net-analyzer/ngrep: add 1.47_p20241209

Was going to backport the C23 commit from master but the bundled
regex is broken yet is built unconditionally because of both:
a) a line in the ebuild,
b) broken build system.

So take a snapshot as Fedora did to fix that and a bunch of other issues.

Closes: https://bugs.gentoo.org/943951
Signed-off-by: Sam James <sam@gentoo.org>

net-analyzer/ngrep/Manifest

@@ -1 +1,2 @@
 DIST ngrep-1.47.tar.gz 187067 BLAKE2B 4fa47ed343b88e84fb5a3ab6e4dc8139cb008ffcbea901a67664335ad76d36e975e037620cebb1b204ba22e5b139e822c7cfbc74a061fc6cacae631be3f87a52 SHA512 47ba65878df6b555701c866721a8a935eabdcce636d398284cbfe5f63baf68c62d994a2f373ea4fc8f44fbed3eecee149f2ee48d39c71c04d34e5a088db8c657
+DIST ngrep-1.47_p20241209.gh.tar.gz 187290 BLAKE2B 4a58268a75b40ab31014de4bac48a6078090e99afea157e4794893d67d9496bf0e82f3930a7e2e26db9d86fc90eeabccd60356b2b0581f47b12c3cf5f300b567 SHA512 4c555ddb7e5427350f2767f45553565b07b312899139b4d6d9001470ee57ce890072d15ea0523c48b775d5196b498f06a5a3fe9a307eaa3d73416b2a9ab2dc81

net-analyzer/ngrep/ngrep-1.47_p20241209.ebuild

@@ -0,0 +1,61 @@
+# Copyright 1999-2025 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+inherit autotools
+
+DESCRIPTION="A grep for network layers"
+HOMEPAGE="https://github.com/jpr5/ngrep"
+if [[ ${PV} == *_p* ]] ; then
+	NGREP_COMMIT="b2e3ba3c5a593abf203e65a407c3a9de0f998d4a"
+	SRC_URI="https://github.com/jpr5/ngrep/archive/${NGREP_COMMIT}.tar.gz -> ${P}.gh.tar.gz"
+	S="${WORKDIR}"/${PN}-${NGREP_COMMIT}
+else
+	SRC_URI="https://github.com/jpr5/ngrep/archive/V${PV/./_}.tar.gz -> ${P}.tar.gz"
+	S="${WORKDIR}/${P/./_}"
+fi
+
+LICENSE="ngrep"
+SLOT="0"
+KEYWORDS="~alpha ~amd64 ~arm ~hppa ~ppc ~ppc64 ~s390 ~sparc ~x86 ~amd64-linux ~x86-linux ~ppc-macos"
+IUSE="ipv6"
+
+DEPEND="
+	dev-libs/libpcre
+	net-libs/libpcap
+"
+RDEPEND="
+	${DEPEND}
+	acct-group/ngrep
+	acct-user/ngrep
+"
+
+PATCHES=(
+	"${FILESDIR}"/${PN}-1.47-regex.patch
+	"${FILESDIR}"/${PN}-1.47-clang16.patch
+)
+
+src_prepare() {
+	default
+
+	sed -i -e "s:configure.in:configure.ac:" regex*/{configure.in,Makefile.in} || die
+
+	eautoreconf
+}
+
+src_configure() {
+	local myeconfargs=(
+		$(use_enable ipv6)
+		--disable-pcap-restart
+		--enable-pcre
+		--with-dropprivs-user=ngrep
+		--with-pcap-includes="${EPREFIX}"/usr/include/pcap
+	)
+
+	econf "${myeconfargs[@]}"
+}
+
+src_compile() {
+	emake STRIPFLAG="${CFLAGS}"
+}