AC_PROG_CC now tries C23 too
commit653956f44683e1daed9827de429590bdd2e317e7
authorPaul Eggert <eggert@cs.ucla.edu>
Tue, 30 Apr 2024 17:26:50 +0000 (30 10:26 -0700)
committerPaul Eggert <eggert@cs.ucla.edu>
Tue, 30 Apr 2024 17:33:37 +0000 (30 10:33 -0700)
treead5887ecc222b5735f9a61b1a8aee06c6131be06
parente9fee73dba5d2156abc48734b5a9faff89dcdc11
AC_PROG_CC now tries C23 too

As C23 is now mostly supported by GCC, it's time for
AC_PROG_CC to prefer C23 if available.
* lib/autoconf/c.m4 (_AC_C_C23_TEST_GLOBALS, _AC_C_C23_TEST_MAIN):
(_AC_C_C23_TEST_PROGRAM, _AC_C_C23_OPTIONS): New macros.
(_AC_PROG_CC_STDC_EDITION): Try C23 first.
NEWS
doc/autoconf.texi
lib/autoconf/c.m4