The most common issue is that this section was missed and not loaded. http://cblfs.cross-lfs.org/index.php/Bash_Startup_Files#10-pkg_config_path.sh_.28Multilib_Only.29 and http://cblfs.cross-lfs.org/index.php/Bash_Startup_Files#Non-Multilib_15-xorg.sh echo $PKG_CONFIG_PATH32 If it's empty then that's your issue