Patch by Philip Kime <Philip@kime.org.uk> (https://www.illumos.org/attachments/1768).

Reported as https://sourceforge.net/p/gsoap2/bugs/1247/.

--- gsoap-2.8/gsoap/stdsoap2.cpp	Thu Apr 18 22:09:34 2019
+++ gsoap-2.8/gsoap/stdsoap2.cpp	Wed Apr 24 21:43:51 2019
@@ -5066,7 +5066,10 @@
 static int
 tcp_gethostbyname(struct soap *soap, const char *addr, struct hostent *hostent, struct in_addr *inaddr)
 {
-#if defined(__GLIBC__) && (!_GNU_SOURCE && !defined(_POSIX_C_SOURCE) && !defined(_XOPEN_SOURCE) && defined(HAVE_GETHOSTBYNAME_R)) || _POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE >= 600 || defined(__ANDROID__) || (defined(HAVE_GETHOSTBYNAME_R) && (defined(FREEBSD) || defined(__FreeBSD__)))
+#if defined(SUN_OS)
+  char *tmpbuf = soap->tmpbuf;
+  size_t tmplen = sizeof(soap->tmpbuf);
+#elif (defined(__GLIBC__) && (!_GNU_SOURCE && !defined(_POSIX_C_SOURCE) && !defined(_XOPEN_SOURCE) && defined(HAVE_GETHOSTBYNAME_R)) || _POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE >= 600 || defined(__ANDROID__) || (defined(HAVE_GETHOSTBYNAME_R) && (defined(FREEBSD) || defined(__FreeBSD__))))
   int r;
   char *tmpbuf = soap->tmpbuf;
   size_t tmplen = sizeof(soap->tmpbuf);
@@ -5094,7 +5097,10 @@
       return SOAP_OK;
     }
   }
-#if defined(__GLIBC__) && (!_GNU_SOURCE && !defined(_POSIX_C_SOURCE) && !defined(_XOPEN_SOURCE) && defined(HAVE_GETHOSTBYNAME_R)) || _POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE >= 600 || defined(__ANDROID__) || (defined(HAVE_GETHOSTBYNAME_R) && (defined(FREEBSD) || defined(__FreeBSD__)))
+
+#if defined(SUN_OS)
+  hostent = gethostbyname_r(addr, hostent, tmpbuf, tmplen, &soap->errnum);
+#elif (defined(__GLIBC__) && (!_GNU_SOURCE && !defined(_POSIX_C_SOURCE) && !defined(_XOPEN_SOURCE) && defined(HAVE_GETHOSTBYNAME_R)) || _Posix_C_SOURCE >= 200112L || _XOPEN_SOURCE >= 600 || defined(__ANDROID__) || (defined(HAVE_GETHOSTBYNAME_R) && (defined(FREEBSD) || defined(__FreeBSD__))))
   while ((r = gethostbyname_r(addr, hostent, tmpbuf, tmplen, &hostent, &soap->errnum)) < 0)
   {
     if (tmpbuf != soap->tmpbuf)