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{ stdenv, lib, fetchurl, openssl, perl, libcap ? null, libseccomp ? null, pps-tools }:
assert stdenv.isLinux -> libcap != null;
assert stdenv.isLinux -> libseccomp != null;
let
withSeccomp = stdenv.isLinux && (stdenv.isi686 || stdenv.isx86_64);
in
stdenv.mkDerivation rec {
pname = "ntp";
version = "4.2.8p15";
src = fetchurl {
url = "https://www.eecis.udel.edu/~ntp/ntp_spool/ntp4/ntp-${lib.versions.majorMinor version}/ntp-${version}.tar.gz";
sha256 = "06cwhimm71safmwvp6nhxp6hvxsg62whnbgbgiflsqb8mgg40n7n";
};
# The hardcoded list of allowed system calls for seccomp is
# insufficient for NixOS, add more to make it work (issue #21136).
patches = [ ./seccomp.patch ];
configureFlags = [
"--sysconfdir=/etc"
"--localstatedir=/var"
"--with-openssl-libdir=${openssl.out}/lib"
"--with-openssl-incdir=${openssl.dev}/include"
"--enable-ignore-dns-errors"
"--with-yielding-select=yes"
] ++ lib.optional stdenv.isLinux "--enable-linuxcaps"
++ lib.optional withSeccomp "--enable-libseccomp";
buildInputs = [ libcap openssl perl ]
++ lib.optional withSeccomp libseccomp
++ lib.optional stdenv.isLinux pps-tools;
hardeningEnable = [ "pie" ];
postInstall = ''
rm -rf $out/share/doc
'';
meta = with lib; {
homepage = "http://www.ntp.org/";
description = "An implementation of the Network Time Protocol";
license = {
# very close to isc and bsd2
url = "https://www.eecis.udel.edu/~mills/ntp/html/copyright.html";
};
maintainers = with maintainers; [ eelco thoughtpolice ];
platforms = platforms.unix;
};
}
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