Re: Defining the invocation of a shell command in a gpr project file

[Simon Wright <simon@pushface.org>]

Simon Wright <simon@pushface.org> writes:

> David Pereira <dmrpereira@gmail.com> writes:

>> So, my question is this: is it possible to invoke a shell command when
>> using gnatmake or gprbuild? I am implementing a binding to C library
>> and, since I am in Mac Os, I have to call the command
>> install_name_tool to change the path point to where the library I am
>> using is available, after the binary is compiled and linked.
>
> I think you can get away with using -rpath; see the last few paras of
> the dyld(1) man page, online at [1], as pointed out to me in a comment
> on [2].
>
> You could try
>
>    package Linker is
>       for Linker_Options use
>         ("-L/path/to/c/lib",
>          "-lclib",
>          "-rpath",
>          "/path/to/c/lib");
>    end Linker;

Turns out there's more to it than that. I've written up my
investigations at [1]; the key was that the C dylib needs to have an
@rpath in its name too.

Well, it works for me. Hope it helps you.

[1] http://forward-in-code.blogspot.co.uk/2014/02/c-libraries-and-runpath.html