use full path to compiler on macOS

Author: mattip

recipe/build-core.sh

@@ -13,6 +13,9 @@ if [[ "$target_platform" == osx* ]]; then
   # https://github.com/conda-forge/bazel-toolchain-feedstock/issues/18
   # delete the line from the template and the CXXFLAGS
   export CXXFLAGS="${CXXFLAGS/-stdlib=libc++ /} -Wno-vla-cxx-extension"
+  # Exchange the short exe name for the full path, used in
+  #   # bazel_toolchain/cc_wrapper.sh
+  export CLANG=$CC_FOR_BUILD
   sed -i"''" -e'/stdlib=libc/d' $CONDA_PREFIX/share/bazel_toolchain/CROSSTOOL.template
   source gen-bazel-toolchain
   cat >> .bazelrc <<EOF