net-nds/openldap: fix configure+build w/ clang 16

This affects the macro which ntp bundles too.

Closes: https://bugs.gentoo.org/871288
Bug: https://bugs.gentoo.org/871372
Bug: https://bugs.gentoo.org/882183
Signed-off-by: Sam James <sam@gentoo.org>

2 files changed, 936 insertions, 0 deletions

diff --git a/net-nds/openldap/files/openldap-2.6.3-clang16.patch b/net-nds/openldap/files/openldap-2.6.3-clang16.patch
new file mode 100644
index 000000000000..4d9210b1f0fe
--- /dev/null
+++ b/net-nds/openldap/files/openldap-2.6.3-clang16.patch
@@ -0,0 +1,139 @@
+https://bugs.gentoo.org/871288
+https://bugs.gentoo.org/871372
+
+From ee4983302d6f052e77ab0332d2a128d169c2eacb Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Arsen=20Arsenovi=C4=87?= <arsen@aarsen.me>
+Date: Tue, 15 Nov 2022 21:45:27 +0100
+Subject: [PATCH] Remove default-int/k&r declarations from the configure macros
+
+Recently, Clang tried to switch to having K&R prototypes and other
+non-strictly-conforming prototypes error out, as a result of C2x changes
+to the standard.  These have been located across many packages, and
+range in severity from mild compile errors to runtime misconfiguration
+as a result of broken configure scripts.
+
+This covers all the instances I could find by grepping around the
+codebase, and gets OpenLDAP building on my system.
+
+Bug: https://bugs.gentoo.org/871288
+--- a/build/openldap.m4
++++ b/build/openldap.m4
+@@ -360,9 +360,7 @@ AC_DEFUN([OL_PTHREAD_TEST_FUNCTION],[[
+ AC_DEFUN([OL_PTHREAD_TEST_PROGRAM],
+ [AC_LANG_SOURCE([OL_PTHREAD_TEST_INCLUDES
+ 
+-int main(argc, argv)
+-	int argc;
+-	char **argv;
++int main(int argc, char **argv)
+ {
+ OL_PTHREAD_TEST_FUNCTION
+ }
+@@ -484,7 +482,7 @@ AC_CACHE_CHECK([for compatible POSIX regex],ol_cv_c_posix_regex,[
+ #include <sys/types.h>
+ #include <regex.h>
+ static char *pattern, *string;
+-main()
++int main(void)
+ {
+ 	int rc;
+ 	regex_t re;
+@@ -511,7 +509,7 @@ AC_DEFUN([OL_C_UPPER_LOWER],
+ [AC_CACHE_CHECK([if toupper() requires islower()],ol_cv_c_upper_lower,[
+ 	AC_RUN_IFELSE([AC_LANG_SOURCE([[
+ #include <ctype.h>
+-main()
++int main(void)
+ {
+ 	if ('C' == toupper('C'))
+ 		exit(0);
+@@ -569,7 +567,7 @@ AC_DEFUN([OL_NONPOSIX_STRERROR_R],
+ 			]])],[ol_cv_nonposix_strerror_r=yes],[ol_cv_nonposix_strerror_r=no])
+ 	else
+ 		AC_RUN_IFELSE([AC_LANG_SOURCE([[
+-			main() {
++			int main(void) {
+ 				char buf[100];
+ 				buf[0] = 0;
+ 				strerror_r( 1, buf, sizeof buf );
+--- a/configure.ac
++++ b/configure.ac
+@@ -1547,8 +1547,7 @@ dnl			esac
+ 
+ static int fildes[2];
+ 
+-static void *task(p)
+-	void *p;
++static void *task(void *p)
+ {
+ 	int i;
+ 	struct timeval tv;
+@@ -1572,9 +1571,7 @@ static void *task(p)
+ 	exit(0); /* if we exit here, the select blocked the whole process */
+ }
+ 
+-int main(argc, argv)
+-	int argc;
+-	char **argv;
++int main(int argc, char **argv)
+ {
+ 	pthread_t t;
+ 
+--- a/contrib/ldaptcl/tclAppInit.c
++++ b/contrib/ldaptcl/tclAppInit.c
+@@ -45,9 +45,7 @@ EXTERN int		Tcltest_Init _ANSI_ARGS_((Tcl_Interp *interp));
+  */
+ 
+ int
+-main(argc, argv)
+-    int argc;			/* Number of command-line arguments. */
+-    char **argv;		/* Values of command-line arguments. */
++main(int argc, char **argv)
+ {
+ #ifdef USE_TCLX
+     TclX_Main(argc, argv, Tcl_AppInit);
+--- a/contrib/ldaptcl/tkAppInit.c
++++ b/contrib/ldaptcl/tkAppInit.c
+@@ -37,16 +37,9 @@ int (*tclDummyMathPtr)() = matherr;
+  * This is the main program for the application.
+  *-----------------------------------------------------------------------------
+  */
+-#ifdef __cplusplus
+ int
+ main (int    argc,
+       char **argv)
+-#else
+-int
+-main (argc, argv)
+-    int    argc;
+-    char **argv;
+-#endif
+ {
+ #ifdef USE_TCLX
+     TkX_Main(argc, argv, Tcl_AppInit);
+@@ -68,14 +61,8 @@ main (argc, argv)
+  * interp->result if an error occurs.
+  *-----------------------------------------------------------------------------
+  */
+-#ifdef __cplusplus
+ int
+ Tcl_AppInit (Tcl_Interp *interp)
+-#else
+-int
+-Tcl_AppInit (interp)
+-    Tcl_Interp *interp;
+-#endif
+ {
+     if (Tcl_Init (interp) == TCL_ERROR) {
+         return TCL_ERROR;
+--- a/servers/slapd/syslog.c
++++ b/servers/slapd/syslog.c
+@@ -209,7 +209,7 @@ openlog(const char *ident, int logstat, int logfac)
+ }
+ 
+ void
+-closelog()
++closelog(void)
+ {
+ 	(void)close(LogFile);
+ 	LogFile = -1;
diff --git a/net-nds/openldap/openldap-2.6.3-r1.ebuild b/net-nds/openldap/openldap-2.6.3-r1.ebuild
new file mode 100644
index 000000000000..98e863435dae
--- /dev/null
+++ b/net-nds/openldap/openldap-2.6.3-r1.ebuild
@@ -0,0 +1,797 @@
+# Copyright 1999-2022 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+inherit autotools flag-o-matic multilib multilib-minimal preserve-libs ssl-cert toolchain-funcs systemd tmpfiles
+
+MY_PV="$(ver_rs 1-2 _)"
+
+BIS_PN=rfc2307bis.schema
+BIS_PV=20140524
+BIS_P="${BIS_PN}-${BIS_PV}"
+
+DESCRIPTION="LDAP suite of application and development tools"
+HOMEPAGE="https://www.openldap.org/"
+SRC_URI="
+	https://gitlab.com/openldap/${PN}/-/archive/OPENLDAP_REL_ENG_${MY_PV}/${PN}-OPENLDAP_REL_ENG_${MY_PV}.tar.gz
+	mirror://gentoo/${BIS_P}
+"
+S="${WORKDIR}"/${PN}-OPENLDAP_REL_ENG_${MY_PV}
+
+LICENSE="OPENLDAP GPL-2"
+# Subslot added for bug #835654
+SLOT="0/$(ver_cut 1-2)"
+KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~ia64 ~loong ~mips ~ppc ~ppc64 ~riscv ~s390 ~sparc ~x86 ~amd64-linux ~x86-linux ~x86-solaris"
+
+IUSE_DAEMON="argon2 +cleartext crypt experimental minimal samba tcpd"
+IUSE_OVERLAY="overlays perl autoca"
+IUSE_OPTIONAL="debug gnutls iodbc ipv6 odbc sasl ssl selinux static-libs +syslog test"
+IUSE_CONTRIB="kerberos kinit pbkdf2 sha2 smbkrb5passwd"
+IUSE_CONTRIB="${IUSE_CONTRIB} cxx"
+IUSE="systemd ${IUSE_DAEMON} ${IUSE_BACKEND} ${IUSE_OVERLAY} ${IUSE_OPTIONAL} ${IUSE_CONTRIB}"
+RESTRICT="!test? ( test )"
+
+RESTRICT="!test? ( test )"
+REQUIRED_USE="cxx? ( sasl )
+	pbkdf2? ( ssl )
+	test? ( cleartext sasl )
+	autoca? ( !gnutls )
+	?? ( test minimal )"
+
+# openssl is needed to generate lanman-passwords required by samba
+COMMON_DEPEND="
+	kernel_linux? ( sys-apps/util-linux )
+	ssl? (
+		!gnutls? (
+			>=dev-libs/openssl-1.0.1h-r2:0=[${MULTILIB_USEDEP}]
+		)
+		gnutls? (
+			>=net-libs/gnutls-2.12.23-r6:=[${MULTILIB_USEDEP}]
+			>=dev-libs/libgcrypt-1.5.3:0=[${MULTILIB_USEDEP}]
+		)
+	)
+	sasl? ( dev-libs/cyrus-sasl:= )
+	!minimal? (
+		dev-libs/libltdl
+		sys-fs/e2fsprogs
+		>=dev-db/lmdb-0.9.18:=
+		argon2? ( app-crypt/argon2:= )
+		crypt? ( virtual/libcrypt:= )
+		tcpd? ( sys-apps/tcp-wrappers )
+		odbc? ( !iodbc? ( dev-db/unixODBC )
+			iodbc? ( dev-db/libiodbc ) )
+		perl? ( dev-lang/perl:=[-build(-)] )
+		samba? (
+			dev-libs/openssl:0=
+		)
+		smbkrb5passwd? (
+			dev-libs/openssl:0=
+			kerberos? ( app-crypt/heimdal )
+			)
+		kerberos? (
+			virtual/krb5
+			kinit? ( !app-crypt/heimdal )
+		)
+	)
+"
+DEPEND="${COMMON_DEPEND}
+	sys-apps/groff
+"
+RDEPEND="${COMMON_DEPEND}
+	selinux? ( sec-policy/selinux-ldap )
+"
+
+# The user/group are only used for running daemons which are
+# disabled in minimal builds, so elide the accounts too.
+BDEPEND="!minimal? (
+		acct-group/ldap
+		acct-user/ldap
+)
+"
+
+# for tracking versions
+OPENLDAP_VERSIONTAG=".version-tag"
+OPENLDAP_DEFAULTDIR_VERSIONTAG="/var/lib/openldap-data"
+
+MULTILIB_WRAPPED_HEADERS=(
+	# USE=cxx
+	/usr/include/LDAPAsynConnection.h
+	/usr/include/LDAPAttrType.h
+	/usr/include/LDAPAttribute.h
+	/usr/include/LDAPAttributeList.h
+	/usr/include/LDAPConnection.h
+	/usr/include/LDAPConstraints.h
+	/usr/include/LDAPControl.h
+	/usr/include/LDAPControlSet.h
+	/usr/include/LDAPEntry.h
+	/usr/include/LDAPEntryList.h
+	/usr/include/LDAPException.h
+	/usr/include/LDAPExtResult.h
+	/usr/include/LDAPMessage.h
+	/usr/include/LDAPMessageQueue.h
+	/usr/include/LDAPModList.h
+	/usr/include/LDAPModification.h
+	/usr/include/LDAPObjClass.h
+	/usr/include/LDAPRebind.h
+	/usr/include/LDAPRebindAuth.h
+	/usr/include/LDAPReferenceList.h
+	/usr/include/LDAPResult.h
+	/usr/include/LDAPSaslBindResult.h
+	/usr/include/LDAPSchema.h
+	/usr/include/LDAPSearchReference.h
+	/usr/include/LDAPSearchResult.h
+	/usr/include/LDAPSearchResults.h
+	/usr/include/LDAPUrl.h
+	/usr/include/LDAPUrlList.h
+	/usr/include/LdifReader.h
+	/usr/include/LdifWriter.h
+	/usr/include/SaslInteraction.h
+	/usr/include/SaslInteractionHandler.h
+	/usr/include/StringList.h
+	/usr/include/TlsOptions.h
+)
+
+PATCHES=(
+	"${FILESDIR}"/${PN}-2.4.28-fix-dash.patch
+	"${FILESDIR}"/${PN}-2.6.1-system-mdb.patch
+	"${FILESDIR}"/${PN}-2.6.1-cloak.patch
+	"${FILESDIR}"/${PN}-2.6.1-flags.patch
+	"${FILESDIR}"/${PN}-2.6.1-fix-missing-mapping.patch
+	"${FILESDIR}"/${PN}-2.6.1-fix-bashism-configure.patch
+	"${FILESDIR}"/${PN}-2.6.3-clang16.patch
+)
+
+openldap_filecount() {
+	local dir="$1"
+	find "${dir}" -type f ! -name '.*' ! -name 'DB_CONFIG*' | wc -l
+}
+
+openldap_find_versiontags() {
+	# scan for all datadirs
+	local openldap_datadirs=()
+	if [[ -f "${EROOT}"/etc/openldap/slapd.conf ]]; then
+		openldap_datadirs=( $(awk '{if($1 == "directory") print $2 }' "${EROOT}"/etc/openldap/slapd.conf) )
+	fi
+	openldap_datadirs+=( ${OPENLDAP_DEFAULTDIR_VERSIONTAG} )
+
+	einfo
+	einfo "Scanning datadir(s) from slapd.conf and"
+	einfo "the default installdir for Versiontags"
+	einfo "(${OPENLDAP_DEFAULTDIR_VERSIONTAG} may appear twice)"
+	einfo
+
+	# scan datadirs if we have a version tag
+	openldap_found_tag=0
+	have_files=0
+	for each in ${openldap_datadirs[@]} ; do
+		CURRENT_TAGDIR="${ROOT}$(sed "s:\/::" <<< ${each})"
+		CURRENT_TAG="${CURRENT_TAGDIR}/${OPENLDAP_VERSIONTAG}"
+		if [[ -d "${CURRENT_TAGDIR}" ]] && [[ "${openldap_found_tag}" == 0 ]] ; then
+			einfo "- Checking ${each}..."
+			if [[ -r "${CURRENT_TAG}" ]] ; then
+				# yey, we have one :)
+				einfo "   Found Versiontag in ${each}"
+				source "${CURRENT_TAG}"
+				if [[ "${OLDPF}" == "" ]] ; then
+					eerror "Invalid Versiontag found in ${CURRENT_TAGDIR}"
+					eerror "Please delete it"
+					eerror
+					die "Please kill the invalid versiontag in ${CURRENT_TAGDIR}"
+				fi
+
+				OLD_MAJOR=$(ver_cut 2-3 ${OLDPF})
+
+				[[ "$(openldap_filecount ${CURRENT_TAGDIR})" -gt 0 ]] && have_files=1
+
+				# are we on the same branch?
+				if [[ "${OLD_MAJOR}" != "${PV:0:3}" ]] ; then
+					ewarn "   Versiontag doesn't match current major release!"
+					if [[ "${have_files}" == "1" ]] ; then
+						eerror "   Versiontag says other major and you (probably) have datafiles!"
+						echo
+						openldap_upgrade_howto
+					else
+						einfo "   No real problem, seems there's no database."
+					fi
+				else
+					einfo "   Versiontag is fine here :)"
+				fi
+			else
+				einfo "   Non-tagged dir ${each}"
+				[[ "$(openldap_filecount ${each})" -gt 0 ]] && have_files=1
+				if [[ "${have_files}" == "1" ]] ; then
+					einfo "   EEK! Non-empty non-tagged datadir, counting `ls -a ${each} | wc -l` files"
+					echo
+
+					eerror
+					eerror "Your OpenLDAP Installation has a non tagged datadir that"
+					eerror "possibly contains a database at ${CURRENT_TAGDIR}"
+					eerror
+					eerror "Please export data if any entered and empty or remove"
+					eerror "the directory, installation has been stopped so you"
+					eerror "can take required action"
+					eerror
+					eerror "For a HOWTO on exporting the data, see instructions in the ebuild"
+					eerror
+					openldap_upgrade_howto
+					die "Please move the datadir ${CURRENT_TAGDIR} away"
+				fi
+			fi
+			einfo
+		fi
+	done
+	[[ "${have_files}" == "1" ]] && einfo "DB files present" || einfo "No DB files present"
+
+	# Now we must check for the major version of sys-libs/db linked against.
+	# TODO: remove this as we dropped bdb support (gone upstream) in 2.6.1?
+	SLAPD_PATH="${EROOT}/usr/$(get_libdir)/openldap/slapd"
+	if [[ "${have_files}" == "1" ]] && [[ -f "${SLAPD_PATH}" ]]; then
+		OLDVER="$(/usr/bin/ldd ${SLAPD_PATH} \
+			| awk '/libdb-/{gsub("^libdb-","",$1);gsub(".so$","",$1);print $1}')"
+		local fail=0
+		if [[ -z "${OLDVER}" ]] && [[ -z "${NEWVER}" ]]; then
+			:
+			# Nothing wrong here.
+		elif [[ -z "${OLDVER}" ]] && [[ -n "${NEWVER}" ]]; then
+			eerror "	Your existing version of OpenLDAP was not built against"
+			eerror "	any version of sys-libs/db, but the new one will build"
+			eerror "	against	${NEWVER} and your database may be inaccessible."
+			echo
+			fail=1
+		elif [[ -n "${OLDVER}" ]] && [[ -z "${NEWVER}" ]]; then
+			eerror "	Your existing version of OpenLDAP was built against"
+			eerror "	sys-libs/db:${OLDVER}, but the new one will not be"
+			eerror "	built against any version and your database may be"
+			eerror "	inaccessible."
+			echo
+			fail=1
+		elif [[ "${OLDVER}" != "${NEWVER}" ]]; then
+			eerror "	Your existing version of OpenLDAP was built against"
+			eerror "	sys-libs/db:${OLDVER}, but the new one will build against"
+			eerror "	${NEWVER} and your database would be inaccessible."
+			echo
+			fail=1
+		fi
+		[[ "${fail}" == "1" ]] && openldap_upgrade_howto
+	fi
+
+	echo
+	einfo
+	einfo "All datadirs are fine, proceeding with merge now..."
+	einfo
+}
+
+openldap_upgrade_howto() {
+	local d l i
+	eerror
+	eerror "A (possible old) installation of OpenLDAP was detected,"
+	eerror "installation will not proceed for now."
+	eerror
+	eerror "As major version upgrades can corrupt your database,"
+	eerror "you need to dump your database and re-create it afterwards."
+	eerror
+	eerror "Additionally, rebuilding against different major versions of the"
+	eerror "sys-libs/db libraries will cause your database to be inaccessible."
+	eerror ""
+	d="$(date -u +%s)"
+	l="/root/ldapdump.${d}"
+	i="${l}.raw"
+	eerror " 1. /etc/init.d/slapd stop"
+	eerror " 2. slapcat -l ${i}"
+	eerror " 3. grep -E -v '^(entry|context)CSN:' <${i} >${l}"
+	eerror " 4. mv /var/lib/openldap-data/ /var/lib/openldap-data-backup/"
+	eerror " 5. emerge --update \=net-nds/${PF}"
+	eerror " 6. etc-update, and ensure that you apply the changes"
+	eerror " 7. slapadd -l ${l}"
+	eerror " 8. chown ldap:ldap /var/lib/openldap-data/*"
+	eerror " 9. /etc/init.d/slapd start"
+	eerror "10. check that your data is intact."
+	eerror "11. set up the new replication system."
+	eerror
+	if [[ "${FORCE_UPGRADE}" != "1" ]]; then
+		die "You need to upgrade your database first"
+	else
+		eerror "You have the magical FORCE_UPGRADE=1 in place."
+		eerror "Don't say you weren't warned about data loss."
+	fi
+}
+
+pkg_setup() {
+	if ! use sasl && use cxx ; then
+		die "To build the ldapc++ library you must emerge openldap with sasl support"
+	fi
+	# Bug #322787
+	if use minimal && ! has_version "net-nds/openldap" ; then
+		einfo "No datadir scan needed, openldap not installed"
+	elif use minimal && has_version 'net-nds/openldap[minimal]' ; then
+		einfo "Skipping scan for previous datadirs as requested by minimal useflag"
+	else
+		openldap_find_versiontags
+	fi
+}
+
+src_prepare() {
+	rm -r libraries/liblmdb || die 'could not removed bundled lmdb directory'
+
+	for filename in doc/drafts/draft-ietf-ldapext-acl-model-xx.txt; do
+		iconv -f iso-8859-1 -t utf-8 "$filename" > "$filename.utf8"
+		mv "$filename.utf8" "$filename"
+	done
+
+	default
+
+	sed -i \
+		-e "s:\$(localstatedir)/run:${EPREFIX}/run:" \
+		servers/slapd/Makefile.in || die 'adjusting slapd Makefile.in failed'
+
+	pushd build &>/dev/null || die "pushd build"
+	einfo "Making sure upstream build strip does not do stripping too early"
+	sed -i.orig \
+		-e '/^STRIP/s,-s,,g' \
+		top.mk || die "Failed to remove to early stripping"
+	popd &>/dev/null || die
+
+	eautoreconf
+	multilib_copy_sources
+}
+
+build_contrib_module() {
+	# <dir> [<target>]
+	pushd "${S}/contrib/slapd-modules/$1" &>/dev/null || die "pushd contrib/slapd-modules/$1"
+	einfo "Compiling contrib-module: $1"
+	local target="${2:-all}"
+	emake \
+		LDAP_BUILD="${BUILD_DIR}" prefix="${EPREFIX}/usr" \
+		CC="${CC}" libexecdir="${EPREFIX}/usr/$(get_libdir)/openldap" \
+		"$target"
+	popd &>/dev/null || die
+}
+
+multilib_src_configure() {
+	# Optional Features
+	myconf+=(
+		--enable-option-checking
+		$(use_enable debug)
+		--enable-dynamic
+		$(use_enable syslog)
+		$(use_enable ipv6)
+		--enable-local
+	)
+
+	# Optional Packages
+	myconf+=(
+		--without-fetch
+	)
+
+	if ! use minimal && multilib_is_native_abi; then
+		# SLAPD (Standalone LDAP Daemon) Options
+		# overlay chaining requires '--enable-ldap' #296567
+		# see https://www.openldap.org/doc/admin26/overlays.html#Chaining
+		myconf+=(
+			--enable-ldap=yes
+			--enable-slapd
+			$(use_enable cleartext)
+			$(use_enable crypt)
+			$(multilib_native_use_enable sasl spasswd)
+			--disable-slp
+			$(use_enable tcpd wrappers)
+		)
+		if use experimental ; then
+			# connectionless ldap per bug #342439
+			# connectionless is a unsupported feature according to Howard Chu
+			# see https://bugs.openldap.org/show_bug.cgi?id=9739
+			append-cppflags -DLDAP_CONNECTIONLESS
+
+			myconf+=(
+				--enable-dynacl
+				# ACI build as dynamic module not supported (yet)
+				--enable-aci=yes
+			)
+		fi
+
+		for option in modules rlookups slapi; do
+			myconf+=( --enable-${option} )
+		done
+
+		# static SLAPD backends
+		for backend in mdb; do
+			myconf+=( --enable-${backend}=yes )
+		done
+
+		# module SLAPD backends
+		for backend in asyncmeta dnssrv meta null passwd relay sock; do
+			# missing modules: wiredtiger (not available in portage)
+			myconf+=( --enable-${backend}=mod )
+		done
+
+		use perl && myconf+=( --enable-perl=mod )
+
+		if use odbc ; then
+			myconf+=( --enable-sql=mod )
+			if use iodbc ; then
+				myconf+=( --with-odbc="iodbc" )
+				append-cflags -I"${EPREFIX}"/usr/include/iodbc
+			else
+				myconf+=( --with-odbc="unixodbc" )
+			fi
+		fi
+
+		use overlays && myconf+=( --enable-overlays=mod )
+		use autoca && myconf+=( --enable-autoca=mod ) || myconf+=( --enable-autoca=no )
+		# compile-in the syncprov
+		myconf+=( --enable-syncprov=yes )
+
+		# SLAPD Password Module Options
+		myconf+=(
+			$(use_enable argon2)
+		)
+
+		# Optional Packages
+		myconf+=(
+			$(use_with systemd)
+			$(multilib_native_use_with sasl cyrus-sasl)
+		)
+	else
+		myconf+=(
+			--disable-backends
+			--disable-slapd
+			--disable-mdb
+			--disable-overlays
+			--disable-autoca
+			--disable-syslog
+			--without-systemd
+		)
+	fi
+
+	# Library Generation & Linking Options
+	myconf+=(
+		$(use_enable static-libs static)
+		--enable-shared
+		--enable-versioning
+		--with-pic
+	)
+
+	# some cross-compiling tests don't pan out well.
+	tc-is-cross-compiler && myconf+=(
+		--with-yielding-select=yes
+	)
+
+	local ssl_lib="no"
+	if use ssl || ( ! use minimal && use samba ) ; then
+		if use gnutls ; then
+			myconf+=( --with-tls="gnutls" )
+		else
+			# disable MD2 hash function
+			append-cflags -DOPENSSL_NO_MD2
+			myconf+=( --with-tls="openssl" )
+		fi
+	else
+		myconf+=( --with-tls="no" )
+	fi
+
+	tc-export AR CC CXX
+
+	ECONF_SOURCE="${S}" econf \
+		--libexecdir="${EPREFIX}"/usr/$(get_libdir)/openldap \
+		--localstatedir="${EPREFIX}"/var \
+		--runstatedir="${EPREFIX}"/run \
+		--sharedstatedir="${EPREFIX}"/var/lib \
+		"${myconf[@]}"
+
+	# argument '--runstatedir' seems to have no effect therefore this workaround
+	sed -i \
+		-e 's:^runstatedir=.*:runstatedir=${EPREFIX}/run:' \
+		configure contrib/ldapc++/configure contrib/ldaptcl/configure || die 'could not set runstatedir'
+
+	sed -i \
+		-e "s:/var/run/sasl2/mux:${EPREFIX}/run/sasl2/mux:" \
+		doc/guide/admin/security.sdf || die 'could not fix run path in doc'
+
+	emake depend
+}
+
+src_configure_cxx() {
+	# This needs the libraries built by the first build run.
+	# we have to run it AFTER the main build, not just after the main configure
+	local myconf_ldapcpp=(
+		--with-libldap="${E}/lib"
+		--with-ldap-includes="${S}/include"
+	)
+
+	mkdir -p "${BUILD_DIR}"/contrib/ldapc++ || die "could not create ${BUILD_DIR}/contrib/ldapc++ directory"
+	pushd "${BUILD_DIR}/contrib/ldapc++" &>/dev/null || die "pushd contrib/ldapc++"
+	local LDFLAGS=${LDFLAGS}
+	local CPPFLAGS=${CPPFLAGS}
+	append-ldflags -L"${BUILD_DIR}"/libraries/liblber/.libs \
+		-L"${BUILD_DIR}"/libraries/libldap/.libs
+	append-cppflags -I"${BUILD_DIR}"/include
+	ECONF_SOURCE=${S}/contrib/ldapc++ \
+	econf "${myconf_ldapcpp[@]}"
+	popd &>/dev/null || die "popd contrib/ldapc++"
+}
+
+multilib_src_compile() {
+	tc-export AR CC CXX
+	emake CC="$(tc-getCC)" SHELL="${EPREFIX}"/bin/sh
+
+	if ! use minimal && multilib_is_native_abi ; then
+		if use cxx ; then
+			einfo "Building contrib library: ldapc++"
+			src_configure_cxx
+			pushd "${BUILD_DIR}/contrib/ldapc++" &>/dev/null || die "pushd contrib/ldapc++"
+			emake
+			popd &>/dev/null || die
+		fi
+
+		if use smbkrb5passwd ; then
+			einfo "Building contrib-module: smbk5pwd"
+			pushd "${S}/contrib/slapd-modules/smbk5pwd" &>/dev/null || die "pushd contrib/slapd-modules/smbk5pwd"
+
+			MY_DEFS="-DDO_SHADOW"
+			if use samba ; then
+				MY_DEFS="${MY_DEFS} -DDO_SAMBA"
+				MY_KRB5_INC=""
+			fi
+			if use kerberos ; then
+				MY_DEFS="${MY_DEFS} -DDO_KRB5"
+				MY_KRB5_INC="$(krb5-config --cflags)"
+			fi
+
+			emake \
+				DEFS="${MY_DEFS}" \
+				KRB5_INC="${MY_KRB5_INC}" \
+				LDAP_BUILD="${BUILD_DIR}" \
+				libexecdir="${EPREFIX}/usr/$(get_libdir)/openldap"
+			popd &>/dev/null || die
+		fi
+
+		if use overlays ; then
+			einfo "Building contrib-module: samba4"
+			pushd "${S}/contrib/slapd-modules/samba4" &>/dev/null || die "pushd contrib/slapd-modules/samba4"
+
+			emake \
+				LDAP_BUILD="${BUILD_DIR}" \
+				CC="$(tc-getCC)" libexecdir="${EPREFIX}/usr/$(get_libdir)/openldap"
+			popd &>/dev/null || die
+		fi
+
+		if use kerberos ; then
+			if use kinit ; then
+				build_contrib_module "kinit" "kinit.c" "kinit"
+			fi
+			build_contrib_module "passwd" "pw-kerberos.la"
+		fi
+
+		if use pbkdf2; then
+			build_contrib_module "passwd/pbkdf2"
+		fi
+
+		if use sha2 ; then
+			build_contrib_module "passwd/sha2"
+		fi
+
+		# We could build pw-radius if GNURadius would install radlib.h
+		build_contrib_module "passwd" "pw-netscape.la"
+
+		#build_contrib_module "acl" "posixgroup.la" # example code only
+		#build_contrib_module "acl" "gssacl.la" # example code only, also needs kerberos
+		build_contrib_module "addpartial"
+		build_contrib_module "allop"
+		build_contrib_module "allowed"
+		build_contrib_module "autogroup"
+		build_contrib_module "cloak"
+		# build_contrib_module "comp_match" # really complex, adds new external deps, questionable demand
+		build_contrib_module "denyop"
+		build_contrib_module "dsaschema"
+		build_contrib_module "dupent"
+		build_contrib_module "lastbind"
+		# lastmod may not play well with other overlays
+		build_contrib_module "lastmod"
+		build_contrib_module "noopsrch"
+		#build_contrib_module "nops" https://bugs.gentoo.org/641576
+		#build_contrib_module "nssov" RESO:LATER
+		build_contrib_module "trace"
+		# build slapi-plugins
+		pushd "${S}/contrib/slapi-plugins/addrdnvalues" &>/dev/null || die "pushd contrib/slapi-plugins/addrdnvalues"
+		einfo "Building contrib-module: addrdnvalues plugin"
+		$(tc-getCC) -shared \
+			-I"${BUILD_DIR}"/include \
+			-I../../../include \
+			${CFLAGS} \
+			-fPIC \
+			${LDFLAGS} \
+			-o libaddrdnvalues-plugin.so \
+			addrdnvalues.c || die "Building libaddrdnvalues-plugin.so failed"
+		popd &>/dev/null || die
+	fi
+}
+
+multilib_src_test() {
+	if multilib_is_native_abi; then
+		cd "tests"
+		pwd
+		# emake test => runs only lloadd & mdb, in serial; skips ldif,sql,wt,regression
+		# emake partests => runs ALL of the tests in parallel
+		# wt/WiredTiger is not supported in Gentoo
+		TESTS=( plloadd pmdb )
+		#TESTS+=( pldif ) # not done by default, so also exclude here
+		#use odbc && TESTS+=( psql ) # not done by default, so also exclude here
+		emake "${TESTS[@]}"
+	fi
+}
+
+multilib_src_install() {
+	emake CC="$(tc-getCC)" \
+		DESTDIR="${D}" SHELL="${EPREFIX}"/bin/sh install
+
+	if ! use minimal && multilib_is_native_abi; then
+		# openldap modules go here
+		# TODO: write some code to populate slapd.conf with moduleload statements
+		keepdir /usr/$(get_libdir)/openldap/openldap/
+
+		# initial data storage dir
+		keepdir /var/lib/openldap-data
+		use prefix || fowners ldap:ldap /var/lib/openldap-data
+		fperms 0700 /var/lib/openldap-data
+
+		echo "OLDPF='${PF}'" > "${ED}${OPENLDAP_DEFAULTDIR_VERSIONTAG}/${OPENLDAP_VERSIONTAG}"
+		echo "# do NOT delete this. it is used"	>> "${ED}${OPENLDAP_DEFAULTDIR_VERSIONTAG}/${OPENLDAP_VERSIONTAG}"
+		echo "# to track versions for upgrading." >> "${ED}${OPENLDAP_DEFAULTDIR_VERSIONTAG}/${OPENLDAP_VERSIONTAG}"
+
+		# use our config
+		rm "${ED}"/etc/openldap/slapd.conf
+		insinto /etc/openldap
+		newins "${FILESDIR}"/${PN}-2.4.40-slapd-conf slapd.conf
+		configfile="${ED}"/etc/openldap/slapd.conf
+
+		# populate with built backends
+		einfo "populate config with built backends"
+		for x in "${ED}"/usr/$(get_libdir)/openldap/openldap/back_*.so; do
+			einfo "Adding $(basename ${x})"
+			sed -e "/###INSERTDYNAMICMODULESHERE###$/a# moduleload\t$(basename ${x})" -i "${configfile}" || die
+		done
+		sed -e "s:###INSERTDYNAMICMODULESHERE###$:# modulepath\t${EPREFIX}/usr/$(get_libdir)/openldap/openldap:" -i "${configfile}"
+		use prefix || fowners root:ldap /etc/openldap/slapd.conf
+		fperms 0640 /etc/openldap/slapd.conf
+		cp "${configfile}" "${configfile}".default || die
+
+		# install our own init scripts and systemd unit files
+		einfo "Install init scripts"
+		sed -e "s,/usr/lib/,/usr/$(get_libdir)/," "${FILESDIR}"/slapd-initd-2.4.40-r2 > "${T}"/slapd || die
+		doinitd "${T}"/slapd
+		newconfd "${FILESDIR}"/slapd-confd-2.6.1 slapd
+
+		einfo "Install systemd service"
+		sed -e "s,/usr/lib/,/usr/$(get_libdir)/," "${FILESDIR}"/slapd-2.6.1.service > "${T}"/slapd.service || die
+		systemd_dounit "${T}"/slapd.service
+		systemd_install_serviced "${FILESDIR}"/slapd.service.conf
+		newtmpfiles "${FILESDIR}"/slapd.tmpfilesd slapd.conf
+
+		# if built without SLP, we don't need to be before avahi
+			sed -i \
+				-e '/before/{s/avahi-daemon//g}' \
+				"${ED}"/etc/init.d/slapd \
+				|| die
+
+		if use cxx ; then
+			einfo "Install the ldapc++ library"
+			cd "${BUILD_DIR}/contrib/ldapc++" || die
+			emake DESTDIR="${D}" libexecdir="${EPREFIX}/usr/$(get_libdir)/openldap" install
+			cd "${S}"/contrib/ldapc++ || die
+			newdoc README ldapc++-README
+		fi
+
+		if use smbkrb5passwd ; then
+			einfo "Install the smbk5pwd module"
+			cd "${S}/contrib/slapd-modules/smbk5pwd" || die
+			emake DESTDIR="${D}" \
+				LDAP_BUILD="${BUILD_DIR}" \
+				libexecdir="${EPREFIX}/usr/$(get_libdir)/openldap" install
+			newdoc README smbk5pwd-README
+		fi
+
+		if use overlays ; then
+			einfo "Install the samba4 module"
+			cd "${S}/contrib/slapd-modules/samba4" || die
+			emake DESTDIR="${D}" \
+				LDAP_BUILD="${BUILD_DIR}" \
+				libexecdir="${EPREFIX}/usr/$(get_libdir)/openldap" install
+			newdoc README samba4-README
+		fi
+
+		einfo "Installing contrib modules"
+		cd "${S}/contrib/slapd-modules" || die
+		for l in */*.la */*/*.la; do
+			[[ -e ${l} ]] || continue
+			libtool --mode=install cp ${l} \
+				"${ED}"/usr/$(get_libdir)/openldap/openldap || \
+				die "installing ${l} failed"
+		done
+
+		dodoc "${FILESDIR}"/DB_CONFIG.fast.example
+		docinto contrib
+		doman */*.5
+		#newdoc acl/README*
+		newdoc addpartial/README addpartial-README
+		newdoc allop/README allop-README
+		newdoc allowed/README allowed-README
+		newdoc autogroup/README autogroup-README
+		newdoc dsaschema/README dsaschema-README
+		newdoc passwd/README passwd-README
+		cd "${S}/contrib/slapi-plugins" || die
+		insinto /usr/$(get_libdir)/openldap/openldap
+		doins */*.so
+		docinto contrib
+		newdoc addrdnvalues/README addrdnvalues-README
+
+		insinto /etc/openldap/schema
+		newins "${DISTDIR}"/${BIS_P} ${BIS_PN}
+
+		docinto back-sock ; dodoc "${S}"/servers/slapd/back-sock/searchexample*
+		docinto back-perl ; dodoc "${S}"/servers/slapd/back-perl/SampleLDAP.pm
+
+		dosbin "${S}"/contrib/slapd-tools/statslog
+		newdoc "${S}"/contrib/slapd-tools/README README.statslog
+	fi
+
+	if ! use static-libs ; then
+		find "${ED}" \( -name '*.a' -o -name '*.la' \) -delete || die
+	fi
+}
+
+multilib_src_install_all() {
+	dodoc ANNOUNCEMENT CHANGES COPYRIGHT README
+	docinto rfc ; dodoc doc/rfc/*.txt
+}
+
+pkg_preinst() {
+	# keep old libs if any
+	preserve_old_lib /usr/$(get_libdir)/{liblber,libldap,libldap_r}-2.4$(get_libname 0)
+	# bug 440470, only display the getting started help there was no openldap before,
+	# or we are going to a non-minimal build
+	! has_version net-nds/openldap || has_version 'net-nds/openldap[minimal]'
+	OPENLDAP_PRINT_MESSAGES=$((! $?))
+}
+
+pkg_postinst() {
+	if ! use minimal ; then
+		tmpfiles_process slapd.conf
+
+		# You cannot build SSL certificates during src_install that will make
+		# binary packages containing your SSL key, which is both a security risk
+		# and a misconfiguration if multiple machines use the same key and cert.
+		if use ssl; then
+			install_cert /etc/openldap/ssl/ldap
+			use prefix || chown ldap:ldap "${EROOT}"/etc/openldap/ssl/ldap.*
+			ewarn "Self-signed SSL certificates are treated harshly by OpenLDAP 2.[12]"
+			ewarn "Self-signed SSL certificates are treated harshly by OpenLDAP 2.[12]"
+			ewarn "add 'TLS_REQCERT allow' if you want to use them."
+		fi
+
+		if use prefix; then
+			# Warn about prefix issues with slapd
+			eerror "slapd might NOT be usable on Prefix systems as it requires root privileges"
+			eerror "to start up, and requires that certain files directories be owned by"
+			eerror "ldap:ldap.  As Prefix does not support changing ownership of files and"
+			eerror "directories, you will have to manually fix this yourself."
+		fi
+
+		# These lines force the permissions of various content to be correct
+		if [[ -d "${EROOT}"/var/run/openldap ]]; then
+			use prefix || { chown ldap:ldap "${EROOT}"/var/run/openldap || die; }
+			chmod 0755 "${EROOT}"/var/run/openldap || die
+		fi
+		use prefix || chown root:ldap "${EROOT}"/etc/openldap/slapd.conf{,.default}
+		chmod 0640 "${EROOT}"/etc/openldap/slapd.conf{,.default} || die
+		use prefix || chown ldap:ldap "${EROOT}"/var/lib/openldap-data
+	fi
+
+	if has_version 'net-nds/openldap[-minimal]' && ((${OPENLDAP_PRINT_MESSAGES})); then
+		elog "Getting started using OpenLDAP? There is some documentation available:"
+		elog "Gentoo Guide to OpenLDAP Authentication"
+		elog "(https://wiki.gentoo.org/wiki/Centralized_authentication_using_OpenLDAP)"
+	fi
+
+	preserve_old_lib_notify /usr/$(get_libdir)/{liblber,libldap,libldap_r}-2.4$(get_libname 0)
+}