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authorAdhemerval Zanella <adhemerval.zanella@linaro.org>2022-11-02 11:55:57 -0300
committerAdhemerval Zanella <adhemerval.zanella@linaro.org>2022-11-07 10:40:17 -0300
commit596183a1eed0699be96bdcd495ab1b497370afda (patch)
treebdf392139f9162cf9bb0c572248d139920d79307 /sysdeps
parentd1d0162e50afe7fa1e2fc4a901eb411db48acd7b (diff)
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Rewrite find_cxx_header config configure.ac
With clang if the main file is <stdin>, the first non-main-file
dependency is not listed in the -MP output.  Although it was fixed
on clang-16 [1], this change adds portability for older version.

[1] https://github.com/llvm/llvm-project/commit/ff9576f74514b836e1ba0268409a2ecb919d7118

Reviewed-by: Fangrui Song <maskray@google.com>
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