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Fix CHECK_(C|CXX)_COMPILER_FLAG for Clang (#12394) 

This compiler warns and returns 0 for unrecognized flags.  We fix the
compiler flag check macros by looking for a warning in the output.
This commit is contained in:
Brad King 2011-08-08 12:53:17 -04:00
parent 0e28009184
commit ed6be501de
2 changed files with 2 additions and 0 deletions
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1
Modules/CheckCCompilerFlag.cmake
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@ -30,6 +30,7 @@ MACRO (CHECK_C_COMPILER_FLAG _FLAG _RESULT)
FAIL_REGEX "warning: command line option .* is valid for .* but not for C" FAIL_REGEX "warning: command line option .* is valid for .* but not for C"
# Apple gcc # Apple gcc
FAIL_REGEX "unrecognized .*option" # GNU FAIL_REGEX "unrecognized .*option" # GNU
FAIL_REGEX "unknown .*option" # Clang
FAIL_REGEX "ignoring unknown option" # MSVC FAIL_REGEX "ignoring unknown option" # MSVC
FAIL_REGEX "warning D9002" # MSVC, any lang FAIL_REGEX "warning D9002" # MSVC, any lang
FAIL_REGEX "[Uu]nknown option" # HP FAIL_REGEX "[Uu]nknown option" # HP

1
Modules/CheckCXXCompilerFlag.cmake
View File

@ -28,6 +28,7 @@ MACRO (CHECK_CXX_COMPILER_FLAG _FLAG _RESULT)
CHECK_CXX_SOURCE_COMPILES("int main() { return 0;}" ${_RESULT} CHECK_CXX_SOURCE_COMPILES("int main() { return 0;}" ${_RESULT}
# Some compilers do not fail with a bad flag # Some compilers do not fail with a bad flag
FAIL_REGEX "unrecognized .*option" # GNU FAIL_REGEX "unrecognized .*option" # GNU
FAIL_REGEX "unknown .*option" # Clang
FAIL_REGEX "ignoring unknown option" # MSVC FAIL_REGEX "ignoring unknown option" # MSVC
FAIL_REGEX "warning D9002" # MSVC, any lang FAIL_REGEX "warning D9002" # MSVC, any lang
FAIL_REGEX "[Uu]nknown option" # HP FAIL_REGEX "[Uu]nknown option" # HP