On 1/24/20, Christian Biesinger <cbiesinger@xxxxxxxxxx> wrote: > I noticed that autoconf has a macro to enable C99 (AC_PROG_CC_C99), > but apparently no such macro for C11 or C18. I was wondering if a > patch for that would be acceptable in principle or if this is missing > intentionally? In autoconf master, the AC_PROG_CC_C99 macro is deprecated and no longer recommended for use. AC_PROG_CC now tries to select the highest language revision supported by the compiler. Unfortunately, the improved AC_PROG_CC has not yet made it into an Autoconf release, primarily due to a lack of volunteers willing to invest the time to help with the process. (Autoconf does not detect C18, but note that other than incorporating the C11 technical corrigenda into the standard document, C18 does not really include any significant changes to the language so is probably not too critical for a portability tool like Autoconf.) Cheers, Nick
