webkit-gtk3: use bison25 to fix build; add patch for parallel build.

srcpkgs/webkit-gtk3/patches/webkit-gtk-1.7.90-parallel-make-hack.patch

@@ -0,0 +1,20 @@
+https://bugs.webkit.org/show_bug.cgi?id=79498
+
+--- GNUmakefile.am
++++ GNUmakefile.am
+@@ -285,6 +285,15 @@
+ all-local: stamp-po
+ 	$(mkdir_p) $(top_builddir)/$(DEPDIR)/DerivedSources
+ 
++# Horrible hack to enable workaround for parallel make failure
++all-built-sources-local: $(BUILT_SOURCES) autotoolsconfig.h
++
++all-ltlibraries-local: GNUmakefile $(LTLIBRARIES)
++
++all-programs-local: GNUmakefile $(PROGRAMS)
++
++all-data-local: GNUmakefile $(DATA)
++
+ # remove built sources and program directories
+ clean-local:
+ 	-rm -rf $(GENPROGRAMS)

srcpkgs/webkit-gtk3/template

@@ -3,10 +3,11 @@ pkgname=webkit-gtk3
 version=1.8.1
 revision=3
 wrksrc=webkit-${version}
-makedepends="perl pkg-config intltool which gperf flex jpeg-devel
-libpng-devel>=1.5.10 sqlite-devel gtk+-devel gtk+3-devel
+makedepends="automake perl pkg-config intltool which gperf bison25 flex
+jpeg-devel libpng-devel>=1.5.10 sqlite-devel gtk+-devel gtk+3-devel
 gst-plugins-base-devel libsoup-devel libxslt-devel icu-devel>=49
 enchant-devel geoclue-devel gobject-introspection"
+subpackages="webkit-gtk webkit-gtk-devel $pkgname-devel"
 short_desc="GTK+3 port of the WebKit browser engine"
 maintainer="Juan RP <xtraeme@gmail.com>"
 homepage="http://webkitgtk.org/"
@@ -22,10 +23,9 @@ long_desc="
 
  This is the GTK3+ port of the engine."
 
-disable_parallel_build=yes
-subpackages="webkit-gtk webkit-gtk-devel $pkgname-devel"
-
 do_configure() {
+	autoreconf -fi -I Source/autotools
+
 	local args="--enable-video --enable-jit \
 		--with-font-backend=freetype --enable-introspection \
 		--with-unicode-backend=icu --disable-schemas-compile \
@@ -44,7 +44,17 @@ do_build() {
 	for ver in 2 3; do
 		msg_normal "Building GTK+${ver} version...\n"
 		cd ${wrksrc}/build-gtk${ver}
-		make ${makejobs} || return 1
+		# Horrible hack to build in parallel (Gentoo)
+		# see https://bugs.webkit.org/show_bug.cgi?id=79498
+		make all-built-sources-local
+		make ${makejobs} all-ltlibraries-local
+		make ${makejobs} all-programs-local
+		if [ "$ver" = "2" ]; then
+			make ${makejobs} WebKit-1.0.gir
+		else
+			make ${makejobs} WebKit-3.0.gir
+		fi
+		make ${makejobs} all-data-local
 	done
 }