dev-python/pygsl: add 2.6.5

Adds new version, taking into  account  some  build
changes.

Signed-off-by: bakedsnake <bakedsnake@vagrantz.xyz>

dev-python/pygsl/Manifest

@@ -1 +1,2 @@
 DIST pygsl-2.3.4.gh.tar.gz 1100233 BLAKE2B 0d59062ae7a6193225ac731a9a12a7c32df9c309a90e358fd77f7c957f8d27269e97634022036aa7b1d99e2c3703a7c45387c97557c4e28762310009626cb465 SHA512 4b510426bafc06c79742f0ef0ad07e31a7aa74c14bab88bd2f0a2acb125569ecf38aeab0eaf01590bd052474a4aa7f8b39a66f853e4bc4a392e126dcf4bfb359
+DIST pygsl-2.6.5.gh.tar.gz 648089 BLAKE2B a442a9f88f9c96436efe9de43825cdcb6181716cc86d63eeb95d972590049f660b0174a1a5be6b136823d0c1b2b821003440abf917d75ec84470a66ca3315dfd SHA512 9dec2edf29ede798f04e760e6e71b0c334798d9e5d76044dedfbabcb02d71a63eb45f6adc1bc94f7723985a758ddf0bb3967e46fa846fd0449709edb4103ed0e

dev-python/pygsl/files/numpy-casts.patch

@@ -0,0 +1,24 @@
+From 566d44d80f717f766c1df3b113c5b00027d72324 Mon Sep 17 00:00:00 2001
+From: bakedsnake <bakedsnake@vagrantz.xyz>
+Date: Sat, 15 Aug 2026 04:31:20 +0200
+Subject: [PATCH] Cast to object pointer to fix build error
+# https://github.com/pygsl/pygsl/pull/102
+
+--- a/src/transform/arraycopy.c
++++ b/src/transform/arraycopy.c
+@@ -411,6 +411,6 @@
+	}
+ 
+-	m = master;
++	m = (PyArrayObject *) master;
+	assert(m);
+	assert(
+		PyArray_TYPE(m) == PyGSL_TRANSFORM_MODE_SWITCH(mode, NPY_CDOUBLE, NPY_CFLOAT)
+@@ -432,6 +432,6 @@
+		}else{
+			FUNC_MESS("Copying input to output array");
+			/* Check if it is an array of the approbriate size */
+-			s = shadow;
++			s = (PyArrayObject *) shadow;
+			if((PyGSL_array_check((PyObject *) s)) && (PyArray_NDIM(s) == 1)
+				&& (PyArray_TYPE(s) == PyArray_TYPE(m))

dev-python/pygsl/pygsl-2.6.5.ebuild

@@ -0,0 +1,52 @@
+# Copyright 1999-2026 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+DISTUTILS_EXT=1
+DISTUTILS_USE_PEP517=meson-python
+PYTHON_COMPAT=( python3_{12..14} )
+
+inherit distutils-r1
+
+DESCRIPTION="Python interface for the GNU scientific library (gsl)"
+HOMEPAGE="https://github.com/pygsl/pygsl"
+SRC_URI="https://github.com/pygsl/pygsl/archive/v${PV}/${PN}.tar.gz -> ${P}.gh.tar.gz"
+
+LICENSE="GPL-2"
+SLOT="0"
+KEYWORDS="~amd64 ~x86"
+
+IUSE="examples"
+# Tests are also failing upstream
+# https://github.com/pygsl/pygsl/issues/15
+RESTRICT="test"
+
+BDEPEND="
+	dev-python/cython[${PYTHON_USEDEP}]
+"
+
+DEPEND="
+	dev-python/numpy[${PYTHON_USEDEP}]
+	sci-libs/gsl
+	dev-lang/swig
+"
+
+PATCHES=( "${FILESDIR}/numpy-casts.patch" )
+
+EPYTEST_PLUGINS=( )
+
+distutils_enable_sphinx doc dev-python/sphinx-rtd-theme
+distutils_enable_tests pytest
+
+src_configure() {
+	# Relative paths don't work in this case, so we give it a full path
+	sed -i "s|'-I../typemaps'|'-I${S}/typemaps'|" meson.build \
+		|| die "Failed to patch typemaps"
+	distutils-r1_src_configure
+}
+
+src_install() {
+	use examples && dodoc -r examples
+	distutils-r1_src_install
+}