RFC: Changing AC_PROG_CC to AC_PROG_CC_C99 in top level configure

[Nick Clifton via Gcc-patches]

Hi Guys,

  Given that gcc, gdb and now binutils are all now requiring C99 as a
  minimum version of C, are there any objections to updating
  configure.ac to reflect this ?

Cheers
  Nick

diff --git a/configure.ac b/configure.ac
index a721316d07b..59b4194fb24 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1278,7 +1278,7 @@ else
   WINDMC_FOR_BUILD="\$(WINDMC)"
 fi

-AC_PROG_CC
+AC_PROG_CC_C99
 AC_PROG_CXX

 # We must set the default linker to the linker used by gcc for the correct