dev-python/krb5: Backport cython-3 fix

Closes: https://bugs.gentoo.org/898686
Signed-off-by: Michał Górny <mgorny@gentoo.org>

dev-python/krb5/files/krb5-0.5.0-cython-3.patch

@@ -0,0 +1,26 @@
+From 0e843062ac3916ee0a36f59ba53caabba64cb062 Mon Sep 17 00:00:00 2001
+From: Matus Valo <matusvalo@gmail.com>
+Date: Wed, 15 Mar 2023 21:02:10 +0100
+Subject: [PATCH] Declare the function as noexcept when it is not raising
+ exception.
+
+Cython 3 will require noexcept keyword in the declaraction of the function not raising
+an exceptions.
+---
+ pyproject.toml      | 2 +-
+ src/krb5/_creds.pyx | 2 +-
+ 2 files changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/src/krb5/_creds.pyx b/src/krb5/_creds.pyx
+index a4a8a33..5b550e6 100644
+--- a/src/krb5/_creds.pyx
++++ b/src/krb5/_creds.pyx
+@@ -263,7 +263,7 @@ cdef krb5_error_code prompt_callback(
+     const char *banner,
+     int num_prompts,
+     krb5_prompt *prompts,
+-) with gil:
++) noexcept with gil:
+     try:
+         prompter = <Krb5Prompt>data
+ 

dev-python/krb5/krb5-0.5.0.ebuild

@@ -30,3 +30,8 @@ BDEPEND="
 "
 
 distutils_enable_tests pytest
+
+PATCHES=(
+	# https://github.com/jborean93/pykrb5/pull/27
+	"${FILESDIR}/${P}-cython-3.patch"
+)