[Gm2] Snow Leopard, as per section 2.8 build instructions

[Dragiša Durić]

port build... gave terse information, so I repeated this part "by hand".

$ cd 
/opt/local/var/macports/build/_Users_dragisha_MacPorts_ports_lang_gm2-latest/work/build
$ sudo make -j2 all
....
        /usr/bin/gcc-4.2 -c   -pipe -O2 -DIN_GCC   -W -Wall -Wwrite-strings 
-Wstrict-prototypes -Wmissing-prototypes -pedantic -Wno-long-long 
-Wno-variadic-macros -Wold-style-definition -Wmissing-format-attribute    
-DHAVE_CONFIG_H -I. -I. -I../../gcc-4.1.2/gcc -I../../gcc-4.1.2/gcc/. 
-I../../gcc-4.1.2/gcc/../include -I../../gcc-4.1.2/gcc/../libcpp/include 
-I/opt/local/include -I/opt/local/include    
-DSTANDARD_STARTFILE_PREFIX=\"../../../\" 
-DSTANDARD_EXEC_PREFIX=\"/opt/local/lib/gm2-latest/gcc/\" 
-DSTANDARD_LIBEXEC_PREFIX=\"/opt/local/libexec/gcc/\" 
-DDEFAULT_TARGET_VERSION=\"4.1.2\" 
-DDEFAULT_TARGET_MACHINE=\"i386-apple-darwin10.5.0\" 
-DSTANDARD_BINDIR_PREFIX=\"/opt/local/bin/\" 
-DTOOLDIR_BASE_PREFIX=\"../../../../\"  `test "X${SHLIB_LINK}" = "X" || test 
"yes" != "yes" || echo "-DENABLE_SHARED_LIBGCC"` `test "X${SHLIB_MULTILIB}" = 
"X" || echo "-DNO_SHARED_LIBGCC_MULTILIB"` \
                
-DLIBSUBDIR=\"/opt/local/lib/gm2-latest/gcc/i386-apple-darwin10.5.0/4.1.2\" \
                -I. -I. -I../../gcc-4.1.2/gcc -I../../gcc-4.1.2/gcc/. 
-I../../gcc-4.1.2/gcc/../include -I../../gcc-4.1.2/gcc/../libcpp/include 
-I/opt/local/include -I/opt/local/include ../../gcc-4.1.2/gcc/gm2/gm2spec.c -o 
gm2spec.o)
In file included from ../../gcc-4.1.2/gcc/gm2/gm2spec.c:26:
./tm.h:11:29: error: insn-constants.h: No such file or directory
./tm.h:12:25: error: insn-flags.h: No such file or directory
In file included from ../../gcc-4.1.2/gcc/gm2/gm2spec.c:75:
./gm2/gm2config.h:25:1: warning: "PACKAGE_BUGREPORT" redefined
....
make[2]: *** [gm2spec.o] Error 1
make[2]: *** Waiting for unfinished jobs....
make[1]: *** [all-gcc] Error 2
make: *** [all] Error 2
$