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python3Packages.cffi: fix build with newer clang
cffi uses a technique to find the offset of a struct that causes newer
clangs to issue a warning regarding null pointer subtraction. This
patch silences the warning, so cffi can build.
+17
+11
pkgs/development/python-modules/cffi/clang-pointer-substraction-warning.diff
+11
pkgs/development/python-modules/cffi/clang-pointer-substraction-warning.diff
···
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+
diff -r c649a735cf82 testing/support.py
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--- a/testing/support.py Thu Feb 23 05:42:01 2023 +0100
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+++ b/testing/support.py Sat May 20 21:46:56 2023 -0400
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@@ -112,6 +112,7 @@
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'-Wno-unreachable-code']
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# special things for clang
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extra_compile_args.append('-Qunused-arguments')
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+ extra_compile_args.append('-Wno-null-pointer-subtraction')
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else:
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# assume a standard gcc
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extra_compile_args = ['-Werror', '-Wall', '-Wextra', '-Wconversion',
+6
pkgs/development/python-modules/cffi/default.nix
+6
pkgs/development/python-modules/cffi/default.nix
···
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];
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hash = "sha256-+2daRTvxtyrCPimOEAmVbiVm1Bso9hxGbaAbd03E+ws=";
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})
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] ++ lib.optionals (stdenv.cc.isClang && lib.versionAtLeast (lib.getVersion stdenv.cc) "13") [
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# -Wnull-pointer-subtraction is enabled with -Wextra. Suppress it to allow the following tests
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# to run and pass when cffi is built with newer versions of clang:
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# - testing/cffi1/test_verify1.py::test_enum_usage
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# - testing/cffi1/test_verify1.py::test_named_pointer_as_argument
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+
./clang-pointer-substraction-warning.diff
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] ++ lib.optionals (pythonAtLeast "3.11") [
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# Fix test that failed because python seems to have changed the exception format in the
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# final release. This patch should be included in the next version and can be removed when