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From: =?utf-8?Q?Yannick_Duch=C3=AAne_=28Hibou57?=
 =?utf-8?Q?=29?=
 <yannick_duchene@yahoo.fr>
Newsgroups: comp.lang.ada
Subject: Specifying an `--RTS` option in a GPR file, for a runtime library
Date: Sun, 14 Apr 2013 21:54:20 +0200
Organization: Ada @ Home
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Xref: news.eternal-september.org comp.lang.ada:15000
Date: 2013-04-14T21:54:20+02:00
List-Id: <comp.lang.ada>

Hi people once again,

I'm failing fixing an issue I have with a custom runtime.

First, the context:

   * I created a library project in a `runtime` directory;
   * It contains the directories `runtime/adalib` `runtime/adainclude` a=
nd  =

`runtime/build`;
   * the library project file holds these attributes:

     for Library_Name use "gnat-4.6";
     for Library_Kind use "static";
     for Source_Dirs use ("runtime/adainclude");
     for Library_Dir use "runtime/adalib";
     for Object_Dir use "runtime/build";
     for Library_Version use "1";

Now I have a test project. I wanted to add an `--RTS` option in the  =

Builder package, but the RTS seems to either be ignored (first case) or =
 =

cause the compilation of the test project to fail (second case).

If in the test project file I specify an absolute path like with

     Switches :=3D
       ("-s",
        "--RTS=3D/<dir>/runtime");

I get this message from `gprbuild`: =E2=80=9Cwarning: RTS for language a=
da is  =

discarded (full path)=E2=80=9D. Well, it compiles the test project, but =
`ldd`  =

shows it does not use the expected runtime.

If in the test project file I specify a relative path like with

     Switches :=3D
       ("-s",
        "--RTS=3Druntime");

I get this message from `gprbuild`: =E2=80=9Cwarning: no compiler specif=
ied for  =

language "Ada", ignoring all its sources=E2=80=9D then below =E2=80=9C"t=
est" is not a  =

source of project "test" gprbuild: problems with main sources=E2=80=9D, =
and the  =

compilation fails.

I can't understand what's wrong, according to
http://gcc.gnu.org/onlinedocs/gcc-4.1.2/gnat_ugn_unw/Switches-for-gnatma=
ke.html
it should works as follow:

(documentations says)
> --RTS=3Drts-path
> Specifies the default location of the runtime library.GNAT looks for t=
he  =

> runtime in the following directories,and stops as soon as a valid  =

> runtime is found (adaincludeor ada_source_path, and adalib or  =

> ada_object_path present):
>
>        <current directory>/$rts_path
>        <default-search-dir>/$rts_path
>        <default-search-dir>/rts-$rts_path

My test project resides in the directory containing the `runtime`  =

directory, so the relative path should be OK. Anyway, it does not work  =

neither with an absolute path, and the result is surprisingly different.=


In your opinion, is this just a search path issue or is it something wro=
ng  =

with the runtime library? (which is unmodified so far).


-- =

=E2=80=9CSyntactic sugar causes cancer of the semi-colons.=E2=80=9D [1]
=E2=80=9CStructured Programming supports the law of the excluded muddle.=
=E2=80=9D [1]
[1]: Epigrams on Programming =E2=80=94 Alan J. =E2=80=94 P. Yale Univers=
ity