Problem with implicit rule in make

[Roberto E. Vargas Caballero]

Hi,

I have the following simple Makefile:

        CPPFLAGS = -I../inc

        all: libcc.a

        libcc.a: libcc.a(die.o) libcc.a(xcalloc.o) libcc.a(xmalloc.o)

        clean:
                rm -f *.o *.a

which should generate a static library using a default rule. This Makefile
works in another systems, and it is accepted by POSIX standards [1]. The
rule in /usr/share/mk/sys.mk is:

        .c.a:
                ${COMPILE.c} ${.IMPSRC}
                ${AR} ${ARFLAGS} $@ $*.o
                rm -f $*.o

but when I run make I get this output:

        $ make
        cc -O2 -pipe  -I../inc -c die.c
        cc -O2 -pipe  -I../inc -c xcalloc.c
        cc -O2 -pipe  -I../inc -c xmalloc.c

Anyone could point me what is the problem?

Regards,

[1] http://pubs.opengroup.org/onlinepubs/009695399/utilities/make.html

-- 
Roberto E. Vargas Caballero