--- configure.ac.orig	2012-11-21 22:34:12.148598606 +0100
+++ configure.ac	2012-11-21 22:35:17.036673433 +0100
@@ -112,6 +112,13 @@
 AM_CONDITIONAL([COMPAT_OPT], [test "$want_compat" = yes])
 AM_CONDITIONAL([ENABLE_EXPORT], [test "$want_export" = yes])
 
+if test x$host_os = xmingw32
+then
+  AM_CONDITIONAL(WIN32, true)
+else
+  AM_CONDITIONAL(WIN32, false)
+fi
+
 # Initialize the test suite.
 AC_CONFIG_TESTDIR(tests)
 AC_CONFIG_FILES([tests/Makefile tests/atlocal po/Makefile.in])
--- src/Makefile.am.orig	2012-11-21 22:27:53.410325014 +0100
+++ src/Makefile.am	2012-11-21 22:33:13.957634294 +0100
@@ -60,7 +60,10 @@
  update.c\
  version.c
 
-libgdbm_la_LDFLAGS = -version-info $(VI_CURRENT):$(VI_REVISION):$(VI_AGE)
+libgdbm_la_LDFLAGS = -version-info $(VI_CURRENT):$(VI_REVISION):$(VI_AGE) -no-undefined
+if WIN32
+libgdbm_la_LDFLAGS += -lws2_32
+endif
 
 # Programs
 bin_PROGRAMS = testgdbm 
--- src/update.c.orig	2012-11-21 22:25:32.667991693 +0100
+++ src/update.c	2012-11-21 22:27:07.567564969 +0100
@@ -39,8 +39,10 @@
     _gdbm_fatal (dbf, gdbm_strerror (rc));
 
   /* Sync the file if fast_write is FALSE. */
+#ifdef HAVE_FSYNC
   if (dbf->fast_write == FALSE)
     __fsync (dbf);
+#endif
 }
 
 
@@ -84,8 +86,10 @@
       if (rc)
 	_gdbm_fatal (dbf, gdbm_strerror (rc));
       dbf->directory_changed = FALSE;
+#ifdef HAVE_FSYNC
       if (!dbf->header_changed && dbf->fast_write == FALSE)
 	__fsync (dbf);
+#endif
     }
 
   /* Final write of the header. */
--- src/gdbmsync.c.orig	2012-11-21 22:30:53.253304003 +0100
+++ src/gdbmsync.c	2012-11-21 22:31:02.123450829 +0100
@@ -31,7 +31,8 @@
   /* Initialize the gdbm_errno variable. */
   gdbm_errno = GDBM_NO_ERROR;
 
+#ifdef HAVE_FSYNC
   /* Do the sync on the file. */
   __fsync (dbf);
-
+#endif
 }
--- src/gdbmopen.c.orig	2012-11-21 22:29:23.495815449 +0100
+++ src/gdbmopen.c	2012-11-21 22:29:37.659050171 +0100
@@ -316,8 +316,10 @@
 	  return NULL;
 	}
 
+#ifdef HAVE_FSYNC
       /* Wait for initial configuration to be written to disk. */
       __fsync (dbf);
+#endif
 
       free (dbf->bucket);
     }
--- src/gdbmclose.c.orig	2012-11-21 22:30:04.928503285 +0100
+++ src/gdbmclose.c	2012-11-21 22:30:14.862667066 +0100
@@ -31,9 +31,11 @@
 {
   int index;	/* For freeing the bucket cache. */
 
+#ifdef HAVE_FSYNC
   /* Make sure the database is all on disk. */
   if (dbf->read_write != GDBM_READER)
     __fsync (dbf);
+#endif
 
   /* Close the file and free all malloced memory. */
 #if HAVE_MMAP
--- src/flatfile.c.orig	2012-11-21 22:24:10.761635975 +0100
+++ src/flatfile.c	2012-11-21 22:25:17.785745935 +0100
@@ -20,7 +20,12 @@
 
 /* Include system configuration before all else. */
 # include "autoconf.h"
+
+#ifdef WIN32
+# include <winsock2.h>
+#else
 # include <arpa/inet.h>
+#endif
 
 # include "gdbmdefs.h"
 # include "gdbm.h"
--- src/gdbmreorg.c.orig	2012-11-21 22:30:26.776863411 +0100
+++ src/gdbmreorg.c	2012-11-21 22:30:37.976049148 +0100
@@ -207,8 +207,10 @@
   free (new_dbf);
   free (new_name);
 
+#ifdef HAVE_FSYNC
   /* Make sure the new database is all on disk. */
   __fsync (dbf);
+#endif
 
   /* Force the right stuff for a correct bucket cache. */
   dbf->cache_entry    = &dbf->bucket_cache[0];
--- src/testgdbm.c.orig	2012-11-21 22:26:25.044859194 +0100
+++ src/testgdbm.c	2012-11-21 22:27:24.536844574 +0100
@@ -27,7 +27,9 @@
 #include <errno.h>
 #include <ctype.h>
 #include <signal.h>
+#ifndef WIN32
 #include <sys/ioctl.h>
+#endif
 #ifdef HAVE_SYS_TERMIOS_H
 # include <sys/termios.h>
 #endif
@@ -1126,7 +1128,9 @@
       -1)
     error (2, _("gdbm_setopt failed: %s"), gdbm_strerror (gdbm_errno));
 
+#ifndef WIN32
   signal (SIGPIPE, SIG_IGN);
+#endif
 
   /* Welcome message. */
   if (interactive)
--- src/gdbmopen.c.orig	2016-05-20 11:25:15.782413771 -0500
+++ src/gdbmopen.c	2016-05-20 11:25:32.365583402 -0500
@@ -128,7 +128,7 @@
     }
   else
     dbf->cloexec = FALSE;
-  
+  fbits |= O_BINARY;
   /* Open the file. */
   need_trunc = FALSE;
   switch (flags & GDBM_OPENMASK)
--- src/systems.h-orig	2016-05-20 12:13:13.000000000 -0500
+++ src/systems.h	2016-05-20 12:15:22.406067106 -0500
@@ -63,7 +63,8 @@
 #if HAVE_FTRUNCATE
 # define TRUNCATE(dbf) ftruncate (dbf->desc, 0)
 #else
-# define TRUNCATE(dbf) close( open (dbf->name, O_RDWR|O_TRUNC, mode));
+# define TRUNCATE(dbf) close( open (dbf->name, O_RDWR|O_TRUNC|O_BINARY, mode));
+
 #endif
 
 #ifndef STDERR_FILENO