[cfe-dev] choosing the gcc toolchain

[reed kotler]

rkotler at mipsswbrd006-le:~/caviumnativellvm/build$ 
./Release+Asserts/bin/clang++ -v -target mipsel-unknown-linux-gnu
clang version 3.5 (gitosis at dmz-portal.mips.com:clang.git 
f4481e0e412e3f817e65d5ce1c835381dc7a7773) 
(gitosis at dmz-portal.mips.com:llvm.git 
18fe44cb057e4b11533bd3f814b96fdca724baf0)
Target: mipsel-unknown-linux-gnu
Thread model: posix
Found candidate GCC installation: /usr/lib/gcc/mipsel-linux-gnu/4.4
Found candidate GCC installation: /usr/lib/gcc/mipsel-linux-gnu/4.4.6
Found candidate GCC installation: /usr/lib/gcc/mipsel-linux-gnu/4.4.7
Found candidate GCC installation: /usr/lib/gcc/mipsel-linux-gnu/4.6
Found candidate GCC installation: /usr/lib/gcc/mipsel-linux-gnu/4.6.3
Found candidate GCC installation: /usr/lib/gcc/mipsel-linux-gnu/4.7
Found candidate GCC installation: /usr/lib/gcc/mipsel-linux-gnu/4.7.2
Selected GCC installation: /usr/lib/gcc/mipsel-linux-gnu/4.7
Candidate multilib: .;@m32
Selected multilib: .;@m32
rkotler at mipsswbrd006-le:~/caviumnativellvm/build$

But it still does not find 4.7.2

Even with the patch from Friday it found 4.7.

On 03/03/2014 07:27 AM, Simon Atanasyan wrote:
> On Mon, Mar 3, 2014 at 7:15 PM, reed kotler <rkotler at mips.com> wrote:
>> rkotler at mipsswbrd006-le:~/caviumnativellvm/build$
>> ./Release+Asserts/bin/clang++ -v
>> clang version 3.5 (gitosis at dmz-portal.mips.com:clang.git
>> f4481e0e412e3f817e65d5ce1c835381dc7a7773)
>> (gitosis at dmz-portal.mips.com:llvm.git
>> 18fe44cb057e4b11533bd3f814b96fdca724baf0)
>> Target: mips64el-unknown-linux-gnu
> [...]
>
>> rkotler at mipsswbrd006-le:~/caviumnativellvm/build$  find /usr/lib -name
>> crtbegin.o
>> /usr/lib/gcc/mipsel-linux-gnu/4.7/crtbegin.o
>> /usr/lib/gcc/mipsel-linux-gnu/4.6/64/crtbegin.o
> That is why the clang selects toolchain version 4.6. You provide
> "mips64el-unknown-linux-gnu" triple but toolchain version 4.7 does not
> support 64 ABI. So the clang fall back to the 4.6.
>
> The first time you provide "mipsel-unknown-linux-gnu" triple and the
> fixed clang successfully selects toolchain version 4.7.
>