First steps towards supporting W32.

This is mainly source code reorganization.
Update gnulib.
g10/ does currently not build.

jnlib/dynload.h

@@ -0,0 +1,73 @@
+/* dynload.h - Wrapper functions for run-time dynamic loading
+ *      Copyright (C) 2003 Free Software Foundation, Inc.
+ *
+ * This file is part of JNLIB.
+ *
+ * JNLIB is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as
+ * published by the Free Software Foundation; either version 2.1 of
+ * the License, or (at your option) any later version.
+ *
+ * JNLIB is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+#ifndef LIBJNLIB_DYNLOAD_H
+#define LIBJNLIB_DYNLOAD_H
+
+#ifndef __MINGW32__
+# include <dlfcn.h>
+#else
+# include <windows.h>
+
+# define RTLD_LAZY 0
+
+static inline void *
+dlopen (const char * name, int flag)
+{
+  void * hd = LoadLibrary (name);
+  return hd;
+}
+
+static inline void *
+dlsym (void *hd, const char *sym)
+{
+  if (hd && sym)
+    {
+      void * fnc = GetProcAddress (hd, sym);
+      if (!fnc)
+        return NULL;
+      return fnc;
+    }
+  return NULL;
+}
+
+
+static inline const char *
+dlerror (void)
+{
+  static char buf[32];
+  sprintf (buf, "ec=%lu", GetLastError ());
+  return buf;
+}
+
+
+static inline int
+dlclose (void * hd)
+{
+  if (hd)
+    {
+      CloseHandle (hd);
+      return 0;
+    }
+  return -1;
+}  
+# endif /*__MINGW32__*/
+#endif /*LIBJNLIB_DYNLOAD_H*/