dev-ml/cairo-ocaml: Fix #710574

Thanks to Attila Toth for the Debian patch, I applied this
alternative patch from the ml-overlay:
https://github.com/aballier/ml-overlay.git

Closes: https://bugs.gentoo.org/710574
Co-Author: Alexis Ballier <aballier@gentoo.org>
Package-Manager: Portage-3.0.8, Repoman-3.0.1
Signed-off-by: Mark Wright <gienah@gentoo.org>

2 files changed, 105 insertions, 0 deletions

diff --git a/dev-ml/cairo-ocaml/cairo-ocaml-1.2.0-r1.ebuild b/dev-ml/cairo-ocaml/cairo-ocaml-1.2.0-r1.ebuild
new file mode 100644
index 000000000000..964ec3fc5b12
--- /dev/null
+++ b/dev-ml/cairo-ocaml/cairo-ocaml-1.2.0-r1.ebuild
@@ -0,0 +1,85 @@
+# Copyright 1999-2020 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+inherit findlib autotools
+
+DESCRIPTION="Ocaml bindings for the cairo vector graphics library"
+HOMEPAGE="https://www.cairographics.org/cairo-ocaml/"
+SRC_URI="https://cgit.freedesktop.org/cairo-ocaml/snapshot/${P}.tar.bz2"
+
+LICENSE="LGPL-2.1"
+SLOT="0/${PV}"
+KEYWORDS="~amd64 ~ppc ~x86 ~amd64-linux ~x86-linux"
+IUSE="doc examples gtk pango"
+
+RDEPEND="dev-lang/ocaml:=
+	x11-libs/cairo
+	gtk? ( dev-ml/lablgtk:2= )
+	pango? ( x11-libs/pango )"
+DEPEND="${RDEPEND}"
+
+# 3 patches from debian and one for automagic on libsvg-cairo
+PATCHES=(
+	"${FILESDIR}"/0001-Add-missing-libraries-used-by-the-stubs-to-CAIRO_LIB.patch \
+	"${FILESDIR}"/0002-Fix-Makefile-to-avoid-recompiling-files-in-usr.patch \
+	"${FILESDIR}"/0003-Fix-FTBFS-on-bytecode-architectures.patch \
+	"${FILESDIR}"/0004-no-automagic.patch
+)
+
+src_prepare() {
+	default
+	has_version '>=dev-lang/ocaml-4.06.0' && eapply "${FILESDIR}"/ocaml406.patch
+	AT_M4DIR=support eautoreconf
+}
+
+src_configure() {
+	econf \
+		$(use_with gtk) \
+		$(use_with pango pango-cairo) \
+		--without-svg-cairo
+}
+
+src_compile() {
+	emake -j1
+	use doc && emake doc
+}
+
+src_install() {
+	findlib_src_install
+	dodoc README ChangeLog
+	if use examples; then
+		insinto /usr/share/doc/${PF}/examples
+		doins test/*.ml
+	fi
+	# ocamlfind support
+	cat <<-EOF > META
+		name = "${PN}"
+		description = "${DESCRIPTION}"
+		requires = "bigarray"
+		version = "${PV}"
+		archive(byte) = "cairo.cma"
+		archive(native) = "cairo.cmxa"
+	EOF
+	if use gtk; then
+		cat <<-EOF >> META
+			package "lablgtk2" (
+				requires = "cairo lablgtk2"
+				archive(byte) = "cairo_lablgtk.cma"
+				archive(native) = "cairo_lablgtk.cmxa"
+			)
+		EOF
+	fi
+	if use pango; then
+		cat <<-EOF >> META
+			package "pango" (
+				requires = "cairo"
+				archive(byte) = "pango_cairo.cma"
+				archive(native) = "pango_cairo.cmxa"
+			)
+		EOF
+	fi
+	insinto /usr/$(get_libdir)/ocaml/cairo
+	doins META
+}
diff --git a/dev-ml/cairo-ocaml/files/ocaml406.patch b/dev-ml/cairo-ocaml/files/ocaml406.patch
new file mode 100644
index 000000000000..2ef9931463b0
--- /dev/null
+++ b/dev-ml/cairo-ocaml/files/ocaml406.patch
@@ -0,0 +1,20 @@
+Index: cairo-ocaml-1.2.0/src/cairo_png.ml
+===================================================================
+--- cairo-ocaml-1.2.0.orig/src/cairo_png.ml
++++ cairo-ocaml-1.2.0/src/cairo_png.ml
+@@ -7,13 +7,13 @@
+ (**************************************************************************)
+ 
+ external image_surface_create_from_stream_unsafe : 
+-  (string -> int -> unit) -> Cairo.image_surface = "ml_cairo_image_surface_create_from_png_stream_unsafe"
++  (bytes -> int -> unit) -> Cairo.image_surface = "ml_cairo_image_surface_create_from_png_stream_unsafe"
+ 
+ let image_surface_create_from_channel ic =
+   image_surface_create_from_stream_unsafe
+     (fun s n ->
+       for i = 0 to n - 1 do
+-	String.unsafe_set s i (input_char ic)
++	Bytes.unsafe_set s i (input_char ic)
+       done)
+ 
+ let image_surface_create_from_file fname =