@@ -19,14 +19,14 @@
 PATCHSCRIPTDIR="$(pwd)/patchscripts"
 PATCHDIR="$(pwd)/patches"
 export SRC SRCURL BUILDDIR OUTDIR INSTDIR PATCHSCRIPTDIR PATCHDIR
 
 # Set configure options for this sub-project
-LDFLAGS="${KC_TCL_LDFLAGS}"
-CFLAGS="${KC_TCL_CFLAGS}"
-CPPFLAGS="${KC_TCL_CPPFLAGS}"
-LIBS="${KC_TCL_LIBS}"
+LDFLAGS="${LDFLAGS} ${KC_TCL_LDFLAGS}"
+CFLAGS="${CFLAGS} ${KC_TCL_CFLAGS}"
+CPPFLAGS="${CPPFLAGS} ${KC_TCL_CPPFLAGS}"
+LIBS="${LIBS} ${KC_TCL_LIBS}"
 export LDFLAGS CFLAGS CPPFLAGS LIBS
 
 rm -rf 'build' 'out' 'inst'
 mkdir 'build' 'out' 'inst' || exit 1