enable xwidgets

e/emacs/emacs.SlackBuild

@@ -36,8 +36,6 @@ ARCH=${ARCH:-$(uname -m)}
 NUMJOBS=${NUMJOBS:-" -j3 "}
 BUILD=${BUILD:-1}
 
-X_TOOLKIT=${X_TOOLKIT:=gtk3}
-
 if [ "$ARCH" = "i486" ]; then
     SLKCFLAGS="-O2 -march=i486 -mtune=i686"
 elif [ "$ARCH" = "i686" ]; then
@@ -101,7 +99,8 @@ $SRCDIR/configure \
   --mandir=/usr/man \
   --infodir=/usr/info \
   --with-x \
-  --with-x-toolkit=$X_TOOLKIT \
+  --with-x-toolkit=gtk3 \
+  --with-xwidgets \
   --enable-link-time-optimization \
   --with-compress-install \
   --without-gconf \