Re: RFC: Changing AC_PROG_CC to AC_PROG_CC_C99 in top level configure

[Jeff Law via Gcc-patches]

On 4/30/2021 12:36 PM, Simon Marchi via Gcc-patches wrote:
On 2021-04-26 7:32 a.m., Nick Clifton via Gdb-patches wrote:> 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
Hi Nick,

I think this fix is obvious enough, I encourage you to push it, that
will fix the build failure many people get in opcodes/ppc-dis.c.  We'll
just remove the line later when we upgrade to Autoconf 2.71, as simple
as that.  For now we use 2.69.  If that matters, you have my OK for the
GDB side of things.

That works for me.  I'd just sent Alan the trivial patch to make 
ppc-dis.c compile again with C89, but if we're going to update 
configure.ac appropriately, then it wouldn't be needed.


Jeff