dev-python/gmpy: Fix mpfr-4.2.1 compatibility

Closes: https://bugs.gentoo.org/916390
Signed-off-by: Michał Górny <mgorny@gentoo.org>

dev-python/gmpy/Manifest

@@ -1,2 +1,3 @@
+DIST gmpy-2.1.5-cache.patch 19769 BLAKE2B 72d61ea00fda608ae92c5319828cb5c0003a69cd4be4bf3cde62574a93987b2316df5334d290eca7d48e44e423227d0b5a22c142c4a95b42aebb4560c3bf7ea6 SHA512 f16dbd78a99f27c6f588b814bb9b307429927eae9828fcea04225f163c1cd28968c2994689c4802dc0b619cdfd7c50401d1ec06c220756268af17499613fda1b
 DIST gmpy-2.1.5-py3.12.patch.gz 1817 BLAKE2B cbea3a9c662d52c5bfddb82ab5e920474a52c1dd715b3b9fecf55e5ee097297168ddb7961b6156e4c1f902e911890c77252d119c3651f345f01cad144ed44127 SHA512 26195e8e9a87147a05fd07fa325f262c2004fcba2b8857dbc87ca7a1e9e5e64b4a47d35be77edc263829e5df1db6a0acda6904307d01529eba832feb4f0f3f71
 DIST gmpy2-2.1.5.tar.gz 261709 BLAKE2B 50958868866fadc49c97534780fa491fadfaaea902f3fd4bd51f4e76a94602a6d030a1ee6685aac742e25b5fbe4865e1419307f7215c8fb553b166761d63607a SHA512 92e16359ee1df63faaeae4a3cbefe8cdbbc576d8eda377f08d59f12b70dfe9337a299686e85d1efee6c2f5b41fc4583643fecc68ea38a500c7f876c56fc169e7

dev-python/gmpy/files/gmpy-2.1.5-mpfr-4.2.1.patch

@@ -0,0 +1,31 @@
+From 68a6b489c3d8d95b2658a1ed884fb99f4bd955c1 Mon Sep 17 00:00:00 2001
+From: Sergey B Kirpichev <skirpichev@gmail.com>
+Date: Sun, 3 Sep 2023 02:35:19 +0300
+Subject: [PATCH] Exclude MPFR workaround for MPFR >= 4.2.1
+
+Co-authored-by: Vincent Lefevre <vincent@vinc17.net>
+
+Closes #418
+---
+ src/gmpy2_format.c | 2 ++
+ 1 file changed, 2 insertions(+)
+
+diff --git a/src/gmpy2_format.c b/src/gmpy2_format.c
+index 3e450c96..303bb7bf 100644
+--- a/src/gmpy2_format.c
++++ b/src/gmpy2_format.c
+@@ -592,12 +592,14 @@ GMPy_MPC_Format(PyObject *self, PyObject *args)
+     if (mpcstyle)
+         strcat(tempbuf, " ");
+     else {
++#if MPFR_VERSION < MPFR_VERSION_NUM(4,2,1)
+         /* Need to insert + if imag is nan or +inf. */
+         if (mpfr_nan_p(mpc_imagref(MPC(self))) ||
+             (mpfr_inf_p(mpc_imagref(MPC(self))) &&
+              mpfr_sgn(mpc_imagref(MPC(self))) > 0)) {
+             strcat(tempbuf, "+");
+         }
++#endif
+     }
+     strcat(tempbuf, imagbuf);
+     if (strlen(imagbuf) < 50 &&

dev-python/gmpy/gmpy-2.1.5-r2.ebuild

@@ -6,7 +6,7 @@ EAPI=8
 DISTUTILS_EXT=1
 DISTUTILS_USE_PEP517=setuptools
 PYPI_PN="gmpy2"
-PYTHON_COMPAT=( python3_{9..12} )
+PYTHON_COMPAT=( python3_{10..12} )
 
 inherit distutils-r1 pypi
 
@@ -15,8 +15,11 @@ HOMEPAGE="
 	https://github.com/aleaxit/gmpy/
 	https://pypi.org/project/gmpy2/
 "
-SRC_URI="${SRC_URI}
-	https://dev.gentoo.org/~grozin/${P}-py3.12.patch.gz"
+SRC_URI+="
+	https://dev.gentoo.org/~grozin/${P}-py3.12.patch.gz
+	https://github.com/tornaria/void-packages/raw/722b32aa405804b79a74256708de6a511e255b4b/srcpkgs/python3-gmpy2/patches/cleanup-object-caching.patch
+		-> ${P}-cache.patch
+"
 
 LICENSE="LGPL-3+"
 SLOT="2"
@@ -33,10 +36,14 @@ RDEPEND="
 
 distutils_enable_sphinx docs
 
-src_prepare() {
-	eapply "${WORKDIR}"/${P}-py3.12.patch
-	distutils-r1_src_prepare
-}
+PATCHES=(
+	"${WORKDIR}/${P}-py3.12.patch"
+	# https://github.com/aleaxit/gmpy/commit/7351e2eb1abf4b37a47a822eb3f3f29f90c7f854
+	# rebased by Void; needed for mpfr 4.2.1
+	"${DISTDIR}/${P}-cache.patch"
+	# https://github.com/aleaxit/gmpy/commit/68a6b489c3d8d95b2658a1ed884fb99f4bd955c1
+	"${FILESDIR}/${P}-mpfr-4.2.1.patch"
+)
 
 python_test() {
 	cd test || die