sci-libs/galib: Fix ISO C++17 does not allow register storage class

Closes: #32041
Closes: https://bugs.gentoo.org/898276
Signed-off-by: Brahmajit Das <brahmajit.xyz@gmail.com>
Signed-off-by: David Seifert <soap@gentoo.org>

sci-libs/galib/Manifest

@@ -1 +1,2 @@
+DIST galib-2.4.7-patches.tar.xz 4180 BLAKE2B 3e0f9bc5c7f3289c1839ef5c2151e72079e2ca19a884ce705bc723a379b76185bb5ebc83b5c465f6df2468e5ca8eaf18d3dbbd807ef9af5899f377d83a94535e SHA512 245fc139aed8f09ba39a0a78b0ed21ac6f8c7d33bdffe24f18f53f688beae00353ac0abfa3746ee733ee30efb1fbf4084b553e7a5b647f1a41fd019ab1218c1a
 DIST galib247.tgz 374912 BLAKE2B d6f0d757cee9a1c26eb4525862dc2e9761449492edb323ba30ea70cde95b72da2a90fad4a931ab1d07d8bc0fca2b62672357ee790b1e67f3e9b480d5aff26106 SHA512 9c2aca29f24d3f8401ba65c246a0ca7d1fa67e4f756a5258cdb0da111842ea2903c2d70cfd9d60823c9703bcb3415ca670a731924e99878d5536c2f7eb0faba4

sci-libs/galib/galib-2.4.7-r2.ebuild

@@ -0,0 +1,44 @@
+# Copyright 1999-2023 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+inherit toolchain-funcs
+
+MY_PV="${PV//\./}"
+
+DESCRIPTION="Library for genetic algorithms in C++ programs"
+HOMEPAGE="http://lancet.mit.edu/ga/"
+SRC_URI="
+	http://lancet.mit.edu/ga/dist/galib${MY_PV}.tgz
+	https://dev.gentoo.org/~soap/distfiles/${P}-patches.tar.xz"
+S="${WORKDIR}/${PN}${MY_PV}"
+
+LICENSE="BSD examples? ( GPL-2 )"
+SLOT="0"
+KEYWORDS="~amd64 ~x86 ~amd64-linux ~x86-linux"
+IUSE="doc examples"
+
+PATCHES=( "${WORKDIR}"/patches )
+
+src_configure() {
+	tc-export AR CXX
+	export LIBDIR="${EPREFIX}"/usr/$(get_libdir)
+	export INCDIR="${EPREFIX}"/usr/include
+}
+
+src_compile() {
+	emake lib
+	emake -C examples clean
+}
+
+src_install() {
+	use doc && HTML_DOCS=( doc/. )
+	if use examples; then
+		dodoc -r examples
+		find "${ED}"/usr/share/doc/${PF}/examples -iname 'makefile*' -delete || die
+		docompress -x /usr/share/doc/${PF}/examples
+	fi
+
+	default
+}