AC_PROG_CC_C89, AC_PROG_CC_C99, AC_PROG_CC_STDC: Use AU_ALIAS.

Based on a suggestion by Adrian Bunk in
http://lists.gnu.org/archive/html/autoconf-patches/2012-09/msg00040.html
* lib/autoconf/c.m4 (AC_PROG_CC_C89, AC_PROG_CC_C99, AC_PROG_CC_STDC):
Use AU_ALIAS, now that AC_PROG_CC is defined via AC_DEFUN_ONCE.

diff --git a/lib/autoconf/c.m4 b/lib/autoconf/c.m4
index cf382dad4415ea9207bd18487ec17a53f565bfbb..4a84489c793bbc6fd72077899144be97fa2610bc 100644 (file)
--- a/lib/autoconf/c.m4
+++ b/lib/autoconf/c.m4
@@ -1448,24 +1448,15 @@ dnl preferably extc11.
 
 # AC_PROG_CC_C89
 # --------------
-AC_DEFUN([AC_PROG_CC_C89],
-[ AC_REQUIRE([AC_PROG_CC])dnl
-  m4_warn([obsolete], [$0 is obsolete; use AC_PROG_CC])
-])
+AU_ALIAS([AC_PROG_CC_C89], [AC_PROG_CC])
 
 # AC_PROG_CC_C99
 # --------------
-AC_DEFUN([AC_PROG_CC_C99],
-[ AC_REQUIRE([AC_PROG_CC])dnl
-  m4_warn([obsolete], [$0 is obsolete; use AC_PROG_CC])
-])
+AU_ALIAS([AC_PROG_CC_C99], [AC_PROG_CC])
 
 # AC_PROG_CC_STDC
 # ---------------
-AC_DEFUN([AC_PROG_CC_STDC],
-[ AC_REQUIRE([AC_PROG_CC])dnl
-  m4_warn([obsolete], [$0 is obsolete; use AC_PROG_CC])
-])
+AU_ALIAS([AC_PROG_CC_STDC], [AC_PROG_CC])
 
 
 # AC_C_BACKSLASH_A