.SUFFIXES hosed by switch to automake 1.9.x

[Ralf Corsepius]

On Wed, 2007-04-18 at 16:34 +0100, Joern Rennecke wrote:
> On Wed, Apr 18, 2007 at 04:53:20PM +0200, Ralf Corsepius wrote:
> > In rtems Makefile.am's I am using this construct:
> > 
> > project_libdir = $(libdir)
> > 
> > EXTRA_DIST = crt0.S
> > crt0.$(OBJEXT): crt0.S
> >         $(CPPASCOMPILE) -o $@ -c $<
> > project_lib_DATA = crt0.$(OBJEXT)
> 
> I am now using this (copied from another directories's Makefile.in):
> 
> CCASCOMPILE = $(CCAS) $(AM_CCASFLAGS) $(CCASFLAGS)
> .S.o:
>         $(CCASCOMPILE) -c $<
> 
> The presense of the .S.o rule also has the effect of fixing the generated
> .SUFFIXES rules to allow .S .
You will want CPPASCOMPILE. 

CCASCOMPILE is *.s -> *.o

I don't know off-head if CPPASCOMPILE was introduced in automake-1.10 or
already is present in automake-1.9 (already outdated for quite some
time).

Ralf