zconf: fixed yacc/lex prefix

[zack-vii]

No description provided.

[AndreaRigoni]

Hi Timo, sorry for the delay...
Great !! thanks for your fixes.

I would ask you to make a small change on this if you can.
if you are not using the variable in the makefile do not use AM_CONDITIONAL and use AS_IF instead.
AM_CONDITIONAL defines two more variables in Makefile that I would not add if they are not required.

If you prefer I could merge this now and then change it back to use AS_IF ..

Thanks again !!

Andrea

[zack-vii]

Ah yea well my automake skills are minimal so i copied from here and there to get the effect i wanted.. fell free to clean it up.. but i would not know what to replace without risking a lost of functionality .. i assume AM_IF combined AM_COND_IF and AM_CONDITION without the generation nthe intermediate objects, ie. the CONDITION ?

[AndreaRigoni]

As far as I know .. ( noone is really skilled in Automake stuff :-) the AM_CONDITIONAL add two magic variables to Makefile.in from Makefile.am.

Example:
AM_CONDITIONAL([TIMO],[ test x${USER} = xTimo ])
(if the user is Timo ) adds:
ENABLE_TIMO_TRUE =
ENABLE_TIMO_FALSE = #
( if the user is not Timo ) adds:
ENABLE_TIMO_TRUE = #
ENABLE_TIMO_FALSE =

This is not the actual variable TIMO though ... you can define it with
AS_VAR_SET([TIMO], [Timo S.])
and then use
AC_SUBST([TIMO])
to have it in the Makefile

and the if condition in Makefile.am ( that is not present in regular Makefiles ) is replaced like this:

hello:
if TIMO
echo "Hello $(TIMO) !"
else
echo "Hello stranger !"
endif

is replaced with

hello:
@ENABLE_TIMO_TRUE@ echo "Hello $(TIMO) !"
@ENABLE_TIMO_FALSE@ echo "Hello stranger !"

Nice Automake trick to ease writing Makefile but make it hard to learn :-)

The AM_COND_IF is there to make you able to use the defined condition also during configuration..

on the other hand the AS_IF is simply replaced with a if clause in the configure script

AS_IF([test x${USER} = "Timo"],
[echo "you are configuring stuff as Timo"],
[echo "Who are you ... what are you doing with my code !"])