[Mono-list] Providing Dynamic Makefile Defaults

[Jonathan Pryor]

There's just one problem with this suggestion: the module that
type-reflector is in (mcs) doesn't have an autoconf configure script.

I found a different solution.  Non-ideal, but it works.  Have a
"recursive" make (that actually invokes itself) that attempts to build
the specified target.  Chain several calls together in this fashion. 
For example:

	all:
		make gui-all || make gtk || make swf || make console

In this case, "make console" should *always* build, so a valid
executable should always be generated.

The downside with this is extra overhead.  On my Windows box (which
doesn't have Gtk# installed) it has to attempt building 3 times, as
gui-all and gtk both fail before swf correctly builds.

As I said, non-ideal.  But it works.

In the future I'll probably move the different front-ends into different
assemblies (dlls), so I can do the same trick for each front-end
assembly but not worry about attempting to recompile ~56 source files. 
I'm not sure when I would implement this.

 - Jon

On Thu, 2003-01-09 at 18:42, Peter Williams wrote:
> On Thu, 2003-01-09 at 18:10, Jonathan Pryor wrote:
> > ...
> > 
> > Is there a reasonable way to use "console" as the fallback target, and
> > use "gtk" or "swf" if the appropriate libraries are installed?
> 
> The standard way to do this would be
> 
> 1. create makefile.gnu.in that has something along the lines of:
> 
> 	TYPE_REFLECTOR_TARGET = @TYPE_REFLECTOR_TARGET@
> 
> 	all: makefile.gnu $(TYPE_REFLECTOR_TARGET)
> 
> 	swf:
> 		blah
> 
> 	console:
> 		blah
> 
> 	gtk:
> 		blah
> 
> 	makefile.gnu: ../../config.status makefile.gnu.in
> 		cd ../.. && CONFIG_FILES=foo/bar/makefile.gnu CONFIG_HEADERS =
> ./config.status
> 
> 2. Add a necessary configure check that does
> 
> 	blah blah checks...
> 	TYPE_REFLECTOR_TARGET=[one of console, swf, gtk]
> 	AC_SUBST(TYPE_REFLECTOR_TARGET)
> 	
> 	AC_OUTPUT([stuff that's already there, foo/bar/makefile.gnu])
> 
> 3. Remove makefile.gnu from cvs
> 
> So that the configure process will generate a makefile that has the
> correct target embedded in itself, and it will recreate the makefile if
> config.status changes or the makefile template changes.
> 
> Peter