Date: Tue, 19 Jan 2016 02:35:54 -0800 From: Mark Millard <markmi@dsl-only.net> To: FreeBSD PowerPC ML <freebsd-ppc@freebsd.org>, FreeBSD Toolchain <freebsd-toolchain@freebsd.org> Subject: clang 3.8.0 based powerpc (32 bit) buildworld runs on a PowerMac! Message-ID: <DEF41968-FFC4-417D-A31A-E392CB888C35@dsl-only.net>
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I now have an SSD that contains: 0) installkernel material from a gcc 4.2.1 based buildkernel 1) installworld material from a clang 3.8.0 based buildworld (clang 3.8.0, libc++, etc.) It boots and seems to be operating fine after booting --in both a G5 and = a G4 PowerMac. Apparently the clang code generation has been updated to not require an = explicit -mlongcall. I had to remove those since clang rejects them on = command lines. It linked without complaint (and later seems to be = running fine). (I've seen llvm review notes mentioning the "medium = model" or some phrase like that for powerpc.) (I've not been able to buildkernel yet for powerpc (non-64) from my = amd64 environment: rejected command lines for other issues. Thus the = current limitation to buildworld.) To get to (1) I did the following sort of sequence: (The first few steps deal with other issues in order to have sufficient = context.) A) Started by installing the latest powerpc (non-64) snapshot. ( = http://ftp1.freebsd.org/pub/FreeBSD/snapshots/ISO-IMAGES/11.0/FreeBSD-11.0= -CURRENT-powerpc-20160113-r293801-disc1.iso ) (I had to use a PowerMac with video hardware that vt would handle.) (Basic display, no X-windows involvement here.) B) Rebuild, including using my usual kernel configuration that has both vt and sc. I did this based on projects/clang380-import -r294201 /usr/src but still using gcc 4.2.1 (native on the PowerMac). The configuration turns off kernel debugging extras too. C) installkernel, installworld, etc., set to use sc instead of vt, and = rebooted. (As of this I could use the SSD in more PowerMacs by using sc instead = of vt via a /boot/loader.conf assignment.) D) dump/restore the file systems to another SSD (after partitioning it). Adjust the host name and the like on the copy. (This copy later ends up having new installworld materials overlaid.) E) In a projects/clang380-import -r294201 amd64 environment, buildworld = for TARGET_ARCH=3Dpowerpc . WITH_LIBCPLUSPLUS=3D and clang related = material built, gcc 4.2.1 related material not built. WITH_BOOT=3D as well. I choose WITHOUT_DEBUG=3D and WITHOUT_DEBUG_FILES=3D . (I've not tried = enabling them yet.) binutils is not from ports. F) Use DESTDIR=3D with installworld to an initially empty directory = tree. tar the tree. =20 G) Transfer the tar file to the PowerMac. Mount the to-be-updated SSD to /mnt and /mnt/var. After chflags -R noschg on /mnt and /mnt/var use tar xpf to replace things from the buildworld on /mnt and /mnt/var. (This does leave older gcc 4.2.1 related materials in place.) H) Dismounts, shutdown, and then boot from the updated SSD. Note: I've never manage to get powerpc64-xtoolchain-gcc/powerpc64-gcc to = produce working 32-bit code. So I've never gotten this far via that = path. =3D=3D=3D Mark Millard markmi at dsl-only.net
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