Revert "Remove non-portable and unnused header includes"

This reverts commit 7ef79d3f4b.

gtk2_ardour/about.cc

@@ -20,6 +20,7 @@
 #include <algorithm>
 #include <unistd.h>
 #include <sys/types.h>
+#include <sys/wait.h>
 #include <cstdio>
 #include <ctime>
 #include <cstdlib>

libs/ardour/audio_diskstream.cc

@@ -27,6 +27,8 @@
 #include <fcntl.h>
 #include <cstdlib>
 #include <ctime>
+#include <sys/stat.h>
+#include <sys/mman.h>
 
 #include "pbd/error.h"
 #include "pbd/xml++.h"

libs/ardour/audiosource.cc

@@ -20,6 +20,7 @@
 #include <sys/stat.h>
 #include <unistd.h>
 #include <fcntl.h>
+#include <poll.h>
 #include <float.h>
 #include <utime.h>
 #include <cerrno>

libs/ardour/diskstream.cc

@@ -29,6 +29,7 @@
 #include <cstdlib>
 #include <ctime>
 #include <sys/stat.h>
+#include <sys/mman.h>
 
 #include <glibmm/threads.h>
 

libs/ardour/midi_clock_slave.cc

@@ -20,6 +20,7 @@
 
 #include <cmath>
 #include <errno.h>
+#include <poll.h>
 #include <sys/types.h>
 #include <unistd.h>
 #include "pbd/error.h"

libs/ardour/midi_diskstream.cc

@@ -28,6 +28,7 @@
 #include <ctime>
 #include <strings.h> // for ffs(3)
 #include <sys/stat.h>
+#include <sys/mman.h>
 
 #include "pbd/error.h"
 #include "pbd/basename.h"

libs/ardour/midi_source.cc

@@ -20,6 +20,7 @@
 #include <sys/stat.h>
 #include <unistd.h>
 #include <fcntl.h>
+#include <poll.h>
 #include <float.h>
 #include <cerrno>
 #include <ctime>

libs/ardour/mtc_slave.cc

@@ -19,6 +19,7 @@
 */
 #include <iostream>
 #include <errno.h>
+#include <poll.h>
 #include <sys/types.h>
 #include <unistd.h>
 

libs/ardour/session_butler.cc

@@ -17,6 +17,16 @@
 
 */
 
+#include <algorithm>
+#include <string>
+#include <cmath>
+#include <cerrno>
+#include <unistd.h>
+#include <fcntl.h>
+#include <poll.h>
+
+#include <glibmm/threads.h>
+
 #include "pbd/error.h"
 #include "pbd/pthread_utils.h"
 #include "pbd/stacktrace.h"

libs/ardour/session_midi.cc

@@ -22,6 +22,8 @@
 #include <cerrno>
 #include <cassert>
 #include <unistd.h>
+#include <fcntl.h>
+#include <poll.h>
 
 #include <boost/shared_ptr.hpp>
 

libs/ardour/session_state.cc

@@ -33,11 +33,17 @@
 #include <unistd.h>
 #include <sys/stat.h>
 #include <climits>
+#include <fcntl.h>
+#include <poll.h>
 #include <signal.h>
+#include <sys/mman.h>
 #include <sys/time.h>
 
 #ifdef HAVE_SYS_VFS_H
 #include <sys/vfs.h>
+#else
+#include <sys/param.h>
+#include <sys/mount.h>
 #endif
 
 #ifdef HAVE_SYS_STATVFS_H

libs/ardour/sndfilesource.cc

@@ -26,6 +26,8 @@
 #include <climits>
 #include <cstdarg>
 
+#include <pwd.h>
+#include <sys/utsname.h>
 #include <sys/stat.h>
 
 #include <glibmm/miscutils.h>

libs/ardour/source.cc

@@ -19,6 +19,8 @@
 
 #include <sys/stat.h>
 #include <unistd.h>
+#include <fcntl.h>
+#include <poll.h>
 #include <float.h>
 #include <cerrno>
 #include <ctime>

libs/pbd/sndfile_manager.cc

@@ -22,6 +22,7 @@
  */
 
 #include <sys/time.h>
+#include <sys/resource.h>
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <fcntl.h>