This package generates a crosstool toolchain for Bazel that uses the currently activated compilers / linker as defined by the environment variables. It does take various conda(-forge) specifics into account for this. In addition to generating a toolchain, it also sets various environment variables that need to be set for the toolchain to work. Especially you will need to pass in the correct ${TARGET_CPU} to ensure that cross-compiling also works.

In build.sh

source gen-bazel-toolchain bazel build --crosstooltop=//bazeltoolchain:toolchain --cpu ${TARGET_CPU} …