add missing symbols for fc26, u16.04, u17.04

I don't know why Ubuntu 17.04 introduces so many missing symbols to DCE
than others distributions.  But it contains to pass all tests of DCE.

Signed-off-by: Hajime Tazaki <thehajime@gmail.com>

model/dce-dl.h

@@ -1,3 +1,4 @@
 
 void *dce_dlopen(const char *filename, int flag);
 void *dce_dlsym(void *handle, const char *symbol);
+int dce_dlclose(void *handle);

model/dce-poll.cc

@@ -128,6 +128,11 @@ int dce_poll (struct pollfd *fds, nfds_t nfds, int timeout)
   return count;
 }
 
+int dce___poll_chk (struct pollfd *fds, nfds_t nfds, int timeout, size_t fdslen)
+{
+  return dce_poll(fds, nfds, timeout);
+}
+
 int dce_select (int nfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds,
                 struct timeval *timeout)
 {

model/dce-poll.h

@@ -8,6 +8,7 @@ extern "C" {
 #endif
 
 int dce_poll (struct pollfd *fds, nfds_t nfds, int timeout);
+int dce___poll_chk (struct pollfd *fds, nfds_t nfds, int timeout, size_t fdslen);
 
 #ifdef __cplusplus
 }

model/dce-string.cc

@@ -27,6 +27,14 @@ char * dce___strcpy_chk (char *__restrict __dest,
   return strcpy (__dest, __src);
 }
 
+void *dce___memcpy_chk (void *__restrict __dest,
+		       const void *__restrict __src, size_t __len,
+		       size_t __destlen)
+{
+  /// \todo Do actual checking
+  return memcpy (__dest, __src, __len);
+}
+
 char * dce_strpbrk (const char *s, const char *a)
 {
   return (char*) strpbrk (s, a);

model/dce-string.h

@@ -14,6 +14,9 @@ char * dce___strcpy_chk (char *__restrict __dest,
                          size_t __destlen);
 char * dce_strpbrk (const char *s, const char *accept);
 char * dce_strstr (const char *h, const char *n);
+void *dce___memcpy_chk (void *__restrict __dest,
+		       const void *__restrict __src, size_t __len,
+		       size_t __destlen);
 
 #ifdef __cplusplus
 }

model/libc-dce.cc

@@ -100,6 +100,14 @@
 #include <assert.h>
 #include <dlfcn.h>
 #include <link.h>
+#include <execinfo.h>
+#include <sched.h>
+#include <sys/mount.h>
+#include <sys/inotify.h>
+#include <regex.h>
+#include <iconv.h>
+#include <glob.h>
+#include <malloc.h>
 
 extern void __cxa_finalize (void *d);
 extern int __cxa_atexit (void (*func)(void *), void *arg, void *d);
@@ -118,6 +126,10 @@ extern int __xpg_strerror_r (int __errnum, char *__buf, size_t __buflen);
 extern char * __strcpy_chk (char *__restrict __dest,
                             const char *__restrict __src,
                             size_t __destlen);
+extern void *__memcpy_chk (void *__restrict __dest,
+                           const void *__restrict __src, size_t __len,
+                           size_t __destlen) __THROW;
+
 // from glibc's stdio.h
 extern int __sprintf_chk (char *, int, size_t, const char *, ...) __THROW;
 extern int __snprintf_chk (char *, size_t, int, size_t, const char *, ...)