Re: How to get autoconf to respect CC="gcc -std=c89"?

Thanks for looking into this.

Some comments.

This doesn't let you say "I want either c89 or c99, but not c11".

> +  m4_ifdef([_AC_C_STANDARD_VERSION_LIST],
> +    [m4_fatal([AC_PROG_C_STANDARD_VERSION should only be used once], 1)])

Why have this check?

How about something simpler, like replacing this:

m4_map([_AC_PROG_CC_STDC_EDITION_TRY], [[11], [99], [89]])])

with this:

m4_map([_AC_PROG_CC_STDC_EDITION_TRY],
   [m4_default([_AC_C_STANDARD_VERSION_LIST],
      [[11], [99], [89]])])

and not bothering to check for allowed or duplicated version lists?