sci-chemistry/cluster: Fix error: ISO C++17 does not allow register storage class

Closes: https://bugs.gentoo.org/898132
Signed-off-by: Brahmajit Das <brahmajit.xyz@gmail.com>
Closes: https://github.com/gentoo/gentoo/pull/31488
Signed-off-by: Andrew Ammerlaan <andrewammerlaan@gentoo.org>

2 files changed, 54 insertions, 0 deletions

diff --git a/sci-chemistry/cluster/cluster-1.3.081231-r2.ebuild b/sci-chemistry/cluster/cluster-1.3.081231-r2.ebuild
new file mode 100644
index 000000000000..63f38eed67d2
--- /dev/null
+++ b/sci-chemistry/cluster/cluster-1.3.081231-r2.ebuild
@@ -0,0 +1,31 @@
+# Copyright 1999-2023 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+inherit toolchain-funcs
+
+DESCRIPTION="Build lists of collections of interacting items"
+HOMEPAGE="http://kinemage.biochem.duke.edu/software/index.php"
+SRC_URI="http://kinemage.biochem.duke.edu/downloads/software/${PN}/${PN}.${PV}.src.tgz"
+S="${WORKDIR}"/${PN}1.3src
+
+LICENSE="richardson"
+SLOT="0"
+KEYWORDS="~amd64 ~x86 ~amd64-linux ~x86-linux"
+
+PATCHES=(
+	"${FILESDIR}"/${PV}-ldflags.patch
+	"${FILESDIR}"/${PV}-includes.patch
+	"${FILESDIR}"/${PV}-drop-registers.patch
+)
+
+src_configure() {
+	tc-export CXX
+	default
+}
+
+src_install() {
+	newbin ${PN} molprobity-${PN}
+	dodoc README.cluster
+}
diff --git a/sci-chemistry/cluster/files/1.3.081231-drop-registers.patch b/sci-chemistry/cluster/files/1.3.081231-drop-registers.patch
new file mode 100644
index 000000000000..c00922591faa
--- /dev/null
+++ b/sci-chemistry/cluster/files/1.3.081231-drop-registers.patch
@@ -0,0 +1,23 @@
+Bug: https://bugs.gentoo.org/898132
+--- a/utility.cpp
++++ b/utility.cpp
+@@ -107,8 +107,8 @@ int compArgStr(const char *str, const char *arg, int min) {
+ }
+ 
+ int parseInteger(const char *str, int start, int len) {
+-	register int value = 0;
+-	register char ch;
++	int value = 0;
++	char ch;
+ 	int neg = 0, inside = 0;
+ 
+ 	if (!str || start < 0) { return 0; }
+@@ -136,7 +136,7 @@ int parseInteger(const char *str, int start, int len) {
+ double parseReal(const char *str, int start, int len) {
+    double value = 0.0, scale = 1.0, expscale = 1.0, expfact = 10.0;
+    int expval = 0;
+-   register char ch;
++   char ch;
+    int inside = 0, infract = 0, inexp = 0, insn = 0, esn = 0;
+ 
+    if (!str || start < 0) { return 0; }