Re: [RFC] improving support for building native tools in cross setups

On Thu, Jan 30, 2014 at 10:16:06PM +0100, Yann Dirson wrote:
> On Thu, Jan 30, 2014 at 09:53:59PM +0100, Yann Dirson wrote:
> > > > And without even trying to touch this, I also have
> > > > another problem to deal with, where requesting my native binary
> > > > triggers some sort of default rule attempting to build the binary in
> > > > one step directly from the C source, with the cross-cc and wrong flags.
> > > >
> > > 
> > > If it is running the wrong rule make sure there is an explicit rule
> > > for the target in the makefile.
> > 
> > Yep, going on a hunt :)
> 
> Well, in fact it *is* the implicit rule triggering, and the problem is
> I'm cross-building for win32 and haven't separated a BUILD_EXEEXT for
> now, so it expects my native tools to end with .exe.  Not too hard to
> work on :)
> 

I have pushed my current work on github[1].  Still very much a
prototype for comments.

https://github.com/ydirson/automake/commits/native

Tested with the following changes to gnushogi master:

-noinst_PROGRAMS = pat2inc sizetest
+native_PROGRAMS = pat2inc
+noinst_PROGRAMS = sizetest
+BUILD_CCLD = $(BUILD_CC)
+pat2inc_CC = $(BUILD_CC)


I'm quite happy that there is nothing to override per-target for the
link rule, and still feel the "= $(BUILD_CC)" should not be necessary.

What do you think of the general idea ?  What suggestions would you
have for a better implementation ?

Best regards,
-- 
Yann