x11-misc/virtualgl: Fix ISO C++17 does not allow register storage cla…

…ss specifier

Closes: https://bugs.gentoo.org/898876
Signed-off-by: Brahmajit Das <brahmajit.xyz@gmail.com>

x11-misc/virtualgl/files/virtualgl-3.1-drop-register.patch

@@ -0,0 +1,53 @@
+https://github.com/VirtualGL/virtualgl/pull/233
+From: Brahmajit Das <brahmajit.xyz@gmail.com>
+Date: Thu, 1 Jun 2023 14:45:17 +0530
+Subject: [PATCH] Dropping use of register keyword
+
+The usage of register keyword was deprecated in c++14 and it's
+completely removed in c++17. Found will building virtualgl on gentoo
+with clang-16.
+
+Bug: https://bugs.gentoo.org/898876
+Signed-off-by: Brahmajit Das <brahmajit.xyz@gmail.com>
+--- a/server/fltk/src/Fl_Text_Buffer.cxx
++++ b/server/fltk/src/Fl_Text_Buffer.cxx
+@@ -1286,7 +1286,7 @@ int Fl_Text_Buffer::substitute_null_characters( char *string, int len ) {
+ ** routine if no substitution has been done.
+ */
+ void Fl_Text_Buffer::unsubstitute_null_characters( char *string ) {
+-  register char * c, subsChar = mNullSubsChar;
++  char * c, subsChar = mNullSubsChar;
+
+   if ( subsChar == '\0' )
+     return;
+--- a/server/fltk/src/Fl_arg.cxx
++++ b/server/fltk/src/Fl_arg.cxx
+@@ -314,7 +314,7 @@ without express or implied warranty.
+
+ static int ReadInteger(char* string, char** NextString)
+ {
+-  register int Result = 0;
++  int Result = 0;
+   int Sign = 1;
+
+   if (*string == '+')
+@@ -337,7 +337,7 @@ int XParseGeometry(const char* string, int* x, int* y,
+ 		   unsigned int* width, unsigned int* height)
+ {
+   int mask = NoValue;
+-  register char *strind;
++  char *strind;
+   unsigned int tempWidth = 0, tempHeight = 0;
+   int tempX = 0, tempY = 0;
+   char *nextCharacter;
+--- a/util/md5.c
++++ b/util/md5.c
+@@ -193,7 +193,7 @@ void MD5Final(unsigned char digest[16], struct MD5Context *ctx)
+  */
+ void MD5Transform(uint32 buf[4], uint32 in[16])
+ {
+-  register uint32 a, b, c, d;
++  uint32 a, b, c, d;
+
+   a = buf[0];
+   b = buf[1];

x11-misc/virtualgl/virtualgl-3.1-r1.ebuild

@@ -0,0 +1,101 @@
+# Copyright 1999-2023 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+inherit cmake-multilib flag-o-matic systemd
+
+if [[ ${PV} == *9999 ]] ; then
+	EGIT_REPO_URI="https://github.com/VirtualGL/${PN}.git"
+	inherit git-r3
+else
+	MY_PN="VirtualGL"
+	MY_P="${MY_PN}-${PV}"
+	S="${WORKDIR}/${MY_P}"
+	SRC_URI="mirror://sourceforge/project/${PN}/${PV}/${MY_P}.tar.gz"
+	KEYWORDS="~amd64 ~x86"
+fi
+
+DESCRIPTION="Run OpenGL applications remotely with full 3D hardware acceleration"
+HOMEPAGE="https://www.virtualgl.org/"
+
+SLOT="0"
+LICENSE="LGPL-2.1 wxWinLL-3.1 FLTK"
+IUSE=""
+
+RDEPEND="
+	media-libs/libjpeg-turbo[${MULTILIB_USEDEP}]
+	x11-libs/libX11[${MULTILIB_USEDEP}]
+	x11-libs/libXext[${MULTILIB_USEDEP}]
+	x11-libs/libXtst[${MULTILIB_USEDEP}]
+	x11-libs/libXv[${MULTILIB_USEDEP}]
+	x11-libs/xcb-util-keysyms[${MULTILIB_USEDEP}]
+	virtual/glu[${MULTILIB_USEDEP}]
+	virtual/opencl[${MULTILIB_USEDEP}]
+	virtual/opengl[${MULTILIB_USEDEP}]
+	amd64? ( abi_x86_32? (
+		>=media-libs/libjpeg-turbo-1.3.0-r3[abi_x86_32]
+		>=x11-libs/libX11-1.6.2[abi_x86_32]
+		>=x11-libs/libXext-1.3.2[abi_x86_32]
+		>=x11-libs/libXtst-1.2.3[abi_x86_32]
+		>=x11-libs/libXv-1.0.10[abi_x86_32]
+		x11-libs/xcb-util-keysyms[abi_x86_32]
+		>=virtual/glu-9.0-r1[abi_x86_32]
+		virtual/opencl[abi_x86_32]
+		>=virtual/opengl-7.0-r1[abi_x86_32]
+	) )
+"
+DEPEND="${RDEPEND}"
+
+PATCHES=(
+	"${FILESDIR}"/${PN}-3.1-drop-register.patch
+)
+
+src_prepare() {
+	# Use /var/lib, bug #428122
+	sed -e "s#/etc/opt#/var/lib#g" -i doc/unixconfig.txt doc/index.html doc/advancedopengl.txt \
+		server/vglrun.in server/vglgenkey server/vglserver_config || die
+
+	cmake_src_prepare
+}
+
+src_configure() {
+	# Completely breaks steam/wine for discrete graphics otherwise
+	# see https://github.com/VirtualGL/virtualgl/issues/16
+	append-ldflags "-Wl,--no-as-needed"
+
+	abi_configure() {
+		local mycmakeargs=(
+			-DCMAKE_INSTALL_DOCDIR=/usr/share/doc/"${PF}"
+			-DTJPEG_INCLUDE_DIR=/usr/include
+			-DCMAKE_INSTALL_LIBDIR=/usr/$(get_libdir)/VirtualGL
+			-DTJPEG_LIBRARY=/usr/$(get_libdir)/libturbojpeg.so
+			-DCMAKE_LIBRARY_PATH=/usr/$(get_libdir)
+		)
+		cmake_src_configure
+	}
+	multilib_parallel_foreach_abi abi_configure
+}
+
+src_install() {
+	cmake-multilib_src_install
+
+	# Make config dir
+	keepdir /var/lib/VirtualGL
+	fowners root:video /var/lib/VirtualGL
+	fperms 0750 /var/lib/VirtualGL
+	newinitd "${FILESDIR}/vgl.initd-r4" vgl
+	newconfd "${FILESDIR}/vgl.confd-r2" vgl
+
+	exeinto /usr/libexec
+	doexe "${FILESDIR}/vgl-helper.sh"
+	systemd_dounit "${FILESDIR}/vgl.service"
+
+	# Rename glxinfo to vglxinfo to avoid conflict with x11-apps/mesa-progs
+	# and eglinfo to veglinto because of conflict with mesa-progs[egl]
+	mv "${D}"/usr/bin/{,v}glxinfo || die
+	mv "${D}"/usr/bin/{,v}eglinfo || die
+
+	# Remove license files, bug 536284
+	rm "${D}"/usr/share/doc/${PF}/{LGPL.txt*,LICENSE*} || die
+}