diff --git a/.travis.yml b/.travis.yml
index ef3fc4b94..663cec101 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -8,6 +8,7 @@ before_install:
   - test -n $CC && unset CC
   - sudo apt-get -qq update
   - sudo apt-get install --yes -qq build-essential autoconf libtool cmake
+  - sudo apt-get install --yes -qq gfortran
   - sudo apt-get install --yes -qq libopenmpi-dev openmpi-bin
   - sudo apt-get install --yes -qq libhdf5-openmpi-dev
   - (cd $HOME/spack; git describe) || git clone https://github.com/spack/spack $HOME/spack
diff --git a/client/src/Makefile.am b/client/src/Makefile.am
index ef720c7cf..85b4f8a33 100644
--- a/client/src/Makefile.am
+++ b/client/src/Makefile.am
@@ -1,11 +1,11 @@
-lib_LTLIBRARIES = libunifycr.la libunifycr_gotcha.la
+lib_LTLIBRARIES = libunifycr.la libunifycr_gotcha.la libunifycrf.la
 
 libunifycrdir = $(includedir)
 libunifycr_gotchadir = $(includedir)
 
 AM_CFLAGS = -Wall -Wno-strict-aliasing
 
-include_HEADERS = unifycr.h
+include_HEADERS = unifycr.h unifycrf.h
 
 CLIENT_COMMON_CPPFLAGS = \
   -I$(top_builddir)/client \
@@ -68,3 +68,7 @@ libunifycr_gotcha_la_CFLAGS   = $(CLIENT_COMMON_CFLAGS) $(GOTCHA_CFLAGS)
 libunifycr_gotcha_la_LDFLAGS  = $(CLIENT_COMMON_LDFLAGS) $(GOTCHA_LDFLAGS)
 libunifycr_gotcha_la_LIBADD   = $(CLIENT_COMMON_LIBADD) -lgotcha
 
+libunifycrf_la_SOURCES  = unifycrf.c
+libunifycrf_la_CPPFLAGS = $(CLIENT_COMMON_CPPFLAGS)
+libunifycrf_la_CFLAGS   = $(AM_CFLAGS) $(CLIENT_COMMON_CFLAGS)
+libunifycrf_la_LIBADD   = libunifycr_gotcha.la
diff --git a/client/src/unifycrf.c b/client/src/unifycrf.c
new file mode 100644
index 000000000..a98d2db8a
--- /dev/null
+++ b/client/src/unifycrf.c
@@ -0,0 +1,162 @@
+/*
+ * Copyright (c) 2017, Lawrence Livermore National Security, LLC.
+ * Produced at the Lawrence Livermore National Laboratory.
+ *
+ * Copyright 2017-2019, UT-Battelle, LLC.
+ *
+ * LLNL-CODE-741539
+ * All rights reserved.
+ *
+ * This is the license for UnifyCR.
+ * For details, see https://github.com/LLNL/UnifyCR.
+ * Please read https://github.com/LLNL/UnifyCR/LICENSE for full license text.
+ */
+
+/* This file compiles a normalized interface for Fortran in which:
+ *   - Fortran link names are in lower case
+ *   - Fortran link names have a single trailing underscore
+ *   - boolean true is expected to be 1
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "unifycr.h"
+
+/* TODO: enable UNIFYCR_Fint to be configured to be different type */
+typedef int UNIFYCR_Fint;
+
+#ifdef USE_FORT_STDCALL
+# define FORT_CALL __stdcall
+#elif defined (USE_FORT_CDECL)
+# define FORT_CALL __cdecl
+#else
+# define FORT_CALL
+#endif
+
+#ifdef USE_FORT_MIXED_STR_LEN
+# define FORT_MIXED_LEN_DECL   , UNIFYCR_Fint
+# define FORT_END_LEN_DECL
+# define FORT_MIXED_LEN(a)     , UNIFYCR_Fint a
+# define FORT_END_LEN(a)
+#else
+# define FORT_MIXED_LEN_DECL
+# define FORT_END_LEN_DECL     , UNIFYCR_Fint
+# define FORT_MIXED_LEN(a)
+# define FORT_END_LEN(a)       , UNIFYCR_Fint a
+#endif
+
+#ifdef HAVE_FORTRAN_API
+# ifdef FORTRAN_EXPORTS
+#  define FORTRAN_API __declspec(dllexport)
+# else
+#  define FORTRAN_API __declspec(dllimport)
+# endif
+#else
+# define FORTRAN_API
+#endif
+
+/* convert a Fortran string to a C string, by removing any trailing
+ * spaces and terminating with a NULL */
+static int unifycr_fstr2cstr(const char* fstr, int flen, char* cstr, int clen)
+{
+    int rc = 0;
+
+    /* check that our pointers aren't NULL */
+    if ((fstr == NULL) || (cstr == NULL)) {
+        return 1;
+    }
+
+    /* determine length of Fortran string after removing trailing spaces */
+    while ((flen > 0) && (fstr[flen-1] == ' ')) {
+        flen--;
+    }
+  
+    /* assume we can copy the whole string */
+    int len = flen;
+    if (flen > (clen - 1)) {
+        /* Fortran string is longer than C buffer, trucnated copy */
+        len = clen - 1;
+        rc = 1;
+    }
+
+    /* copy the Fortran string to the C string */
+    if (len > 0) {
+        strncpy(cstr, fstr, len);
+    }
+
+    /* null-terminate the C string */
+    if (len >= 0) {
+        cstr[len] = '\0';
+    }
+
+    return rc;
+}
+
+/* convert a C string to a Fortran string, adding trailing spaces
+ * as necessary */
+static int unifycr_cstr2fstr(const char* cstr, char* fstr, int flen)
+{
+    int rc = 0;
+
+    /* check that our pointers aren't NULL */
+    if ((cstr == NULL) || (fstr == NULL)) {
+        return 1;
+    }
+
+    /* determine length of C string */
+    int clen = strlen(cstr);
+
+    /* copy the characters from the Fortran string to the C string */
+    if (clen <= flen) {
+        /* C string will fit within our Fortran buffer, copy it over */
+        if (clen > 0) {
+            strncpy(fstr, cstr, clen);
+        }
+
+        /* fill in trailing spaces */
+        while (clen < flen) {
+            fstr[clen] = ' ';
+            clen++;
+        }
+    } else {
+        /* C string is longer than Fortran buffer, truncated copy */
+        strncpy(fstr, cstr, flen);
+        rc = 1;
+    }
+
+    return rc;
+}
+
+/*================================================
+ * Mount, Unmount
+ *================================================*/
+
+FORTRAN_API
+void FORT_CALL unifycr_mount_(char* prefix FORT_MIXED_LEN(prefix_len),
+                              int* rank, int* size, int* app_id,
+                              int* ierror FORT_END_LEN(prefix_len))
+{
+    /* convert name from a Fortran string to C string */
+    char prefix_tmp[1024];
+    int rc = unifycr_fstr2cstr(prefix, prefix_len,
+                               prefix_tmp, sizeof(prefix_tmp));
+    if (rc != 0) {
+        *ierror = 1; // !UNIFYCR_SUCCESS
+        return;
+    }
+
+    int rank_tmp = *rank;
+    int size_tmp = *size;
+    int app_id_tmp = *app_id;
+    *ierror = unifycr_mount(prefix_tmp, rank_tmp, size_tmp, app_id_tmp);
+    return;
+}
+
+FORTRAN_API
+void FORT_CALL unifycr_unmount_(int* ierror)
+{
+    *ierror = unifycr_unmount();
+    return;
+}
diff --git a/client/src/unifycrf.h b/client/src/unifycrf.h
new file mode 100644
index 000000000..e090e6116
--- /dev/null
+++ b/client/src/unifycrf.h
@@ -0,0 +1,15 @@
+! Copyright (c) 2017, Lawrence Livermore National Security, LLC.
+! Produced at the Lawrence Livermore National Laboratory.
+!
+! Copyright 2017-2019, UT-Battelle, LLC.
+!
+! LLNL-CODE-741539
+! All rights reserved.
+!
+! This is the license for UnifyCR.
+! For details, see https://github.com/LLNL/UnifyCR.
+! Please read https://github.com/LLNL/UnifyCR/LICENSE for full license text.
+!
+! return codes
+      INTEGER UNIFYCR_SUCCESS
+      PARAMETER (UNIFYCR_SUCCESS=0)
diff --git a/common/src/Makefile.am b/common/src/Makefile.am
index 5012aa8b4..5cb797370 100644
--- a/common/src/Makefile.am
+++ b/common/src/Makefile.am
@@ -1,5 +1,7 @@
 lib_LTLIBRARIES = libunifycr_common.la
 
+include_HEADERS = unifycr_const.h err_enumerator.h
+
 libunifycr_commondir = $(includedir)
 
 BASE_SRCS = \
diff --git a/configure.ac b/configure.ac
index babbf48db..6d2426761 100755
--- a/configure.ac
+++ b/configure.ac
@@ -25,6 +25,11 @@ AC_PROG_MAKE_SET
 AC_PROG_RANLIB
 AC_PROG_LIBTOOL
 
+# fortran support
+AC_PROG_FC
+AC_FC_LIBRARY_LDFLAGS
+AC_FC_DUMMY_MAIN
+
 # Checks for typedefs, structures, and compiler characteristics.
 AC_TYPE_MODE_T
 AC_TYPE_OFF_T
@@ -152,6 +157,9 @@ AC_CHECK_HEADERS(mntent.h sys/mount.h)
 
 # look for MPI and set flags
 LX_FIND_MPI
+AC_LANG_PUSH([Fortran])
+LX_FIND_MPI
+AC_LANG_POP
 
 # look for leveldb library, sets LEVELDB_CFLAGS/LDFLAGS/LIBS
 UNIFYCR_AC_LEVELDB
diff --git a/examples/src/Makefile.am b/examples/src/Makefile.am
index e1ad69b60..e02ec79da 100644
--- a/examples/src/Makefile.am
+++ b/examples/src/Makefile.am
@@ -2,7 +2,7 @@ libexec_PROGRAMS = \
   cr-posix cr-gotcha cr-static \
   read-posix read-gotcha read-static \
   write-posix write-gotcha write-static \
-  writeread-posix writeread-gotcha writeread-static \
+  writeread-posix writeread-gotcha writeread-static writeread-ftn \
   sysio-write-gotcha sysio-write-static \
   sysio-read-gotcha sysio-read-static \
   sysio-writeread-gotcha sysio-writeread-static sysio-writeread-posix \
@@ -32,8 +32,15 @@ noinst_HEADERS = \
 test_cppflags = $(AM_CPPFLAGS) $(MPI_CFLAGS) \
    -I$(top_srcdir)/client/src -I$(top_srcdir)/common/src
 
+test_ftn_flags   = $(AM_FCFLAGS) $(MPI_FFLAGS) \
+   -I$(top_srcdir)/client/src -I$(top_srcdir)/common/src
+test_ftn_ldadd   = $(top_builddir)/client/src/libunifycrf.la -lrt -lm $(FCLIBS)
+test_ftn_ldflags = $(AM_LDFLAGS) $(MPI_FLDFLAGS) \
+    $(FLATCC_LDFLAGS) $(FLATCC_LIBS)
+
 test_gotcha_ldadd   = $(top_builddir)/client/src/libunifycr_gotcha.la -lrt -lm
-test_gotcha_ldflags = $(AM_LDFLAGS) $(MPI_CLDFLAGS) $(FLATCC_LDFLAGS) $(FLATCC_LIBS)
+test_gotcha_ldflags = $(AM_LDFLAGS) $(MPI_CLDFLAGS) \
+    $(FLATCC_LDFLAGS) $(FLATCC_LIBS)
 
 test_posix_cppflags = $(AM_CPPFLAGS) $(MPI_CFLAGS) -DDISABLE_UNIFYCR
 test_posix_ldadd    = -lrt -lm
@@ -180,6 +187,11 @@ writeread_static_CPPFLAGS = $(test_cppflags)
 writeread_static_LDADD    = $(test_static_ldadd)
 writeread_static_LDFLAGS  = $(test_static_ldflags)
 
+writeread_ftn_SOURCES  = writeread.f90
+writeread_ftn_FCFLAGS  = $(test_ftn_flags)
+writeread_ftn_LDADD    = $(test_ftn_ldadd)
+writeread_ftn_LDFLAGS  = $(test_ftn_ldflags)
+
 app_mpiio_gotcha_SOURCES  = app-mpiio.c
 app_mpiio_gotcha_CPPFLAGS = $(test_cppflags)
 app_mpiio_gotcha_LDADD    = $(test_gotcha_ldadd)
diff --git a/examples/src/writeread.f90 b/examples/src/writeread.f90
new file mode 100644
index 000000000..9eea4fb97
--- /dev/null
+++ b/examples/src/writeread.f90
@@ -0,0 +1,57 @@
+	program write_read_F
+
+	implicit none
+
+	include 'mpif.h'
+	include 'unifycrf.h'
+
+	character*1024 :: basefname = "file"
+	character*1024 :: fname, file_suffix
+	character*1024 :: prefix = "/unifycr"
+	integer(kind=4) :: flag;
+	integer(kind=4) :: outflags;
+	integer(kind=4) :: valid;
+
+	integer, parameter :: ni=20, nj=30, nk=45
+	integer :: loop_count=5
+
+	integer(kind=8), dimension(ni,nj,nk) :: W1, R1
+
+	integer :: ierr, errors, all_errors, nprocs, mynod, ios
+	integer :: i,j,k,loop
+
+	integer :: writeunit, readunit
+	integer(kind=8) :: nodeoff
+
+!	integer (kind = 8) :: total_bytes_transferred
+	real (kind = 8) :: total_bytes_transferred
+	real (kind = 4) overall_transfer_rate
+	real (kind = 8) time0, time1, iter_time0, iter_time1
+
+	call MPI_INIT(ierr)
+	call MPI_COMM_SIZE(MPI_COMM_WORLD, nprocs, ierr)
+	call MPI_COMM_RANK(MPI_COMM_WORLD, mynod, ierr)
+
+	call UNIFYCR_MOUNT(prefix, mynod, nprocs, 0, ierr)
+
+	nodeoff=2**21
+
+	fname = trim(prefix) // "/" // trim(basefname) // ".ckpt"
+
+	forall(i=1:ni,j=1:nj,k=1:nk) &
+	 W1(i,j,k) = nodeoff*mynod+i+ni*(j-1+nj*(k-1))
+
+	open(unit=writeunit,file=fname,form='unformatted',action='write')
+	     
+	write(writeunit,iostat=ios) W1
+	close(writeunit)
+
+!	R1 = 0
+!	open(unit=readunit,file=fname,form='unformatted',action='read')
+!	read(readunit,iostat=ios) R1
+!	close(readunit)
+
+	call UNIFYCR_UNMOUNT(ierr)
+	call MPI_FINALIZE(ierr)
+
+	end program write_read_F