libraries and the build system
Stefan (metze) Metzmacher
metze at samba.org
Thu Nov 18 09:18:44 GMT 2004
> > Are there any architectural issues that would prohibit Samba from using
> > Libtool? If so, would it be possible to work with Libtool developers to
> > resolve those issues?
> Every time I download a package and find it uses libtool I get a "oh
> no, not again" feeling. I've just had far too many bad experiences
> with libtool, especially when something mysterious goes wrong and
> debugging it is invariably a nightmare.
> If we wanted something like libtool then I would write a new one that
> works like this:
> - during configure it would work out what strategy is needed for the
> various compile/linking tasks on this platform.
> - this strategy would be returned in the form of a string, a bit like
> the config.guess output, but oriented to compiler/linker type.
> - the strategy strings would be chosen from a set of known
> strategies. Internally each strategy would have a test component
> that tests if that strategy string works.
> - at configure time each strategy is tested until one is found that
> works. There would be an internal ordering of the strategy strings
> so the most functionally advanced strategies would be tried first.
> - the tool would then take this string as input for further
> operations, but not actually _do_ any of the compile/link
> operations itself, it would instead return the commands needed, in
> the form of make rules.
> - these resulting make rules would be placed in the Makefile
> - normal "make" will then do the actual compile/link/install, but
> without need for any further calls to the tool
> So the tool would essentially be a "discovery" tool, that knows how to
> work out appropriate build rules for a platform. It would not be a
> tool that attempts to actually do the work. This makes it debuggable,
> as you get a normal Makefile, that programmers know how to edit.
That was the idea I have with samba4's build system, it should do all the
hard work and generate a well structured Makefile
BTW: I also hate libtool :-)
Stefan Metzmacher <metze at samba dot org>
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