Re: Like config.h.in but in Ada

[Mathieu Lirzin]

Victor Porton <address@hidden> writes:

> I want to create file config.ads similar to config.h but with Ada
> syntax instead of C.
>
> I created config.ads.in, added it to configure.ac and got:
>
> package Boiler.Config is
>    Data_Dir: constant String := "${prefix}/share";
> end Boiler.Config;
>
> from
>
> package Boiler.Config is
>    Data_Dir: constant String := "@datadir@";
> end Boiler.Config;
>
> It is not acceptable because Ada does not understand ${prefix}.
>
> How to make a value into an Ada string (a string delimited by double
> quotes)?
>
> It could be not ideal but acceptable if the code didn't work with paths
> containing double quotes.

I have no experience with Ada however the general fix is to generate
"config.ads" at "make" time so that $prefix variable will be expanded.
in C you can achieve that with CPPFLAGS:

   AM_CPPFLAGS = -DPACKAGE_LOAD_PATH=\"$(moduledir)\"

With other language this has to be done differently, you can use 'sed'
or 'config.status' in your Makefile.  More details are provided in the
Autoconf manual [1].

[1] 
https://www.gnu.org/software/autoconf/manual/autoconf.html#Installation-Directory-Variables

-- 
Mathieu Lirzin
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