This help cross-compilation. You can do something like this now, to get a
native ECC that runs on the build machine, then build the rest for the
cross-compile target system:
rm -rf cmake-build-ecc
mkdir $_
cd $_
cmake ..
make ecc
cd ..
rm -rf cmake-build
mkdir $_
cd $_
cmake -DECC=/wherever/SeriousEngine/Sources/cmake-build-ecc/ecc ..
make
9581eeb02a