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Date:      Mon, 29 Aug 2016 09:09:26 -0600
From:      Sean Bruno <sbruno@freebsd.org>
To:        "freebsd-mips@freebsd.org" <freebsd-mips@freebsd.org>
Subject:   Clang/LLVM enabled builds for mips/mips64
Message-ID:  <88751282-c9d2-a673-18bc-184edc02efd0@freebsd.org>

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From: Sean Bruno <sbruno@freebsd.org>
To: "freebsd-mips@freebsd.org" <freebsd-mips@freebsd.org>
Message-ID: <88751282-c9d2-a673-18bc-184edc02efd0@freebsd.org>
Subject: Clang/LLVM enabled builds for mips/mips64

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Made some excellent progress over the last few weeks.  Here's a quick
status update.  I can boot(then crash) a mips64 kernel in QEMU via the
MALTA64 kernconf.  I can buildworld for mips32, but the kernel fails.

QEMU MALTA64 kernel crash:
http://people.freebsd.org/~sbruno/malta64_qemu_crash.txt

MIPS32 buildkernel failure:
http://people.freebsd.org/~sbruno/malta32_buildkernel.txt

Clang/LLVM patches that you need to apply when using and external toolcha=
in:
https://reviews.llvm.org/D23652
https://reviews.llvm.org/D23795
https://reviews.llvm.org/D23497

Minor Patch to enable inline ASM by default for mips targets:
http://people.freebsd.org/~sbruno/clang_mips_default_ias.diff

Build the FreeBSD tree in my project branch, its got a few things
changed to make it easier to build/test:
https://svnweb.freebsd.org/base/projects/mips64-clang/

Use a make.conf(change XCC/XCPP/XCXX to *your* build of clang)
MALLOC_PRODUCTION=3Dy
NO_WERROR=3Dy
TARGET=3Dmips
TARGET_ARCH=3Dmips64
KERNCONF=3DMALTA64
XCC=3D/home/sbruno/bsd/clang/build/bin/clang
XCPP=3D/home/sbruno/bsd/clang/build/bin/clang-cpp
XCXX=3D/home/sbruno/bsd/clang/build/bin/clang++
XCFLAGS=3D-Wno-typedef-redefinition -Wno-pointer-sign
-Wno-expansion-to-defined -Wno-address-of-packed-member -msoft-float -fpi=
c

Use a src.conf:
WITHOUT_CLANG=3D"YES"
WITHOUT_CLANG_EXTRAS=3D"YES"
WITHOUT_CLANG_FULL=3D"YES"
WITHOUT_CLANG_BOOTSTRAP=3D"YES"
WITHOUT_GCC=3D"YES"
WITHOUT_GDB=3D"YES"
WITHOUT_TESTS=3D"YES"
WITHOUT_RESCUE=3D"YES"



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