That does seem like something that could be a good macro. The autoconf dev team have been sitting runstatedir patches included by Debian for like 6 years though, so I wouldn't hold my breath for any releases or any new functionality in the near future. On Jan 24, 2020 9:32 AM, "Christian Biesinger" <cbiesinger@xxxxxxxxxx> wrote: > Hi there! > > 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? > > Thanks! > Christian > >