On 25/09/2019 10:30, Robert Yang wrote: > TCL_INCLUDE_PATH = "" > TCL_INCLUDE_PATH_class-target = "--with-tclinclude=${STAGING_INCDIR}/tcl8.6" > +TCL_INCLUDE_PATH_class-nativesdk = "--with-tclinclude=${STAGING_INCDIR}/tcl8.6" Did you test just always passing --with-tclinclude=... in all classes? Ross