Re: GNAT shared libraries under Linux

[Juergen.Pfeifer@t-online.de (Juergen Pfeifer)]

Markus Kuhn wrote:
> 
> Is it possible to compile libada.a into a shared library with
> gnat-3.10p under Linux?
> 
> At the moment, the way I use gnat, every executable I produce
> is statically linked with the Ada run-time system, which causes
> even 20 lines long programs to produce easily over 100 kb long
> executables (even with -O2 -gnatp and "strip"ed).
> 
I built it from the sources on my redhat 5.0 system (requires a tiny
patch). The important thing is to use "make gnatlib-shared" if you
build the library. Next step is to make sure, that the linker knows
about the shared library. I simply put a symlink /usr/lib/libgnat.so
to the shared library located in the gcc library subdirectory. After
the usual ldconfig it works fine with the shared runtime.

I'm actually experimenting now with glibc-2.1 und kernel 2.1.103.
This again requires some small patches that I'm currently testing,
because the glibc developers have changed the LinuxThreads a little
bit. I've it up und running now, but there are problems with tasking.
      - Every of the test programs of florist get's a CONSTRAINT_ERROR
        and I've problems to debug this because gdb gets always
        interrupted by the realtime signals the glibc now uses for
        threading.
      - Programs using tasking are not properly terminated when killed
        by a SIGINT. There are always remaining threads that have to be
        killed from the commandline.

Cheers
Juergen