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Re: detecting when an option is not available
Vincent Torri <vtorri@univ-evry.fr> writes:
> I would like to know if there is a way to know if a warning option
> like -Wno-initializer-overrides is supported or not by gcc. My purpose
> is to write an m4 macro that checks if an option is supported or not
> by a compiler.
This question is not appropriate for the mailing list gcc@gcc.gnu.org,
which is for the development of GCC itself. It would be appropriate on
the mailing list gcc-help@gcc.gnu.org. Please take any followups to
gcc-help. Thanks.
The trick to find out if a -Wno- option is supported is to force a
compiler error. E.g.,
echo xx | gcc -Wno-initializer-overrides -x c - -c 2>&1 | grep 'unrecognized command line option'
Ian