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author | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2022-11-02 11:55:57 -0300 |
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committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2022-11-07 10:40:17 -0300 |
commit | 596183a1eed0699be96bdcd495ab1b497370afda (patch) | |
tree | bdf392139f9162cf9bb0c572248d139920d79307 /configure | |
parent | d1d0162e50afe7fa1e2fc4a901eb411db48acd7b (diff) | |
download | glibc-596183a1eed0699be96bdcd495ab1b497370afda.tar.gz glibc-596183a1eed0699be96bdcd495ab1b497370afda.tar.xz glibc-596183a1eed0699be96bdcd495ab1b497370afda.zip |
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>
Diffstat (limited to 'configure')
-rwxr-xr-x | configure | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/configure b/configure index fc3d7842de..cb0996d59e 100755 --- a/configure +++ b/configure @@ -5669,8 +5669,8 @@ fi # copy of those headers in Makerules. if test -n "$CXX"; then find_cxx_header () { - echo "#include <$1>" | $CXX -M -MP -x c++ - 2>/dev/null \ - | sed -n "\,$1:,{s/:\$//;p}" + echo "#include <$1>" | $CXX -H -fsyntax-only -x c++ - 2>&1 \ + | $AWK '$1 == "."{print $2}' } CXX_CSTDLIB_HEADER="$(find_cxx_header cstdlib)" CXX_CMATH_HEADER="$(find_cxx_header cmath)" |