[llvm-dev] [PATCH] [CMAKE] Allow a toolchain file for the host when cross-compiling

Chuck Atkins via llvm-dev llvm-dev at lists.llvm.org
Thu Nov 19 11:35:06 PST 2015

Scratch the first one, it's got some typos. This is the one I meant to
upload.  I've been using it for cross-compiling on Cray.

- Chuck

On Thu, Nov 19, 2015 at 1:17 PM, Chuck Atkins <chuck.atkins at kitware.com>

> The current behavior is to not specify any toolchain and invoke CMake
> without additional arguments for configuring the NATIVE portion of the
> build.  However, CMake will actually set the CC, CXX, and FC
> environment variables to full paths of the compilers in the
> CMAKE_{C,CXX,Fortran}_COMPILER CMake variables inside the CMake process.
> This results in those variables being propagated to any execute_process
> calls so without explicitly providing a separate toolchain file, the
> configure step for the NATIVE host will pick up the compilers used by
> the cross-compile toolchain intended for the target CPU.
> ---
>  cmake/modules/CrossCompile.cmake | 14 ++++++++++----
>  1 file changed, 10 insertions(+), 4 deletions(-)
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