PATCH: Merge objc-improvements-branch to mainline

[David Edelsohn]

	Missing a dependency?

In file included from /farm/dje/src/gcc-src/gcc/c-common.h:27,
                 from /farm/dje/src/gcc-src/gcc/stub-objc.c:28:
/farm/dje/src/gcc-src/gcc/ggc.h:39:24: gtype-desc.h: A file or directory in the path name does not exist.
make[2]: *** [stub-objc.o] Error 1
make[2]: *** Waiting for unfinished jobs....
echo timestamp > s-gtype
make[2]: *** Waiting for unfinished jobs....
make[2]: Leaving directory `/tmp2/powerpc-ibm-aix5.1.0.0-20030924/gcc'
make[1]: *** [stage2_build] Error 2
make[1]: Leaving directory `/tmp2/powerpc-ibm-aix5.1.0.0-20030924/gcc'
make: *** [bootstrap] Error 2