diff --git a/CMakeLists.txt b/CMakeLists.txt
index 6cd5c7b3f..8555f7347 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1632,6 +1632,7 @@ ENDIF(USE_PNETCDF)
 
 IF(USE_HDF5)
   add_subdirectory(libsrc4)
+  add_subdirectory(libhdf5)
 ENDIF(USE_HDF5)
 
 IF(USE_HDF4)
diff --git a/Makefile.am b/Makefile.am
index 4fe5be7f9..ed55a212e 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -7,9 +7,6 @@
 
 # Ed Hartnett, Ward Fisher
 
-
-
-
 # This directory stores libtool macros, put there by aclocal.
 ACLOCAL_AMFLAGS = -I m4
 
@@ -45,6 +42,7 @@ endif
 if USE_NETCDF4
 H5_TEST_DIR = h5_test
 LIBSRC4_DIR = libsrc4
+LIBHDF5 = libhdf5
 NC_TEST4 = nc_test4
 endif
 
@@ -86,8 +84,9 @@ endif
 # and run. ncgen must come before ncdump, because their tests
 # depend on it.
 SUBDIRS = include $(H5_TEST_DIR) libdispatch libsrc $(LIBSRC4_DIR)	\
-$(LIBSRCP) $(LIBHDF4) $(OCLIB) $(DAP2) ${DAP4} liblib $(NCGEN3)		\
-$(NCGEN) $(NCDUMP) ${PLUGIN_DIR} $(TESTDIRS) docs $(EXAMPLES)
+$(LIBSRCP) $(LIBHDF4) $(LIBHDF5) $(OCLIB) $(DAP2) ${DAP4} liblib	\
+$(NCGEN3) $(NCGEN) $(NCDUMP) ${PLUGIN_DIR} $(TESTDIRS) docs		\
+$(EXAMPLES)
 
 # Remove these generated files, for a distclean.
 DISTCLEANFILES = VERSION comps.txt test_prog libnetcdf.settings	\
diff --git a/configure.ac b/configure.ac
index 9f7e9d509..b1192f35f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -180,6 +180,7 @@ AC_MSG_CHECKING([whether we should build netCDF-4])
 AC_ARG_ENABLE([netcdf-4], [AS_HELP_STRING([--disable-netcdf-4],
               [do not build with netcdf-4 (else HDF5 and zlib required)])])
 test "x$enable_netcdf_4" = xno || enable_netcdf_4=yes
+enable_hdf5=enable_netcdf_4
 
 # Synonym
 AC_ARG_ENABLE([netcdf4], [AS_HELP_STRING([--disable-netcdf4],
@@ -909,6 +910,7 @@ AC_CHECK_LIB([m], [floor], [],
 
 if test "x$enable_netcdf_4" = xyes; then
 
+   AC_DEFINE([USE_HDF5], [1], [if true, use HDF5])
    AC_DEFINE([USE_NETCDF4], [1], [if true, build netCDF-4])
    AC_DEFINE([H5_USE_16_API], [1], [use HDF5 1.6 API])
 
@@ -1202,6 +1204,7 @@ AM_CONDITIONAL(USE_PNETCDF_DIR, [test ! "x$PNETCDFDIR" = x])
 AM_CONDITIONAL(USE_LOGGING, [test "x$enable_logging" = xyes])
 AM_CONDITIONAL(CROSS_COMPILING, [test "x$cross_compiling" = xyes])
 AM_CONDITIONAL(USE_NETCDF4, [test x$enable_netcdf_4 = xyes])
+AM_CONDITIONAL(USE_HDF5, [test x$enable_hdf5 = xyes])
 AM_CONDITIONAL(USE_HDF4, [test x$enable_hdf4 = xyes])
 AM_CONDITIONAL(USE_HDF4_FILE_TESTS, [test x$enable_hdf4_file_tests = xyes])
 AM_CONDITIONAL(USE_RENAMEV3, [test x$enable_netcdf_4 = xyes -o x$enable_dap = xyes])
@@ -1335,6 +1338,7 @@ AC_SUBST(HAS_NC2,[$nc_build_v2])
 AC_SUBST(HAS_NC4,[$enable_netcdf_4])
 AC_SUBST(HAS_CDF5,[$enable_cdf5])
 AC_SUBST(HAS_HDF4,[$enable_hdf4])
+AC_SUBST(HAS_HDF5,[$enable_hdf5])
 AC_SUBST(HAS_PNETCDF,[$enable_pnetcdf])
 AC_SUBST(HAS_HDF5,[$enable_netcdf_4])
 AC_SUBST(HAS_LOGGING, [$enable_logging])
@@ -1440,14 +1444,15 @@ AC_MSG_NOTICE([generating header files and makefiles])
 AC_CONFIG_FILES([Makefile
                  nc-config
                  netcdf.pc
-	             libnetcdf.settings
-		         postinstall.sh
-		         include/netcdf_meta.h
+                 libnetcdf.settings
+		 postinstall.sh
+		 include/netcdf_meta.h
                  include/Makefile
                  h5_test/Makefile
                  hdf4_test/Makefile
                  libsrc/Makefile
                  libsrc4/Makefile
+                 libhdf5/Makefile
                  libsrcp/Makefile
                  ncdump/Makefile
                  ncgen3/Makefile
diff --git a/libhdf5/CMakeLists.txt b/libhdf5/CMakeLists.txt
new file mode 100644
index 000000000..9a0e86d15
--- /dev/null
+++ b/libhdf5/CMakeLists.txt
@@ -0,0 +1,18 @@
+## This is a CMake file, part of Unidata's netCDF package.
+# Copyright 2018, see the COPYRIGHT file for more information.
+#
+# This builds the HDF5 dispatch layer.
+#
+# Ed Hartnett
+
+# The source files for the HDF5 dispatch layer.
+SET(libnchdf5_SOURCES nc4hdf.c nc4info.c hdf5file.c)
+# SET(libnchdf5_SOURCES hdf5file.c nc4hdf.c hdf5attr.c hdf5dispatch.c
+#   hdf5var.c hdf5type.c hdf5internal.c hdf5dim.c hdf5grp.c nc4info.c)
+
+# Build the HDF4 dispatch layer as a library that will be included in
+# the netCDF library.
+add_library(netcdfhdf5 OBJECT ${libnchdf5_SOURCES})
+
+# Remember to package this file for CMake builds.
+ADD_EXTRA_DIST(${libnchdf5_SOURCES} CMakeLists.txt)
diff --git a/libhdf5/Makefile.am b/libhdf5/Makefile.am
new file mode 100644
index 000000000..258fbeb56
--- /dev/null
+++ b/libhdf5/Makefile.am
@@ -0,0 +1,27 @@
+# This is part of Unidata's netCDF package. Copyright 2018, see the
+# COPYRIGHT file for more information.
+
+# Build the HDF5 dispatch layer.
+
+# Ed Hartnett
+
+# Get AM_CPPFLAGS.
+include $(top_srcdir)/lib_flags.am
+libnetcdf4_la_CPPFLAGS = ${AM_CPPFLAGS}
+
+# This is our output. The HDF5 convenience library.
+noinst_LTLIBRARIES = libnchdf5.la
+
+# The source files.
+libnchdf5_la_SOURCES = nc4hdf.c nc4info.c hdf5file.c
+# libnchdf5_la_SOURCES = nc4hdf.c nc4info.c hdf5file.c hdf5attr.c	\
+# hdf5dispatch.c hdf5var.c hdf5type.c hdf5internal.c hdf5dim.c	\
+# hdf5grp.c
+
+# Package this for cmake build.
+EXTRA_DIST = CMakeLists.txt
+
+
+
+
+
diff --git a/libsrc4/nc4file.c b/libhdf5/hdf5file.c
similarity index 100%
rename from libsrc4/nc4file.c
rename to libhdf5/hdf5file.c
diff --git a/libsrc4/nc4hdf.c b/libhdf5/nc4hdf.c
similarity index 100%
rename from libsrc4/nc4hdf.c
rename to libhdf5/nc4hdf.c
diff --git a/libsrc4/nc4info.c b/libhdf5/nc4info.c
similarity index 100%
rename from libsrc4/nc4info.c
rename to libhdf5/nc4info.c
diff --git a/liblib/CMakeLists.txt b/liblib/CMakeLists.txt
index 1afc85486..b8c5f1dbc 100644
--- a/liblib/CMakeLists.txt
+++ b/liblib/CMakeLists.txt
@@ -7,6 +7,8 @@ SET(liblib_LIBS dispatch netcdf3)
 
 IF(USE_HDF5 OR USE_NETCDF4)
   SET(liblib_LIBS ${liblib_LIBS} netcdf4)
+  SET(liblib_LIBS ${liblib_LIBS} netcdfhdf5)
+  
 ENDIF()
 
 IF(USE_PNETCDF)
diff --git a/liblib/Makefile.am b/liblib/Makefile.am
index fd8c00af3..0aeaf90c5 100644
--- a/liblib/Makefile.am
+++ b/liblib/Makefile.am
@@ -40,11 +40,17 @@ AM_CPPFLAGS += -I${top_srcdir}/libsrcp
 libnetcdf_la_LIBADD += ${top_builddir}/libsrcp/libnetcdfp.la
 endif # USE_PNETCDF
 
+# + hdf5
+if USE_NETCDF4
+AM_CPPFLAGS += -I${top_srcdir}/libhdf5
+libnetcdf_la_LIBADD += ${top_builddir}/libhdf5/libnchdf5.la
+endif # USE_NETCDF4
+
 # + hdf4
 if USE_HDF4
 AM_CPPFLAGS += -I${top_srcdir}/libhdf4
 libnetcdf_la_LIBADD += ${top_builddir}/libhdf4/libnchdf4.la
-endif # USE_PNETCDF
+endif # USE_HDF4
 
 # + dap
 if ENABLE_DAP
diff --git a/libsrc4/CMakeLists.txt b/libsrc4/CMakeLists.txt
index 0aa4b69d2..a6dd5d63f 100644
--- a/libsrc4/CMakeLists.txt
+++ b/libsrc4/CMakeLists.txt
@@ -1,6 +1,6 @@
 # Process these files with m4.
 
-SET(libsrc4_SOURCES nc4dispatch.c nc4attr.c nc4dim.c nc4file.c nc4grp.c nc4type.c nc4var.c ncfunc.c nc4internal.c nc4hdf.c nc4info.c ncindex.c nc4mem.c nc4memcb.c )
+SET(libsrc4_SOURCES nc4dispatch.c nc4attr.c nc4dim.c nc4grp.c nc4type.c nc4var.c ncfunc.c nc4internal.c ncindex.c nc4mem.c nc4memcb.c )
 
 IF(LOGGING)
   SET(libsrc4_SOURCES ${libsrc4_SOURCES} error4.c)
diff --git a/libsrc4/Makefile.am b/libsrc4/Makefile.am
index 8e3218f81..f60b30dc3 100644
--- a/libsrc4/Makefile.am
+++ b/libsrc4/Makefile.am
@@ -10,9 +10,9 @@ libnetcdf4_la_CPPFLAGS = ${AM_CPPFLAGS}
 
 # This is our output. The netCDF-4 convenience library.
 noinst_LTLIBRARIES = libnetcdf4.la
-libnetcdf4_la_SOURCES = nc4dispatch.c nc4attr.c nc4dim.c nc4file.c	\
-nc4grp.c nc4hdf.c nc4internal.c nc4type.c nc4var.c ncfunc.c error4.c	\
-nc4info.c nc4printer.c ncindex.c nc4mem.c nc4memcb.c
+libnetcdf4_la_SOURCES = nc4dispatch.c nc4attr.c nc4dim.c nc4grp.c	\
+nc4internal.c nc4type.c nc4var.c ncfunc.c error4.c nc4printer.c		\
+ncindex.c nc4mem.c nc4memcb.c
 
 EXTRA_DIST = CMakeLists.txt