gen-make and library dependencies

Hello

Erik Hülsmann has a problem with libraries, see
http://www.contactor.se/~dast/svn/archive-2003-08/0484.shtml

It boils down to ra_dav's use of neon and svnversion's use of
gen-make. In build.conf svnversion has

libs = libsvn_client $(SVN_APRUTIL_LIBS) $(SVN_APR_LIBS)

which generates a link command that links against all the Subversion
libraries and their dependencies. The problem is that libsvn_client
pulls in libsvn_ra_dav (through libsvn_ra) which pulls in neon. With
the libs line above the neon libraries appear in the middle of the
link, and in Erik's case that upsets the subsequent Subversion
libraries.

I think I can fix Erik's problem by adding NEON_LIBS as follows

libs = libsvn_client $(SVN_APRUTIL_LIBS) $(SVN_APR_LIBS) $(NEON_LIBS)

as this causes a link command with the neon libs at the end. I don't
know if this is a gen-make feature or a libtool feature.

However the libs line for the svn program is

libs = libsvn_client libsvn_wc libsvn_ra libsvn_delta libsvn_subr
        $(SVN_APRUTIL_LIBS) $(SVN_APR_LIBS) $(NEON_LIBS)

which includes additional Subversion libraries. Are these additional
Subversion libraries necessary? svnversion appears to get them simply
by specifiying libsvn_client. Why those and not the other Subversion
libraries?

The same question applies to other executables/libraries. Do they
need to declare all their dependents, or only the immediate
dependents. For example libsvn_client depends on libsvn_wc and
libsvn_wc depends on libsvn_subr, so does libsvn_client need to
explictitly declare that it depends on libsvn_subr or can it simply
get it through libsvn_wc. Everything appears to work if I remove
libsvn_subr from libsvn_client's libs list.

-- 
Philip Martin
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