gmp fails to compile due to nm issues on 10.5

[rmottola (Riccardo)]

while compiling on 10.5 I get the error below.

checking for assembler local label prefix... configure: WARNING: "/usr/bin/nm -p" failure
configure: WARNING: cannot determine local label, using default L
L
checking for assembler byte directive... .byte
checking how to define a 32-bit word... /usr/bin/nm: object: conftest.o malformed object (unknown load command 1)
/usr/bin/nm: object: conftest.o malformed object (unknown load command 1)

I added this part to the portfile:

if {${os.platform} eq "darwin" && ${os.major} < 10} {
    depends_build-append port:cctools
    configure.env-append NM=${prefix}/bin/nm
    configure.args-append lt_cv_path_NM=${prefix}/bin/nm
} 

And configure passes and gmp compiles !