config.enable_assertions = @ENABLE_ASSERTIONS@
config.targets_to_build = "@TARGETS_TO_BUILD@"
config.llvm_bindings = "@LLVM_BINDINGS@"
+config.host_os = "@HOST_OS@"
+config.host_arch = "@HOST_ARCH@"
# Support substitution of the tools_dir with user parameters. This is
# used when we can't determine the tool dir at configuration time.