// See http://www.boost.org for most recent version.
-// All POSIX feature tests go in this file:
+// All POSIX feature tests go in this file,
+// Note that we test _POSIX_C_SOURCE and _XOPEN_SOURCE as well
+// _POSIX_VERSION and _XOPEN_VERSION: on some systems POSIX API's
+// may be present but none-functional unless _POSIX_C_SOURCE and
+// _XOPEN_SOURCE have been defined to the right value (it's up
+// to the user to do this *before* including any header, although
+// in most cases the compiler will do this for you).
-# ifdef BOOST_HAS_UNISTD_H
+# if defined(BOOST_HAS_UNISTD_H)
# include <unistd.h>
// XOpen has <nl_types.h>, but is this the correct version check?
# define BOOST_HAS_DIRENT_H
# endif
+ // POSIX version 3 requires <signal.h> to have sigaction:
+# if defined(_POSIX_VERSION) && (_POSIX_VERSION >= 199506L)
+# define BOOST_HAS_SIGACTION
+# endif
// POSIX defines _POSIX_THREADS > 0 for pthread support,
// however some platforms define _POSIX_THREADS without
// a value, hence the (_POSIX_THREADS+0 >= 0) check.
// Strictly speaking this may catch platforms with a
// non-functioning stub <pthreads.h>, but such occurrences should
// occur very rarely if at all.
-# if defined(_POSIX_THREADS) && (_POSIX_THREADS+0 >= 0) && !defined(BOOST_HAS_WINTHREADS)
+# if defined(_POSIX_THREADS) && (_POSIX_THREADS+0 >= 0) && !defined(BOOST_HAS_WINTHREADS) && !defined(BOOST_HAS_MPTASKS)
# define BOOST_HAS_PTHREADS
# endif
// in issue 4, version 2 (_XOPEN_VERSION > 500).
# if defined(_XOPEN_VERSION) && (_XOPEN_VERSION+0 >= 500)
# define BOOST_HAS_GETTIMEOFDAY
-# define BOOST_HAS_PTHREAD_MUTEXATTR_SETTYPE
+# if defined(_XOPEN_SOURCE) && (_XOPEN_SOURCE >= 500)
+# define BOOST_HAS_PTHREAD_MUTEXATTR_SETTYPE
+# endif
# endif
# endif
+
+