Re: [PATCH 0/3] Modernize header checks, v2

On 2013-09-07 10:06 AM, Paul Eggert wrote:
> Zack Weinberg wrote:
>> One remaining wart is that autoupdate
>> replaces AC_HEADER_STDC with an overt invocation of
>> _AC_INCLUDES_DEFAULT_REQUIREMENTS.  I couldn't find an AU_DEFUN
>> construct that didn't expose this internal macro but would still DTRT
>> both before and after an autoupdate run.  Ideas?
>
> Perhaps we should make that macro public, under the name
> AC_INCLUDES_DEFAULT_REQUIREMENTS.  It does seem weird
> to inject _AC_* stuff into user code.

I had a better idea this morning.  The problem I was having is 
fundamentally the same problem as Ross was having with conditional 
AC_CHECK_HEADERS, so:

AU_DEFUN([AC_HEADER_STDC],
[# Autoupdate added the following line to ensure that your configure
# script's behavior did not change.  It is probably safe to remove.
AS_IF([:], [], [ac_dummy="AC_INCLUDES_DEFAULT"])
],
  [...])

The complete testsuite is still running, but the specific check of 
AC_HEADER_STDC passed with this construct.

> The other changes you're making all sound reasonable,
> though I haven't reviewed the code.  Unless someone
> objects soon I think they should be installed.  Would
> you like to do that?  I see two Zack Weinbergs zackw
> and zwol at Savannah, but neither have checkin rights,
> so I'm not sure what's going on there.

'zackw' is my current Savannah account.  If you give it checkin rights, 
I can land the patches.  I would appreciate a detailed review if you 
have time, though; this is the first time I've attempted to make serious 
changes to Autoconf itself.

'zwol' is also a handle I use often; it's likely that I created that 
account some time ago and then lost the password.

zw