If necessary, pull in <bsd.sys.mk> to get the definition of HOST_SH; Makefiles that pull in one of (most of) <bsd.*.mk> will get this anyway.
replaces gdb50 from toolchain on archs which use gcc3
to "yes". - adjust dbsym/mdsetimage to look in the correct place for libbfd. - new mknative-gcc based in toolchain/mknative