GNU/Hurd support

configure.ac

@@ -138,6 +138,7 @@ libzmq_on_mingw32="no"
 libzmq_on_cygwin="no"
 libzmq_on_android="no"
 libzmq_on_linux="no"
+libzmq_on_gnu="no"
 
 # Set some default features required by 0MQ code.
 CPPFLAGS="-D_REENTRANT -D_THREAD_SAFE $CPPFLAGS"
@@ -145,6 +146,20 @@ CPPFLAGS="-D_REENTRANT -D_THREAD_SAFE $CPPFLAGS"
 # For host type checks
 AC_CANONICAL_HOST
 
+#For a working getsockopt() optname=SO_ERROR
+dnl AC_MSG_CHECKING([for getsockopt optname SO_ERROR)])
+dnl AC_TRY_COMPILE([
+dnl #include <sys/types.h>
+dnl #include <sys/socket.h>
+dnl ], [socklen_t t;], ac_cv_type_socklen_t=yes, ac_cv_type_socklen_t=no)
+dnl if test "x$ac_cv_type_socklen_t" = "xyes"; then
+dnl AC_MSG_RESULT([yes])
+dnl AC_DEFINE(HAVE_SOCKLEN_T,1,
+dnl   [Define if socklen_t is available])
+dnl   else
+dnl   AC_MSG_RESULT([no])
+dnl   fi
+
 # OS-specific tests
 case "${host_os}" in
     *linux*)
@@ -281,6 +296,17 @@ case "${host_os}" in
             AC_MSG_ERROR([Building static libraries is not supported under Cygwin])
         fi
         ;;
+    gnu*)
+        # Define on GNU/Hurd to enable all library features. Define if using a gnu compiler
+        if test "x$GXX" = "xyes"; then
+            CPPFLAGS="-D_GNU_SOURCE $CPPFLAGS"
+        fi
+        AC_DEFINE(ZMQ_HAVE_GNU, 1, [Have GNU/Hurd OS])
+        libzmq_on_gnu="yes"
+	AC_CHECK_LIB(rt, sem_init)
+dnl        AC_CHECK_LIB(uuid, uuid_generate, ,
+dnl            [AC_MSG_ERROR([cannot link with -luuid, install uuid-dev.])])
+        ;;
     *)
         AC_MSG_ERROR([unsupported system: ${host_os}.])
         ;;
@@ -530,6 +556,7 @@ AM_CONDITIONAL(ON_MINGW, test "x$libzmq_on_mingw32" = "xyes")
 AM_CONDITIONAL(ON_CYGWIN, test "x$libzmq_on_cygwin" = "xyes")
 AM_CONDITIONAL(ON_ANDROID, test "x$libzmq_on_android" = "xyes")
 AM_CONDITIONAL(ON_LINUX, test "x$libzmq_on_linux" = "xyes")
+AM_CONDITIONAL(ON_GNU, test "x$libzmq_on_gnu" = "xyes")
 
 # Check for __atomic_Xxx compiler intrinsics
 AC_LANG_PUSH([C++])

src/atomic_counter.hpp

@@ -45,7 +45,7 @@
 #define ZMQ_ATOMIC_COUNTER_ARM
 #elif defined ZMQ_HAVE_WINDOWS
 #define ZMQ_ATOMIC_COUNTER_WINDOWS
-#elif (defined ZMQ_HAVE_SOLARIS || defined ZMQ_HAVE_NETBSD)
+#elif (defined ZMQ_HAVE_SOLARIS || defined ZMQ_HAVE_NETBSD || defined ZMQ_HAVE_GNU)
 #define ZMQ_ATOMIC_COUNTER_ATOMIC_H
 #elif defined __tile__
 #define ZMQ_ATOMIC_COUNTER_TILE

src/atomic_ptr.hpp

@@ -46,7 +46,7 @@
 #define ZMQ_ATOMIC_PTR_TILE
 #elif defined ZMQ_HAVE_WINDOWS
 #define ZMQ_ATOMIC_PTR_WINDOWS
-#elif (defined ZMQ_HAVE_SOLARIS || defined ZMQ_HAVE_NETBSD)
+#elif (defined ZMQ_HAVE_SOLARIS || defined ZMQ_HAVE_NETBSD || defined ZMQ_HAVE_GNU)
 #define ZMQ_ATOMIC_PTR_ATOMIC_H
 #else
 #define ZMQ_ATOMIC_PTR_MUTEX

src/ipc_connecter.cpp

@@ -252,8 +252,11 @@ zmq::fd_t zmq::ipc_connecter_t::connect ()
     socklen_t len = sizeof (err);
 #endif
     int rc = getsockopt (s, SOL_SOCKET, SO_ERROR, (char*) &err, &len);
-    if (rc == -1)
+    if (rc == -1) {
+        if (errno == ENOPROTOOPT)
+            errno = 0;
         err = errno;
+    }
     if (err != 0) {
 
         //  Assert if the error was caused by 0MQ bug.

src/poller.hpp

@@ -48,6 +48,13 @@
 #include "poll.hpp"
 #elif defined ZMQ_USE_SELECT
 #include "select.hpp"
+#elif defined ZMQ_HAVE_GNU
+#define ZMQ_USE_SELECT
+#include "select.hpp"
+#if 0
+#define ZMQ_USE_POLL
+#include "poll.hpp"
+#endif
 #else
 #error None of the ZMQ_USE_* macros defined
 #endif

src/tcp_address.cpp

@@ -158,7 +158,7 @@ int zmq::tcp_address_t::resolve_nic_name (const char *nic_, bool ipv6_, bool is_
 #elif ((defined ZMQ_HAVE_LINUX || defined ZMQ_HAVE_FREEBSD ||\
     defined ZMQ_HAVE_OSX || defined ZMQ_HAVE_OPENBSD ||\
     defined ZMQ_HAVE_QNXNTO || defined ZMQ_HAVE_NETBSD ||\
-    defined ZMQ_HAVE_DRAGONFLY)\
+    defined ZMQ_HAVE_DRAGONFLY || defined ZMQ_HAVE_GNU)\
     && defined ZMQ_HAVE_IFADDRS)
 
 #include <ifaddrs.h>