openbabel: use cmake-wxWidgets-gtk3 build_helper

srcpkgs/openbabel/template

@@ -5,6 +5,7 @@ revision=7
 _ver=${version//./-}
 wrksrc=${pkgname}-${pkgname}-${_ver}
 build_style=cmake
+build_helper=cmake-wxWidgets-gtk3
 hostmakedepends="pkg-config"
 makedepends="cairo-devel libxml2-devel eigen3.2 wxWidgets-gtk3-devel"
 short_desc="The Open Source Chemistry Toolbox"
@@ -18,17 +19,6 @@ if [ "$CROSS_BUILD" ]; then
 	hostmakedepends+=" python"
 fi
 
-pre_configure() {
-	# workaround for cmake to find wx-config-gtk3
-	if [ "$CROSS_BUILD" ]; then
-		# cannot override wxWidgets_CONFIG_EXECUTABLE set in
-		# the cross toolchain file otherwise
-		ln -s ${XBPS_WRAPPERDIR}/wx-config{-gtk3,}
-	else
-		sed -i "1i\SET(wxWidgets_CONFIG_EXECUTABLE wx-config-gtk3)" CMakeLists.txt
-	fi
-}
-
 openbabel-devel_package() {
 	depends="${sourcepkg}>=${version}_${revision}"
 	short_desc+=" - development files"