r.tiff still not compiled

[ALOBO]

Hi!
I'm trying to compile r.in.tiff and r.out.tiff.
When i run gmake4.1 form src.contrib/SCS/raster/r.tiff I get:
/tele/grass/src.contrib/SCS/raster/r.tiff/cmd
  make -f OBJ.RS6000/make.rules

        cc -s -o /tele/grass/RS6000/etc/bin/contrib/cmd/r.out.tiff OBJ.RS6000/r.
out.tiff.o /tele/grass/src/libes/LIB.RS6000/libgis.a ../libtiff/LIB.RS6000/libti
ff.a
cc: 1501-228 input file ../libtiff/LIB.RS6000/libtiff.a not found

When I run gmake4.1 from src.contrib/SCS/raster/r.tiff/tools I get:
/tele/grass/src.contrib/SCS/raster/r.tiff/tools
  make -f OBJ.RS6000/make.rules

Make: make: 1254-002 Cannot find a rule to create target ../libtiff/LIB.RS6000/l
ibtiff.a from dependencies.

When i run gmake4.1 form src.contrib/SCS/raster/r.tiff/libtiff I get:
/tele/grass/src.contrib/SCS/raster/r.tiff/libtiff
  make -f OBJ.RS6000/make.rules

        rm -f OBJ.RS6000/tif_compat.o
        cc -g -I. -DUSE_VARARGS=1 -DUSE_PROTOTYPES=0 -c tif_compat.c
"./machdep.h", line 193.16: 1506-159 (E) Bit-field type specified for mant is no
t valid. Type unsigned assumed.
"./machdep.h", line 216.16: 1506-159 (E) Bit-field type specified for mant is no
t valid. Type unsigned assumed.
"./machdep.h", line 225.2: 1506-046 (S) Syntax error.
"./machdep.h", line 232.2: 1506-046 (S) Syntax error.

I suspect the problem is on /libtiff. I'm using an IBM RS6000 under AIX.
I don't see any makefiel for AIX ... Could this be the problem?

Thanks
Agus