[LLVMdev] Build process ignores BUILD_CC?

[Eric Christopher]

Meador posted a (quite old) patch yesterday that does this. I'll
follow up in that thread.

-eric

On Wed, Mar 19, 2014 at 2:01 PM, Frank Winter <fwinter at jlab.org> wrote:
> Hi,
>
> I am still struggling to cross-compile LLVM (using trunk).
>
> My cross compiler builds code that cannot be run on the
> build host. Thus, I need to make use of BUILD_CC/CXX during
> configuration.
>
> My current setup is (heavily boiled down):
>
> ../configure CC=cc_cross CXX=cxx_cross BUILD_CC=cc_host
> BUILD_CXX=cxx_host (plus other flag stuff)
>
> The configuration runs fine. However, when calling 'make' it
> would construct the BuildTools in a way that doesn't pick
> up the host compilers:
>
> make
> llvm[0]: Constructing LLVMBuild project information.
>
> Looking into BuildTools/config.log I see a mere:
>
> ../configure --build=.. --host=.. --target=.. --disable-polly
>
> Configuration fails of course, because it picks up the
> host gcc which in my case has no C++11 support. Thus the
> whole thing fails.
>
> Am I right in thinking that in the BuildTools/ project it
> would be the right thing to do to copy the BUILD_* variables
> from the configuration as
>
> BUILD_CC -> CC
> BUILD_CXX -> CXX
> (dito for the flags)?
>
> If that's the case, then non of this is happening.
>
> Thanks for your thoughts,
> Frank
>
>
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