2017-11-29 13:16:36 UTC
just found that my gcc 'gcc (SUSE Linux) 7.2.1 20171020 [gcc-7-branch revision
253932]' does not warn when using the negative form of unsupported warning
options. So all the configure tests for such options erroneously succeed, e.g:
gcc -Wno-bob test.c # works fine
gcc -Walice test.c # warns for unsupported compiler option
Maybe gcc bug or intended behaviour, maybe only unique to my version?