[Asterisk-Dev] compile app_dial.c

[Tzafrir Cohen]

On Tue, Dec 06, 2005 at 07:45:35AM -0600, Tilghman Lesher wrote:
> On Tuesday 06 December 2005 02:16, Tzafrir Cohen wrote:
> > On Mon, Dec 05, 2005 at 06:27:10PM -0500, Russell Bryant wrote:
> > > On Dec 5, 2005, at 5:27 PM, Steven Critchfield wrote:
> > > >>I have complied asterisk from source.
> > > >>I am trying to recompile app_dial.c after made couple of little
> > > >>changes.
> > > >>What I want to do is to recreate app_dial.so without recompile
> > > >>full asterisk.
> > > >>How can I do it?
> > > >
> > > >First, rebuilding asterisk isn't much of a chore.
> > > >
> > > >Second, learn how make works. Make shouldn't rebuild all of the
> > > > source unless you have done a make clean.
> > > >
> > > >So finally, you should just issue a make in the base of the
> > > > asterisk tree.
> > >
> > > There is also a utility that was written by Anthony Minessale
> > > (anthm) that can be used for this.  Copy contrib/scripts/astxs to
> > > somewhere in your PATH.  Then, in the base asterisk source
> > > directory, run 'astxs apps/app_dial.c'.
> >
> > If the change is simply in app_dial.c, shouldn't a simple 'make
> > app_dial.c' from apps do just that?
> >
> > If not: what's the problem?
> 
> No, there are additional flags defined in the main Makefile which need
> to be passed to the subdirectory.  They are not in the subdirectory to
> begin with, because they need to be consistently applied to each
> subdirectory, and different build targets require different flags.
> 
> The astxs script emulates the passing of these flags to a directory
> which is not even under the asterisk tree.

So basically we have the cons of a recursive make (no really simple way
of building a single target) but not the benefits of it (not possible to
run make from a subdir).

One common prctice is to split out most of the common code of the
makefile into code that is include-d by make, rather than the current
practice in the Asterisk build system of exporting vars.

-- 
Tzafrir Cohen     icq#16849755  +972-50-7952406
tzafrir.cohen at xorcom.com  http://www.xorcom.com