When testing with a dummy configure script, I can see that the following variables are set correctly: CC, CXX, AR, LD

However these values are left blank, while they are set in tools/building.py: NM, LDSHARED, RANLIB, EMSCRIPTEN_TOOLS, HOST_CC, HOST_CXX, HOST_CFLAGS, HOST_CXXFLAGS, PKG_CONFIG_LIBDIR, PKG_CONFIG_PATH, EMSCRIPTEN, PATH, ACLOCAL_PATH, CROSS_COMPILE.

Is this intentional? I would have expected that the toolchain sets up Bazel in a way that running bare configure is the same as emconfigure.