Ensure NULL is defined, before using it.

diff --git a/ChangeLog b/ChangeLog
index 47cbb39d84eba464155b529bc70e7568be235a9d..e842706fdb7941d18393bfdfabc1c7e944b118b9 100644 (file)
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2007-10-15  Bruno Haible  <bruno@clisp.org>
+
+       * m4/getaddrinfo.m4 (gl_GETADDRINFO, gl_PREREQ_GETADDRINFO): Include
+       <stdlib.h> before using NULL.
+
 2007-10-15  Simon Josefsson  <simon@josefsson.org>
 
        * m4/getaddrinfo.m4: Use NULL rather than 0 for pointers.

diff --git a/m4/getaddrinfo.m4 b/m4/getaddrinfo.m4
index df6077920a28e653d521d103bb761cef65f3bb35..0234c70d946495509e834da454365f964bd1dae6 100644 (file)
--- a/m4/getaddrinfo.m4
+++ b/m4/getaddrinfo.m4
@@ -35,6 +35,7 @@ AC_DEFUN([gl_GETADDRINFO],
 #ifdef HAVE_WS2TCPIP_H
 #include <ws2tcpip.h>
 #endif
+#include <stdlib.h>
 ], [getaddrinfo(NULL, NULL, NULL, NULL);], gl_cv_w32_getaddrinfo=yes)
     LIBS="$am_save_LIBS"])
     if test "$gl_cv_w32_getaddrinfo" = "yes"; then
@@ -60,6 +61,7 @@ AC_DEFUN([gl_GETADDRINFO],
 #ifdef HAVE_WS2TCPIP_H
 #include <ws2tcpip.h>
 #endif
+#include <stdlib.h>
 ], [gai_strerror (NULL);],
         [gl_cv_func_gai_strerror=yes],
         [gl_cv_func_gai_strerror=no])])
@@ -85,6 +87,7 @@ AC_DEFUN([gl_PREREQ_GETADDRINFO], [
 #ifdef HAVE_WINSOCK2_H
 #include <winsock2.h>
 #endif
+#include <stdlib.h>
 ], [gethostbyname(NULL);], gl_cv_w32_gethostbyname=yes)
     LIBS="$am_save_LIBS"])
     if test "$gl_cv_w32_gethostbyname" = "yes"; then