[I've omitted history going in a different direction than this note.]
On 2015-Apr-1, at 02:49 PM, Warner Losh <imp at bsdimp.com> wrote: > > On Apr 1, 2015, at 4:37 PM, Mark Millard <[email protected]> wrote: > >> From a powerpc (non-64) 11.0-CURRENT boot is the following supposed to work >> by producing a powerpc64 appropriate result (no CROSS_TOOLCHAIN for this >> question)? >> >> make buildworld buildkernel KERNCONF=GENERIC64 TARGET=powerpc >> TARGET_ARCH=powerpc64 > > This should work, modulo broken compilers. > >> The standard v4.2.1 /usr/bin/gcc in a powerpc context (non-64) for that make >> command would produce files for TARGET_ARCH=powerpc unless the command lines >> specified otherwise. > > Ah, so it is a ‘cross build’ situation... > >> Notably the build environment is picking powerpc64 specific paths when >> appropriate, such as: >> >> lib/csu/powerpc64/Makefile >> >> so that specific Makefile is not likely to be used when powerpc64 handling >> is inappropriate, even executed from from a powerpc (non-64) context. A >> different path (and so a distinct Makefile) would be used for >> KERNCONF=GENERIC TARGET_ARCH=powerpc . After some experimentation I think that I've learned that I'd not guessed the existence of a required step to enable "make buildkernel KERNCONF=GENERIC64 TARGET=powerpc TARGET_ARCH=powerpc64" from powerpc: one first must do a... make kernel-toolchain KERNCONF=GENERIC64 TARGET=powerpc TARGET_ARCH=powerpc64 before trying buildkernel. Similarly if buildworld is going to be done then make toolchain KERNCONF=GENERIC64 TARGET=powerpc TARGET_ARCH=powerpc64 should be done first. These put in place a tailored gcc 4.2.1 build into the appropriate part of the /usr/obj/... tree and once it exists the path used during make picks up the sub-tree-specific gcc 4.2.1. The defaults for this tree-specific gcc do not require command line options to specify the default context for the special TARGET_ARCH. Similarly for building for powerpc from powerpc64. === Mark Millard markmi at dsl-only.net _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-toolchain To unsubscribe, send any mail to "[email protected]"
