RE: transport conditionals to other files (was: (no subject))

[ting xie]

Thank you very much. The information is very helpful. I have solved the problem 
by using AC_SUBST. 

Ting


> Date: Fri, 17 Sep 2010 22:07:00 +0200
> From: address@hidden
> To: address@hidden
> CC: address@hidden
> Subject: transport conditionals to other files (was: (no subject))
> 
> Hello Ting,
> 
> * ting xie wrote on Thu, Sep 16, 2010 at 10:23:45PM CEST:
> > How are you? It is quite a long time since we talked last time. 
> 
> Yes.  I'm just fine, thanks!  (There are many other helpful readers
> on this list, by the way ...)
> 
> > I got a new question about autoconf now. Suppose I have defined a
> > conditional variable in configure.ac file as follows. 
> > 
> > AM_CONDITIONAL([FOO], [test x$foo = xtrue])  
> > 
> > I have another file test.inc.in file, if I want to put the condition
> > foo into this .inc.in file, how can I do that? 
> 
> Hmm, you cannot put the condition into another file right away, as for
> one, the shell variable $foo will not have any meaning there.  However,
> if the file is instantiated by config.status (i.e., config.status reads
> FILE.inc.in and produces FILE.inc from it), then you can use a
> substituted variable; put AC_SUBST([foo]) in configure.ac, and @foo@ in
> FILE.inc.in, and it will get replaced with the value of $foo.
> 
> > BTW, I do not understand this kind of postfix .inc.in file. May you
> > also give me some explanation on this kind of files if you have time? 
> 
> The .in postfix usually indicates that this file is read by
> config.status to create a file without the .in postfix; see
>   info Autoconf "Configuration Files"
> 
> for more information.
> 
> Hope that helps.
> 
> Cheers,
> Ralf