CPython 3.9 needs -Wno-sign-conversion, so we can't meaningfully
+        # run this test
+        py.test.skip("cannot test this on CPython >= 3.9")
+    #
     _Wconversion("unsigned foo(void);",
                  "int foo(void) { return -1;}")
 
diff --git a/testing/support.py b/testing/support.py
index de8131c..282224d 100644
--- a/testing/support.py
+++ b/testing/support.py
@@ -112,3 +112,7 @@ else:
         extra_compile_args = ['-Werror', '-Wall', '-Wextra', '-Wconversion',
                               '-Wno-unused-parameter',
                               '-Wno-unreachable-code']
+    # CPython 3.9 added in its headers something that triggers this warning,
+    # so we need to disable it
+    if sys.version_info >= (3, 9):
+        extra_compile_args.append('-Wno-sign-conversion')