dev-python/sip: backport %MinimumABIVersion patch

Bug: https://bugs.gentoo.org/981016
Signed-off-by: David Seifert <soap@gentoo.org>

dev-python/sip/files/sip-6.16.1-legacy-abi-without-minimum.patch

@@ -0,0 +1,27 @@
+From 09598895c607f3e41f0249ade217ace0a4da6437 Mon Sep 17 00:00:00 2001
+From: Phil Thompson <phil@riverbankcomputing.com>
+Date: Sun, 23 Aug 2026 12:18:00 +0100
+Subject: [PATCH] Bug fixes
+
+- Fixed a regression in SIP v6.16.1 that meant that bindings using legacy
+ABIs would not build if they didn't specify `%MinimumABIVersion`.
+Resolves #114
+---
+ sipbuild/generator/parser/parser_manager.py | 4 ++++
+ 1 file changed, 4 insertions(+)
+
+diff --git a/sipbuild/generator/parser/parser_manager.py b/sipbuild/generator/parser/parser_manager.py
+index 8f2501ff..83c63310 100644
+--- a/sipbuild/generator/parser/parser_manager.py
++++ b/sipbuild/generator/parser/parser_manager.py
+@@ -1938,6 +1938,10 @@ def _finalise_abi_version(self):
+                 # We have no minimum version information from which to derive a
+                 # major version so use the default.
+                 major = DEFAULT_ABI_MAJOR
++        elif major <= 13 and not minimums:
++            # Allow older ABIs that don't specify %MinimumABIVersion.  This
++            # case can be removed in SIP v7.
++            pass
+         else:
+             # Check that this major version is supported and that any minor
+             # version meets the minimum requirements.

dev-python/sip/sip-6.16.1-r1.ebuild

@@ -0,0 +1,49 @@
+# Copyright 1999-2026 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+DISTUTILS_USE_PEP517=setuptools
+PYTHON_COMPAT=( python3_{12..15} )
+inherit distutils-r1
+
+DESCRIPTION="Python bindings generator for C/C++ libraries"
+HOMEPAGE="https://github.com/Python-SIP/sip/"
+SRC_URI="
+	https://github.com/Python-SIP/sip/archive/refs/tags/${PV}.tar.gz
+		-> ${P}.gh.tar.gz
+"
+
+LICENSE="BSD-2 BSD"
+SLOT="5"
+KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~loong ~ppc ~ppc64 ~riscv ~sparc ~x86"
+
+RDEPEND="
+	dev-python/packaging[${PYTHON_USEDEP}]
+	dev-python/setuptools[${PYTHON_USEDEP}]
+"
+BDEPEND="
+	>=dev-python/setuptools-scm-8[${PYTHON_USEDEP}]
+"
+
+PATCHES=(
+	# https://github.com/Python-SIP/sip/issues/114
+	"${FILESDIR}/${P}-legacy-abi-without-minimum.patch"
+)
+
+distutils_enable_sphinx docs \
+	dev-python/myst-parser \
+	dev-python/sphinx-rtd-theme
+
+EPYTEST_PLUGINS=()
+distutils_enable_tests pytest
+
+python_test() {
+	# the latest ABI version gets tested by default, but ABI 14
+	# requires python3.15 or higher
+	local epytestargs=()
+	[[ ${EPYTHON} =~ python3.1[2-4]t? ]] &&
+		epytestargs=( --sip-abi-version=13 )
+
+	epytest "${epytestargs[@]}"
+}