Library file locations (was: Debian Policy for Ada, Second Edition)

["Björn Persson" <spam-away@nowhere.nil>]

Tapio Kelloniemi wrote:
> Pascal Obry <pascal@obry.net> wrote:
> 
>>Ludovic Brenta a écrit :
>>
>>
>>>I am not aware of a GNAT default.  What is the default? And why does
>>>it not follow the GNAE?
>>
>>The scheme is something like:
>>
>>/opt/GNAT/<ver>
>> /bin                 <- binaries there
>> /lib/gnat/           <- project files there (GNAT looks there)
>> /lib/gnat/<project>  <- if needed sub-project files
>> /lib/<project>       <- .o .ali .a .so for <project>
>> /lib                 <- sym links to .a and .so above
>> /include/<project>   <- .ads/.adb for <project>
> 
> 
> GNAT people seemingly haven't read FHS. This is what it says about the
> include directory:
> "This  is  where all of the system's general-use include files for the C
> programming language should be placed."

It doesn't forbid putting non-C files there. FHS doesn't mention Ada, so 
the most logical thing to do is to treat .ads files like .h files.

> Non-C languages generally use lib, like Python and Ruby.

Python doesn't have a system with separate specifications and 
pre-compiled libraries. A Python module is contained in a single file, 
so the Python developers had to choose between include and lib. 
Apparently they chose lib. I would guess that the situation with Ruby is 
similar.

> I would like to raise the question publicly: where Ada-folks would like to put 
> their .adb and .ads files?

The scheme that Pascal posted looks good, although I'm not sure lib/gnat 
is the best choice for project files. It should of course be under /opt 
only when installed as a third-party package. When it's included in an 
OS distribution, /opt/GNAT/<ver> should be replaced with /usr.

-- 
Bj�rn Persson                              PGP key A88682FD
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