Precise macro value type #3323
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Precise macro value type #3323
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dingxiangfei2009
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Apparently the clang fallback has race condition. If I set thread number to 1, we don't have truncated output anymore. |
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I have a theory about the test setup leading to the racing. The test setup uses the fallback translation unit backed by a file, which is located in Update: yes, the two tests are racing on writing into the precompiled header. |
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Upon activating the `--macro-const-use-ctypes` flag, `bindgen` should generate bindings with precise type resolution to the exact C types. This flag implies `--clang-macro-fallback` as its pre-requisite. Signed-off-by: Xiangfei Ding <dingxiangfei2009@protonmail.ch>
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I am holding off |
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r? @emilio 🙏 |
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Fix #923.
Fix #3200. This is due to a fallout from how
libclangtype would be processed with this patch.This patch introduce a new generator flag
--macro-const-use-ctypes, which resolves the macro definition expression to a precise type advised by Clang if activated.A macro expansion result adapter is introduced to maintain compatibility with
cexpr, which has a limited capacity to resolve to a precise C type.There is a change to the testing code because up to this point our tests, which can be executed concurrently, use the same path to the precomputed headers. Since this patch introduces a second test that relies on
libclangmacro fallback, the precompiled headers from the two different tests would overwrite each other. The new addition is that the backing files are now temporarily stored at different directories named after the header files under tests.