GUACAMOLE-325: Explicitly check for Winsock.

configure.ac

@@ -89,9 +89,6 @@ AC_CHECK_DECL([uuid_make],,
 # cunit
 AC_CHECK_LIB([cunit], [CU_run_test], [CUNIT_LIBS=-lcunit])
 
-# WinSock
-AC_CHECK_LIB([wsock32], [main])
-
 AC_SUBST(DL_LIBS)
 AC_SUBST(MATH_LIBS)
 AC_SUBST(PNG_LIBS)
@@ -295,6 +292,30 @@ fi
 AM_CONDITIONAL([ENABLE_SSL], [test "x${have_ssl}" = "xyes"])
 AC_SUBST(SSL_LIBS)
 
+#
+# Winsock
+#
+
+have_winsock=disabled
+WINSOCK_LIBS=
+AC_ARG_WITH([winsock],
+            [AS_HELP_STRING([--with-winsock],
+                            [support Windows Sockets API @<:@default=check@:>@])],
+            [],
+            [with_winsock=check])
+
+if test "x$with_winsock" != "xno"
+then
+    have_winsock=yes
+    AC_CHECK_LIB([wsock32], [main],
+                 [WINSOCK_LIBS="-lwsock32"]
+                 [AC_DEFINE([ENABLE_WINSOCK],,
+                            [Whether Windows Socket API support is enabled])],
+                 [have_winsock=no])
+fi
+
+AM_CONDITIONAL([ENABLE_WINSOCK], [test "x${have_winsock}" = "xyes"])
+AC_SUBST(WINSOCK_LIBS)
 
 #
 # Ogg Vorbis
@@ -1234,6 +1255,7 @@ $PACKAGE_NAME version $PACKAGE_VERSION
      libvorbis ........... ${have_vorbis}
      libpulse ............ ${have_pulse}
      libwebp ............. ${have_webp}
+     wsock32 ............. ${have_winsock}
 
    Protocol support:
 

src/libguac/Makefile.am

@@ -122,5 +122,6 @@ libguac_la_LDFLAGS =     \
     @SSL_LIBS@           \
     @UUID_LIBS@          \
     @VORBIS_LIBS@        \
-    @WEBP_LIBS@
+    @WEBP_LIBS@          \
+    @WINSOCK_LIBS@
 

src/libguac/socket-fd.c

@@ -31,7 +31,7 @@
 #include <sys/time.h>
 #include <unistd.h>
 
-#ifdef __MINGW32__
+#ifdef ENABLE_WINSOCK
 #include <winsock2.h>
 #endif
 
@@ -100,8 +100,8 @@ ssize_t guac_socket_fd_write(guac_socket* socket,
 
         int retval;
 
-#ifdef __MINGW32__
-        /* MINGW32 WINSOCK only works with send() */
+#ifdef ENABLE_WINSOCK
+        /* WSA only works with send() */
         retval = send(data->fd, buf, count, 0);
 #else
         /* Use write() for all other platforms */
@@ -148,8 +148,8 @@ static ssize_t guac_socket_fd_read_handler(guac_socket* socket,
 
     int retval;
 
-#ifdef __MINGW32__
-    /* MINGW32 WINSOCK only works with recv() */
+#ifdef ENABLE_WINSOCK
+    /* Winsock only works with recv() */
     retval = recv(data->fd, buf, count, 0);
 #else
     /* Use read() for all other platforms */

src/libguac/wait-fd.c

@@ -19,7 +19,7 @@
 
 #include "config.h"
 
-#ifdef __MINGW32__
+#ifdef ENABLE_WINSOCK
 #    include <winsock2.h>
 #else
 #    ifdef HAVE_POLL