Date: Sun, 1 Sep 2013 19:01:29 -0700 From: John-Mark Gurney <jmg@funkthat.com> To: Adrian Chadd <adrian@freebsd.org> Cc: freebsd-current <freebsd-current@freebsd.org>, "freebsd-mips@freebsd.org" <freebsd-mips@freebsd.org> Subject: Re: how do i cross build world/kernel with clang? Message-ID: <20130902020129.GD36239@funkthat.com> In-Reply-To: <CAJ-Vmom3cLdEei%2BjwNRx7n_MgU0H3X0LigagNzU567tyeHBd8Q@mail.gmail.com> References: <CAJ-Vmom3cLdEei%2BjwNRx7n_MgU0H3X0LigagNzU567tyeHBd8Q@mail.gmail.com>
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Adrian Chadd wrote this message on Sat, Aug 31, 2013 at 19:30 -0700:
> How do i cross-build a mips world/kernel with clang?
>
> ie, how do I tell the build system to build a mips targetted clang instead
> of gcc and use that to build everything?
I finally figured out why my advice didn't work for you the other day..
It's because if you specify WITH_CLANG_IS_CC=YES, it doesn't imply
WITH_CLANG=YES... and clang is turned off by default for mips...
# make TARGET_ARCH=mips -j 8 WITH_CLANG_IS_CC=YES WITH_CLANG=YES toolchain
[...]
# make buildenv TARGET_ARCH=mips WITH_CLANG_IS_CC=YES
Entering world for mips:mips
# cc --version
FreeBSD clang version 3.3 (tags/RELEASE_33/final 183502) 20130610
Target: mips-unknown-freebsd10.0
Thread model: posix
The WITH_CLANG_IS_CC=YES is probably unnecessary on the buildenv
command...
Though the toolchain build failed, as apparently there are issues w/
clang, mips and libc:
--- libc.so.7 ---
/usr/obj/mips.mips/usr/src/tmp/usr/bin/ld: /usr/obj/mips.mips/usr/src/tmp/usr/li
b/crtbeginS.o: warning: linking PIC files with non-PIC files
/usr/obj/mips.mips/usr/src/tmp/usr/bin/ld: /usr/obj/mips.mips/usr/src/tmp/usr/li
b/crtn.o: warning: linking PIC files with non-PIC files
exect.So: In function `exect':
(.text+0x18): relocation truncated to fit: R_MIPS_PC16 against `__cerror'
[...]
--
John-Mark Gurney Voice: +1 415 225 5579
"All that I will do, has been done, All that I have, has not."
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