llvm-runtimes/clang-stdlib-config: Add 24.x live

Signed-off-by: Michał Górny <mgorny@gentoo.org>

llvm-runtimes/clang-stdlib-config/clang-stdlib-config-24.ebuild

@@ -0,0 +1,27 @@
+# Copyright 1999-2026 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+DESCRIPTION="Default C++ library configuration for clang"
+HOMEPAGE="https://clang.llvm.org/"
+S=${WORKDIR}
+
+LICENSE="public-domain"
+SLOT="${PV}"
+IUSE="default-libcxx"
+
+RDEPEND="
+	default-libcxx? ( >=llvm-runtimes/libcxx-${PV}[static-libs] )
+	!default-libcxx? ( sys-devel/gcc )
+"
+
+src_install() {
+	insinto "/etc/clang/${SLOT}"
+	newins - gentoo-stdlib.cfg <<-EOF
+		# This file is initially generated by ${CATEGORY}/${PN}.
+		# It is used to control the default C++ standard library used by clang.
+
+		--stdlib=$(usex default-libcxx libc++ libstdc++)
+	EOF
+}