Add <buildroot dir>/staging_dir/host/bin and <buildroot dir>/staging_dir/toolchain-<platform>-<gcc_ver>-<libc_ver>/bin in front of your PATH variable in ~/.bashrc. The staging directory is created shortly after starting the build and the toolchain directory is created when the toolchain build begins. The build spawns multiple shells, some of which expect the toolchain binaries to be present in the PATH.