libjava: Support --enable-version-specific-runtime-libs.

[Andreas Jaeger]

On Wed, Jun 09, 2004 at 11:06:37AM -0600, Tom Tromey wrote:
> >>>>> "Andreas" == Andreas Jaeger <aj@suse.de> writes:
> 
> Andreas> The appended patch adds support for
> Andreas> --enable-version-specific-runtime-libs to libjava.
> 
> Do you have a pointer to the discussion of this feature?  I read the
> explanation in install.texi, and I don't really see why the user can't

I have no pointer but the oldest ChangeLog I could find is from libstdc++-v3:

2000-10-24   Mark Harig <mharig@landmark.com>

        * docs/configopts.html: Added documentation for the
        "--enable-version-specific-runtime-libs" and
        "--with-gxx-include-dir" configuration switches.

2000-10-13  Benjamin Kosnik  <bkoz@purist.soma.redhat.com>
            Mark Harig  <markh@landmark.com>

        * src/Makefile.am (toolexeclibdir): Add support fo
        VERSION_SPECIFIC_LIBS and --with-gxx-include-dir.
        * src/Makefile.in: Regenerate.
        * libsupc++/Makefile.am: Same.
        (glibcppinstalldir): Adjust.
        * libsupc++/Makefile.in: Regenerate.
        * Makefile.am: Remove gxx_include_dir. Remove INCLUDE.
        * Makefile.in: Regenerate.
        * docs/configopts.html: Add descriptions of flags.

> just make a new --prefix for this case.  But I'd like to read the
> original discussion instead of going over the arguments again...

You might want to install gcc into /usr/bin as gcc-3.5 besides
your current compiler - and have the includes and libraries completly
separate.  With --libdir you would need to change this with every
version.


> 
> Andreas> +AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
> 
> Do we really need this?  This isn't really an ordinary configure
> check.

I'll check the next days, I copied from other configure files.
> 
> Andreas> +# Process the option "--enable-version-specific-runtime-libs"
> Andreas> +gcc_version_trigger=${srcdir}/../gcc/version.c
> 
> Is this correct for multilibs when srcdir==objdir?

I assume - it's the same as done for libstdc++.  But I'll double check...

> I think you need $libgcj_basedir/../gcc/version.c here.
> See the comments in LIBGCJ_CONFIGURE in acinclude.m4.

and might use that instead.

> Otherwise this looks fine.
> BTW does it need a tweak for header file installation?

That's something that could be done additionally.  For C++ we do it
this way, but not everywhere.  I wanted to have the basic support in
before tackling this.

Andreas
-- 
 Andreas Jaeger, aj@suse.de, http://www.suse.de/~aj
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