dev-lang/nprolog: bump to 4.21

Signed-off-by: Maciej Barć <xgqt@gentoo.org>

dev-lang/nprolog/Manifest

@@ -1,3 +1,4 @@
 DIST nprolog-4.05.gh.tar.gz 1294386 BLAKE2B 820bd52f2f5c47fd3fe873d94ca5dec177f43843cef649422e202debee922f2786ba5bd20c0f9806f5916ba74717d67febdc3dbb3b08616e22c5eba1085069aa SHA512 f6621fc30856bf38460395e7ebc73233b5387ea6aa450439b0979e50b2c8f1bde87ffd1a0468f5eca33abc3b3c2fe7bed080f8e82e090e213fb2afa488be3054
 DIST nprolog-4.08.gh.tar.gz 1308785 BLAKE2B 8e28698aa9972db9017f6b808aa75e723db555959904884a327ff4be4f1f229456157f747bd0fc32a3b4b7bd6441d1170633908577b90ef11511ca42b3840f6b SHA512 4ca35f7a5d010f2064b21694494edcfec1aef0823a2ce9601906a2ee77a1161a6b0e7642f49f214a8a7fc7c864e5ec2ba60de3dc33784876787a69ac281a9ac3
 DIST nprolog-4.20.gh.tar.gz 1312261 BLAKE2B cf0756158c02e58336e9b76a17de900cf6e3f0fbb25c0c5997a72030f97849d019e81222861824a285d11abb3d1dc13891f9ccb4ad1ad4f1e8c2f120e9dad0be SHA512 938958ed32566ae68a71060f6073f5bd3105db9647e99b9aaabe638a1aa4014d8ba350ae4fdcb8a42f80af4a1890f476ded0f5e1777a30ecce97004557fc6edb
+DIST nprolog-4.21.gh.tar.gz 1999169 BLAKE2B 306516073eeb660416bbde8a247691d413a459839f459803aa570e967216799d6f7822f0eb1f4d05adb365e14692fe59889a8461799608ab2ba5f2034a46f564 SHA512 5afdb00a1f32aeb17cfa8b1fb1d3dc2fb1402f7bb814ef0f1db747968e086c0b4533c6e11754d5855f35664bdff44aca95ca3c611b45b3dd8f1f34c7a6202fab

dev-lang/nprolog/nprolog-4.21.ebuild

@@ -0,0 +1,54 @@
+# Copyright 1999-2025 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+inherit toolchain-funcs
+
+DESCRIPTION="Interpreter and compiler to be compatible with Arity/Prolog32"
+HOMEPAGE="https://github.com/sasagawa888/nprolog/"
+
+if [[ "${PV}" == *9999* ]] ; then
+	inherit git-r3
+
+	EGIT_REPO_URI="https://github.com/sasagawa888/${PN}"
+else
+	SRC_URI="https://github.com/sasagawa888/${PN}/archive/refs/tags/v${PV}.tar.gz
+		-> ${P}.gh.tar.gz"
+
+	KEYWORDS="~amd64 ~x86"
+fi
+
+LICENSE="BSD-2"
+SLOT="0"
+IUSE="doc"
+
+DOCS=( README{,-ja}.md )
+
+src_prepare() {
+	if [[ -f edlog ]] ; then
+		rm edlog || die
+	fi
+
+	default
+}
+
+src_compile() {
+	emake CC="$(tc-getCC)" CFLAGS="${CFLAGS}" LDFLAGS="${LDFLAGS}"
+}
+
+src_install() {
+	exeinto /usr/bin
+	doexe npl
+
+	insinto "/usr/share/${PN}"
+	doins -r example library
+
+	if use doc ; then
+		DOCS+=( document )
+
+		docompress -x "/usr/share/doc/${PF}/document"
+	fi
+
+	einstalldocs
+}