gtk-sharp2: fix build

srcpkgs/gtk-sharp2/patches/ftbfs.patch

@@ -0,0 +1,11 @@
+--- sample/test/TestRange.cs
++++ sample/test/TestRange.cs
+@@ -9,6 +9,8 @@
+ using System;
+ 
+ using Gtk;
++// disambiguate, Gtk.Range vs System.Range
++using Range=Gtk.Range;
+ 
+ namespace WidgetViewer {
+ 

srcpkgs/gtk-sharp2/template

@@ -5,7 +5,7 @@ revision=2
 wrksrc="gtk-sharp-${version}"
 build_style=gnu-configure
 configure_args="--disable-static"
-hostmakedepends="pkg-config mono"
+hostmakedepends="pkg-config automake libtool mono"
 makedepends="mono-devel gtk+-devel libglade-devel"
 maintainer="John <johnz@posteo.net>"
 short_desc="Graphical User Interface Toolkit for mono and .Net (Gtk#)"
@@ -13,3 +13,18 @@ license="LGPL-2.1-only"
 homepage="https://www.mono-project.com/docs/gui/gtksharp/"
 distfiles="https://download.mono-project.com/sources/gtk-sharp212/gtk-sharp-${version}.tar.gz"
 checksum=02680578e4535441064aac21d33315daa009d742cab8098ac8b2749d86fffb6a
+
+if [ "$XBPS_TARGET_ENDIAN" = "be" ]; then
+	_have_mdoc="no"
+elif [[ $XBPS_TARGET_MACHINE == ppc* ]]; then
+	_have_mdoc="no"
+fi
+
+pre_configure() {
+	# mdoc is not shipped on ppc64le and all BE because it needs roslyn
+	if [ "$_have_mdoc" = "no" ]; then
+		sed "s/enable_monodoc=yes/enable_monodoc=no/" -i configure.in
+	fi
+
+	autoreconf -i
+}