[Omake] gnu make to omake port, 2nd and final glitch

[Nick]

Hello again,

If omake developers can address the concerns in this email, then all my
problems will have
been solved.
As I mentioned previously I am porting a gnu make project to omake.
For the powers that be to approve this port there is one requirement to
fulfill -
ALL derived objects ought to be built relative to some env. variable
$(ROOTDIR) that
is passed in and we cannot control.
For instance if the sources were exported to us as READ ONLY via nfs,
then we can't
possibly write to /nfs/source_tree. But we can write to $(ROOTDIR) and
descendants.

The following toy OMakefile attempts to blindly mimick the gnu makefile
without trying to
make use of superior capabilities found in omake.
I get error 
"filename pattern is a path:
../../derived/yprog_eod/x86_64-unknown-linux-gnu/%.o"

I am not at all opposed to abandon the gnu make model and move to a
better one. as long
as it meets the requirement stated above.
How would you create all derived objects with omake relative to some
arbitrary $(ROOTDIR)?

----------------------------------------------------------------------------
#
.PHONY: yprog ctrprog

ROOTDIR = ../../derived

static. =
   PLATFORM = $(nth 0, $(shell ../build/config.guess))
   mkdir -p $(ROOTDIR)/$(PLATFORM)

CC = cc

nonempty(l) = 
   value $(gt $(length $l), 0)

join(l1, l2) =
  result[] =
  while $(and $(nonempty $(l1)), $(nonempty $(l2)))
     x = $(nth 0, $(l1))
     y = $(nth 0, $(l2))
     l1 = $(nth-tl 1, $(l1))
     l2 = $(nth-tl 1, $(l2))
     result[] += $x$y
  value $(result)

Cmyprog(name, cfiles) =
   F0 = $(replacesuffixes .c,.o,$(cfiles))
   F1 = $(addsuffix /$(PLATFORM)/, $(dirof $(F0)))
   F2 = $(addprefix $(ROOTDIR)/, $(F1))
   F3 = $(basename $(F0))
   F4 = $(join $(F2), $(F3))
   $(ROOTDIR)/$(PLATFORM)/$(name): $(F4)
       $(CC) ($CFLAGS) -o $@ $(F4) $(CLIBS)

#   $(println $(string $(F2)))
   i = 0
   len = $(length $(F2))
   while $(lt $i, $(len))
     left = $(nth $i, $(F2))
     right = $(nth $i, $(F3))
     $(left)%.o: $(right)/%.c
         $(CC) -o $@ -c $(CFLAGS) @<

   i = $(add $i, 1)

.DEFAULT: $(ROOTDIR)/$(PLATFORM)/yprog_eod

YSRCS = yprog_eod/main.c ctrprog/db/db.c

Cmyprog(yprog_eod, $(YSRCS))
-- 
  Nick
  z508617 at ftml.net

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