Add a check for IFADDR_NONE (Solaris doesn't have it; the man page for

inet_addr() says that it returns -1 upon failure).

This commit was SVN r5058.

configure.ac

@@ -946,7 +946,8 @@ AC_CHECK_HEADERS([alloca.h aio.h arpa/inet.h dirent.h dlfcn.h execinfo.h \
     sys/stat.h poll.h pthread.h pwd.h sched.h stdint.h string.hstrings.h stropts.h \
     sys/types.h sys/ipc.h sys/mman.h sys/resource.h sys/select.h sys/socket.h \
     sys/ioctl.h err.h sys/statvfs.h sys/time.h sys/uio.h sys/utsname.h sys/wait.h \
-    syslog.h termios.h ulimit.h unistd.h sys/param.h sys/tree.h sys/queue.h])
+    syslog.h termios.h ulimit.h unistd.h sys/param.h sys/tree.h sys/queue.h \
+    sys/sockio.h])
 
 # snprintf declaration
 # gethostname declaration
@@ -974,6 +975,15 @@ AC_DEFINE_UNQUOTED(OMPI_HAVE_SA_LEN, $VALUE,
     [Whether we have the sa_len struct in <sys/socket.h> or not])
 AC_MSG_RESULT([$MSG])
 
+# IFADDR_NONE
+AC_MSG_CHECKING([for INADDR_NONE])
+AC_COMPILE_IFELSE(AC_LANG_PROGRAM([[AC_INCLUDES_DEFAULT]],
+[[unsigned long inaddr = INADDR_NONE;]]),
+[MSG=yes VALUE=1], [MSG=no VALUE=0])
+AC_DEFINE_UNQUOTED(OMPI_HAVE_INADDR_NONE, $VALUE,
+    [Whether we have INADDR_NONE constant or not])
+AC_MSG_RESULT([$MSG])
+
 # union semun in sys/sem.h
 
 # Note that sometimes we have <stdbool.h>, but it doesn't work (e.g.,

src/util/if.c

@@ -26,6 +26,9 @@
 #ifdef HAVE_SYS_SOCKET_H
 #include <sys/socket.h>
 #endif
+#ifdef HAVE_SYS_SOCKIO_H
+#include <sys/sockio.h>
+#endif
 #ifdef HAVE_SYS_IOCTL_H
 #include <sys/ioctl.h>
 #endif
@@ -424,12 +427,19 @@ int ompi_ifaddrtoname(const char* if_addr, char* if_name, int length)
     inaddr = inet_addr(if_addr);
 
     rc = ompi_ifinit();
-    if(rc != OMPI_SUCCESS)
+    if (OMPI_SUCCESS != rc) {
         return rc;
+    }
 
-    if(inaddr == INADDR_NONE) {
+    if(
+#if OMPI_HAVE_INADDR_NONE
+       INADDR_NONE == inaddr
+#else
+       -1 == inaddr
+#endif
+       ) {
         h = gethostbyname(if_addr);
-        if(h == 0) {
+        if(0 == h) {
             ompi_output(0,"ompi_ifaddrtoname: unable to resolve %s\n", if_addr);
             return OMPI_ERR_NOT_FOUND;
         }