getaddrinfo tests: fix test failure on MSVC

[Bruno Haible]

On native Windows with MSVC, I observe this test failure:

FAIL: test-getaddrinfo
======================

FAIL test-getaddrinfo.exe (exit status: 4)

The cause is a missing call to WSAStartup(). This patch fixes it.


2019-07-02  Bruno Haible  <address@hidden>

        getaddrinfo tests: Fix test failure on MSVC.
        * tests/test-getaddrinfo.c: Include sockets.h.
        (main): Invoke gl_sockets_startup.
        * modules/getaddrinfo-tests (Depends-on): Add sockets.

diff --git a/tests/test-getaddrinfo.c b/tests/test-getaddrinfo.c
index 2f9dcc3..41910ec 100644
--- a/tests/test-getaddrinfo.c
+++ b/tests/test-getaddrinfo.c
@@ -39,6 +39,8 @@ SIGNATURE_CHECK (getaddrinfo, int, (char const *, char const 
*,
 #include <stdio.h>
 #include <string.h>
 
+#include "sockets.h"
+
 /* Whether to print debugging messages.  */
 #define ENABLE_DEBUGGING 0
 
@@ -167,6 +169,8 @@ simple (char const *host, char const *service)
 
 int main (void)
 {
+  (void) gl_sockets_startup (SOCKETS_1_1);
+
   return simple (HOST1, SERV1)
     + simple (HOST2, SERV2)
     + simple (HOST3, SERV3)
diff --git a/modules/getaddrinfo-tests b/modules/getaddrinfo-tests
index 521cf68..64a7c2d 100644
--- a/modules/getaddrinfo-tests
+++ b/modules/getaddrinfo-tests
@@ -3,6 +3,7 @@ tests/signature.h
 tests/test-getaddrinfo.c
 
 Depends-on:
+sockets
 inet_ntop
 strerror