Re: [Vala] Vala support for automake

[Jürg Billeter <j bitron ch>]

Hi Ralf,

On Thu, 2009-04-16 at 20:49 +0200, Ralf Wildenhues wrote:
> * Jürg Billeter wrote on Wed, Apr 15, 2009 at 08:56:44PM CEST:
> > On Wed, 2009-04-15 at 20:42 +0200, Ralf Wildenhues wrote:
> > > or even
> > >   valac -C b.vala
> > >   valac -C e.vala
> >
> > This would not work, valac requires all Vala source files of the same
> > program / library on the same commandline. The reason is that the source
> > files can depend on each other, but there is no header/include
> > mechanism.
>
> Hmm.  What if I do something like this:
>
> bin_PROGRAMS = foo
> foo_SOURCES = foo1.vala foo2.vala
> foo_LDADD = libbar.a
> noinst_LIBRARIES = libbar.a
> libbar_a_SOURCES = bar1.vala bar2.vala
>
> How would valac cope with the necessarily separate invocations for
> foo*.vala and bar*.vala?  And what happens if you try to put vala
> code into shared libraries, and use them from other vala code?

In this case you instruct valac to generate a bar.vapi and a bar.h file
and use those files in the program by specifying

libbar_a_VALAFLAGS = --library bar -H bar.h
foo_VALAFLAGS = bar.vapi

A .vapi file contains declarations for Vala libraries, similar to a .h
file for C libraries.

Thanks,
Jürg