Re: Testing for unknown flags in different compilers

[Carsten Heinrici]

Hi Julie



>>> I have been working on a changes whereby an autoconf
>>> user can invoke a macro like
>>>
>>> AC_WARN_ADD([-Wextra])

The point is the portability. Your flags (-Wextra) depend on the actual 
compiler. This js against the philosophy behind autoconf, which tries to 
abstract from it.

If wanted, a developper always can add additional specific compiler flags 
during runtime by specifying them via CFLAGS on command line.

What would be required is a general macro AC_EXTRA_WARNINGS without arguments 
which could resolve to the actually current arguments of the tool.

Carsten