net-analyzer/dhcp_probe: fix build with gcc 15

Closes: https://bugs.gentoo.org/945196
Signed-off-by: Alexey Sokolov <alexey+gentoo@asokolov.org>
Part-of: https://github.com/gentoo/gentoo/pull/45024
Signed-off-by: Sam James <sam@gentoo.org>

net-analyzer/dhcp_probe/dhcp_probe-1.3.1-r1.ebuild

@@ -0,0 +1,50 @@
+# Copyright 1999-2025 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+inherit autotools flag-o-matic toolchain-funcs
+
+DESCRIPTION="Discover DHCP and BootP servers on a directly-attached Ethernet network"
+HOMEPAGE="https://www.net.princeton.edu/software/dhcp_probe/"
+SRC_URI="https://www.net.princeton.edu/software/${PN}/${P}.tar.gz"
+
+LICENSE="GPL-2"
+SLOT="0"
+KEYWORDS="~amd64 ~x86"
+
+DEPEND="
+	net-libs/libnet
+	net-libs/libpcap"
+RDEPEND="${DEPEND}"
+
+PATCHES=(
+	"${FILESDIR}"/${PN}-1.3.1-respect-AR.patch
+	"${FILESDIR}"/${PN}-1.3.1-fix-configure-CPP.patch
+	"${FILESDIR}"/${PN}-1.3.1-gcc15.patch
+)
+
+src_prepare() {
+	default
+
+	# for AR patch
+	eautoreconf
+}
+
+src_configure() {
+	# configure uses CPP
+	tc-export CPP
+
+	use amd64 && append-cppflags -D__ARCH__=64
+
+	STRIP=true econf
+}
+
+src_install() {
+	default
+
+	dodoc extras/dhcp_probe.cf.sample "${FILESDIR}"/${PN}_mail
+
+	newinitd "${FILESDIR}"/${PN}.initd ${PN}
+	newconfd "${FILESDIR}"/${PN}.confd ${PN}
+}

net-analyzer/dhcp_probe/files/dhcp_probe-1.3.1-gcc15.patch

@@ -0,0 +1,14 @@
+Fix build with GCC 15
+https://bugs.gentoo.org/945196
+
+--- a/src/report.c
++++ b/src/report.c
+@@ -253,8 +253,6 @@ get_errmsg()
+ {
+ /*	Return pointer to static string which gives full filesystem error message.
+ */
+-	extern int errno;
+-	extern char *strerror();
+ 
+ 	return strerror(errno);
+ }