[LLVMdev] How to Cross Compile libcompiler_rt Static Library?

[Daniel Dilts]

I asked about this same question in the past (month or three ago).  It is
not possible to cross compile compiler-rt on Windows.  If you want to cross
compile you should use the make build system, not the CMake build system.

On Sun, Mar 29, 2015 at 9:26 AM, Chao Yan <yanchao2012 at gmail.com> wrote:

>
> 2015-03-29 3:33 GMT-05:00 Ed Schouten <ed at 80386.nl>:
>
>> I am cross-compiling compiler-rt for my specific use-case. That said,
>> I'm cross-compiling from x86-64 to x86-64, but for a different ABI.
>> This is what I use:
>>
>>
>> https://github.com/NuxiNL/cloudlibc/wiki/Building-runtime-libraries#user-content-compiler-rt
>>
>> -DCMAKE_CROSSCOMPILING=True
>>
>> As you can see, I'm using CMake. Works pretty well so far. Hopefully
>> something like this will work for you as well?
>>
>
> I tried "cmake ../compiler-rt -DCMAKE_C_COMPILER=clang
> -DCMAKE_CXX_COMPILER=clang++  -DLLVM_NATIVE_ARCH=ARM
> -DLLVM_TARGETS_TO_BUILD=ARM -DTARGET_TRIPLE=armv-none-linux-gnueabi
>  -DCMAKE_CROSSCOMPILING=True". It will still build X86_64 version.
>
> I also tried "cmake ../compiler-rt
> -DCMAKE_C_COMPILER=/usr/local/arm-2009q3/bin/arm-none-linux-gnueabi-gcc
> -DCMAKE_CXX_COMPILER=/usr/local/arm-2009q3/bin/arm-none-linux-gnueabi-g++
>  -DLLVM_NATIVE_ARCH=ARM -DLLVM_TARGETS_TO_BUILD=ARM
> -DTARGET_TRIPLE=armv-none-linux-gnueabi  -DCMAKE_CROSSCOMPILING=True
> ". the configure process generate errors:
>
> CMake Error at cmake/config-ix.cmake:111 (message):
> Cannot compile for x86_64:
>
> It seems that the cmake only works for X86 target?
>
> Thanks,
> Chao
>
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