Index: head/databases/lmdb/Makefile
===================================================================
--- head/databases/lmdb/Makefile	(revision 478268)
+++ head/databases/lmdb/Makefile	(revision 478269)
@@ -1,35 +1,36 @@
 # Created by: Xin Li <delphij@FreeBSD.org>
 # $FreeBSD$
 
 PORTNAME=	lmdb
 PORTVERSION=	0.9.22
 DISTVERSIONPREFIX=	${PORTNAME:tu}_
+PORTREVISION=	1
 PORTEPOCH=	1
 CATEGORIES=	databases
 
 MAINTAINER=	delphij@FreeBSD.org
 COMMENT=	OpenLDAP Lightning Memory-Mapped Database
 
 LICENSE=	OPENLDAP
 LICENSE_NAME=	OpenLDAP Public License
 LICENSE_FILE=	${WRKSRC}/LICENSE
 LICENSE_PERMS=	dist-mirror dist-sell pkg-mirror pkg-sell auto-accept
 
 WRKSRC_SUBDIR=		libraries/liblmdb
 MAKE_ARGS+=	CC="${CC}"
 MAKE_ARGS+=	prefix="${PREFIX}" INSTALL_PROGRAM="${INSTALL_PROGRAM}"
 MAKE_ARGS+=	INSTALL_LIB="${INSTALL_LIB}" INSTALL_DATA="${INSTALL_DATA}" INSTALL_MAN="${INSTALL_MAN}"
 
 USE_LDCONFIG=	yes
 
 USE_GITHUB=	yes
 GH_ACCOUNT=	${PORTNAME:tu}
 
 post-install:
 	${LN} -sf liblmdb.so.0 ${STAGEDIR}${PREFIX}/lib/liblmdb.so
 
 do-test:
 	${MKDIR} ${WRKSRC}/testdb
 	cd ${WRKSRC} && ./mtest*
 
 .include <bsd.port.mk>
Index: head/databases/lmdb/files/patch-mdb.c
===================================================================
--- head/databases/lmdb/files/patch-mdb.c	(revision 478268)
+++ head/databases/lmdb/files/patch-mdb.c	(revision 478269)
@@ -1,11 +1,23 @@
---- mdb.c.orig	2017-06-01 16:51:10 UTC
+- NetBSD has fdatasync(2), see https://github.com/NetBSD/src/commit/e963c41c6fb9
+- OpenBSD has fdatasync(3), see https://github.com/openbsd/src/commit/aa96fc3dc04f
+- FreeBSD 11.0 has robust mutexes (see base r300043) and 11.1 has fdatasync(2) (see base r304977)
+
+--- mdb.c.orig	2018-03-22 15:23:05 UTC
 +++ mdb.c
-@@ -125,6 +125,8 @@ typedef SSIZE_T	ssize_t;
+@@ -124,11 +124,12 @@ typedef SSIZE_T	ssize_t;
+ #include <resolv.h>	/* defines BYTE_ORDER on HPUX and Solaris */
+ #endif
+ 
+-#if defined(__APPLE__) || defined (BSD) || defined(__FreeBSD_kernel__)
+-# define MDB_USE_POSIX_SEM	1
++#if defined(__APPLE__) || defined(ANDROID) || defined(__DragonFly__) || (defined(__FreeBSD__) && __FreeBSD__ < 11)
  # define MDB_FDATASYNC		fsync
- #elif defined(ANDROID)
- # define MDB_FDATASYNC		fsync
-+#elif defined(__FreeBSD_version) && __FreeBSD_version < 1101000
-+# define MDB_FDATASYNC		fsync
+-#elif defined(ANDROID)
+-# define MDB_FDATASYNC		fsync
++#endif
++
++#if defined(__APPLE__) || defined(__DragonFly__) || defined(__NetBSD__) || defined(__OpenBSD__) || (defined(__FreeBSD__) && __FreeBSD__ < 11)
++# define MDB_USE_POSIX_SEM	1
  #endif
  
  #ifndef _WIN32