Re: how do i cross build world/kernel with clang?

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'
[...]

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  John-Mark Gurney				Voice: +1 415 225 5579

     "All that I will do, has been done, All that I have, has not."