system/yelp: add webkit2gtk4.1 support

Signed-off-by: Willy Sudiarto Raharjo <willysr@slackbuilds.org>

system/yelp/README

@@ -2,6 +2,7 @@ yelp allows you to view documentation regarding GNOME and other
 components through a variety of formats
 
 Conflict warning: webkit2gtk and webkit2gtk4.1 conflict with each
-other. Since this depends on webkit2gtk (with 4.0 API), yelp cannot
-be used with (or even installed on the same system as) software that
-requires webkit2gtk4.1.
+other. If this is build with webkit2gtk4.1 instead of webkit2gtk,
+any software that uses it and it's deps must also be built with
+webkit2gtk4.1/soup3 instead of webkit2gtk/soup2
+

system/yelp/yelp.SlackBuild

@@ -26,7 +26,7 @@ cd $(dirname $0) ; CWD=$(pwd)
 
 PRGNAM=yelp
 VERSION=${VERSION:-42.2}
-BUILD=${BUILD:-1}
+BUILD=${BUILD:-2}
 TAG=${TAG:-_SBo}
 PKGTYPE=${PKGTYPE:-tgz}
 
@@ -76,6 +76,11 @@ find -L . \
  \( -perm 666 -o -perm 664 -o -perm 640 -o -perm 600 -o -perm 444 \
  -o -perm 440 -o -perm 400 \) -exec chmod 644 {} \;
 
+WKIT2="4-0"  #handle either webkit2gtk or webkit2gtk4.1
+if $(pkg-config --exists webkit2gtk-4.1); then
+   WKIT2="4-1"
+fi
+
 CFLAGS="$SLKCFLAGS" \
 CXXFLAGS="$SLKCFLAGS" \
 ./configure \
@@ -87,7 +92,7 @@ CXXFLAGS="$SLKCFLAGS" \
   --docdir=/usr/doc/$PRGNAM-$VERSION \
   --enable-static=no \
   --disable-schemas-compile \
-  --with-webkit2gtk-4-0 \
+  --with-webkit2gtk-$WKIT2 \
   --build=$ARCH-slackware-linux
 
 make