llvm/cxx_flag_check.m4 at 15f2c50e632667e391a334e8b6026bc17556a276 - llvm - Gitea: Git with a cup of tea

RPCSX/llvm

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Richard Smith d31bd24b40 configure: when performing a compiler feature test for a -Wno-foo flag, attempt

to use -Wfoo instead of -Wno-foo. This works around a bug in some versions of
gcc, where it will silently accept an unknown -Wno-foo option, but will
generate an error for a compile which uses -Wno-foo if that compile also
triggers any warnings.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174770 91177308-0d34-0410-b5e6-96231b3b80d8

2013-02-08 22:55:10 +00:00

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	`AC_DEFUN([CXX_FLAG_CHECK],`
	[AC_SUBST($1, `$CXX -Werror patsubst($2, [^-Wno-], [-W]) -fsyntax-only -xc /dev/null 2>/dev/null && echo $2`)])