app-text/djvu: Fix C++17 does not allow register storage class

Closes: https://bugs.gentoo.org/894644
Signed-off-by: Brahmajit Das <brahmajit.xyz@gmail.com>
Closes: https://github.com/gentoo/gentoo/pull/32359
Signed-off-by: Joonas Niilola <juippis@gentoo.org>

2 files changed, 92 insertions, 0 deletions

diff --git a/app-text/djvu/djvu-3.5.28-r4.ebuild b/app-text/djvu/djvu-3.5.28-r4.ebuild
new file mode 100644
index 000000000000..8ca0e11bdbb9
--- /dev/null
+++ b/app-text/djvu/djvu-3.5.28-r4.ebuild
@@ -0,0 +1,71 @@
+# Copyright 1999-2023 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+inherit autotools flag-o-matic optfeature xdg
+
+MY_P="${PN}libre-${PV#*_p}"
+DESCRIPTION="DjVu viewers, encoders and utilities"
+HOMEPAGE="https://djvu.sourceforge.net/"
+SRC_URI="https://downloads.sourceforge.net/djvu/${MY_P}.tar.gz"
+S="${WORKDIR}/${MY_P%%.3}"
+
+LICENSE="GPL-2+"
+SLOT="0"
+KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~ia64 ~loong ~mips ~ppc ~ppc64 ~riscv ~s390 ~sparc ~x86 ~amd64-linux ~x86-linux ~ppc-macos ~x64-macos"
+IUSE="debug doc jpeg tiff xml"
+
+RDEPEND="jpeg? ( media-libs/libjpeg-turbo:= )
+	tiff? ( media-libs/tiff:= )"
+DEPEND="${RDEPEND}"
+
+# inkscape/rsvg-convert are used to generate icons at build-time only
+BDEPEND="app-arch/unzip
+	|| ( gnome-base/librsvg media-gfx/inkscape )"
+
+DOCS=( NEWS README )
+
+PATCHES=(
+	"${FILESDIR}"/${PN}-3.5.28-drop-register-keyword-clang16.patch
+)
+
+src_prepare() {
+	default
+	eautoreconf
+}
+
+src_configure() {
+	use debug && append-cppflags "-DRUNTIME_DEBUG_ONLY"
+
+	# We install all desktop files by hand.
+	econf \
+		$(use_enable xml xmltools) \
+		$(use_with jpeg) \
+		$(use_with tiff) \
+		--disable-desktopfiles
+}
+
+src_install() {
+	default
+
+	find "${ED}" -name '*.la' -delete || die
+
+	use doc && dodoc -r doc
+
+	# Install desktop files.
+	cd desktopfiles || die
+	for i in {22,32,48,64}; do
+		insinto /usr/share/icons/hicolor/${i}x${i}/mimetypes
+		newins prebuilt-hi${i}-djvu.png image-vnd.djvu.png
+	done
+
+	insinto /usr/share/mime/packages
+	doins djvulibre-mime.xml
+}
+
+pkg_postinst() {
+	xdg_pkg_postinst
+
+	optfeature "djviewer or browser plugin" app-text/djview
+}
diff --git a/app-text/djvu/files/djvu-3.5.28-drop-register-keyword-clang16.patch b/app-text/djvu/files/djvu-3.5.28-drop-register-keyword-clang16.patch
new file mode 100644
index 000000000000..dd86bb8bf130
--- /dev/null
+++ b/app-text/djvu/files/djvu-3.5.28-drop-register-keyword-clang16.patch
@@ -0,0 +1,21 @@
+Bug: https://bugs.gentoo.org/894644
+--- a/libdjvu/GBitmap.h
++++ b/libdjvu/GBitmap.h
+@@ -620,7 +620,7 @@ GBitmap::euclidian_ratio(int a, int b, int &q, int &r)
+ inline int
+ GBitmap::read_run(unsigned char *&data)
+ {
+-  register int z=*data++;
++  int z=*data++;
+   return (z>=RUNOVERFLOWVALUE)?
+     ((z&~RUNOVERFLOWVALUE)<<8)|(*data++):z;
+ }
+@@ -628,7 +628,7 @@ GBitmap::read_run(unsigned char *&data)
+ inline int
+ GBitmap::read_run(const unsigned char *&data)
+ {
+-  register int z=*data++;
++  int z=*data++;
+   return (z>=RUNOVERFLOWVALUE)?
+     ((z&~RUNOVERFLOWVALUE)<<8)|(*data++):z;
+ }