Added unistd.h include to fix issues with GCC 4.7+

divine/output.cpp

+#include <unistd.h>
 #include <wibble/sys/mutex.h>
 #include <iostream>
 

tools/compile.h

 // -*- C++ -*- (c) 2010 Petr Rockai <me@mornfall.net>
 
+#include <unistd.h>
 #include <wibble/commandline/parser.h>
 #include <wibble/string.h>
 #include "dvecompile.h"

wibble/commandline/options.cpp

@@ -6,6 +6,7 @@
 #include <errno.h>
 #include <cstdlib>
 #include <set>
+#include <unistd.h>
 #include <cstdlib>
 #include <sstream>
 

wibble/exception.test.h

@@ -18,6 +18,7 @@
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307  USA
  */
 
+#include <unistd.h>
 #include <wibble/test.h>
 #include <wibble/exception.h>
 #include <errno.h>

wibble/sys/childprocess.test.h

@@ -2,6 +2,7 @@
    (c) 2007 Enrico Zini <enrico@enricozini.org> */
 #include <wibble/sys/childprocess.h>
 
+#include <unistd.h>
 #ifdef POSIX
 #include <wibble/sys/process.h>
 #include <wibble/sys/exec.h>

wibble/sys/fs.cpp

@@ -2,6 +2,7 @@
 #include <wibble/sys/process.h>
 #include <wibble/string.h>
 #include <wibble/exception.h>
+#include <unistd.h>
 #include <fstream>
 #include <sys/stat.h>
 #include <errno.h>

wibble/sys/fs.test.h

 /* -*- C++ -*- (c) 2007 Petr Rockai <me@mornfall.net>
                (c) 2007 Enrico Zini <enrico@enricozini.org> */
 #include <wibble/sys/fs.h>
+#include <unistd.h>
 #include <cstdlib>
 #include <set>
 #include <cstdlib>

wibble/sys/signal.test.h

 /* -*- C++ -*- (c) 2009 Enrico Zini <enrico@enricozini.org> */
 #include <wibble/sys/signal.h>
+#include <unistd.h>
 #include <set>
 #include <cstdlib>
 

wibble/sys/thread.h

@@ -21,6 +21,7 @@
 #ifndef WIBBLE_SYS_THREAD_H
 #define WIBBLE_SYS_THREAD_H
 
+#include <unistd.h>
 #include <wibble/sys/macros.h>
 #include <wibble/exception.h>
 #ifdef POSIX