libXaw3d: optional features

[Thomas Dickey]

On Mon, 29 Aug 2011, RafaÅ~B MużyÅ~Bo wrote:

> On Sun, Aug 28, 2011 at 10:15:05AM -0400, Gaetan Nadon wrote:
>>
>>         "AM_YFLAGS is usually used to pass the -d option to yacc.
>>         Automake knows what this means and will automatically adjust its rules
>>         to update and distribute the header file built by ‘yacc -d’."
>>
>>
>> ./configure --help:
>>
>>           YFLAGS      The list of arguments that will be passed by default to $YACC.
>>                       This script will default YFLAGS to the empty string to avoid a
>>                       default value of `-d' given by some make applications.
>>
>>
>> It would appear there is a long story behind this. Not to mention
>> platforms we don't use,
>> different versions of yacc and bison, make programs, backward
>> compatibility, etc..., etc...
>>
>> There are a couple of apps and the xserver using it as well and I find
>> it reassuring when the same situations are coded the same way and have
>> been reviewed.
>>
> I can't say that I've used yacc, but 'bison -y -Wall' doesn't print any
> compatibility warnings about '%defines', so it should have been OK.

It's bison-specific, as you might have discovered by checking the 
documention.  A quick check of the source shows it was added in bison
1.29

awai

-- 
Thomas E. Dickey
http://invisible-island.net
ftp://invisible-island.net