msvc: Fix compilation errors in compat/win32/sys/poll.c

Ramsay Jones · gitster · commit 56fb3ddc89ab · 2010-12-09T11:13:55.000-08:00
The msvc winsock2.h header file conditionally defines or declares
poll() related symbols which cause many macro redefinition errors,
a struct type redefinition error and syntax errors. These symbols
are defined in support of the WSAPoll() API, new in Windows Vista,
when the symbol _WIN32_WINNT is defined and _WIN32_WINNT &gt;= 0x0600.

In order to avoid the compilation errors, we set _WIN32_WINNT to
0x0502 (which would target Windows Server 2003) prior to including
the winsock2.h header file.

Signed-off-by: Ramsay Jones &lt;ramsay@ramsay1.demon.co.uk&gt;
Acked-by: Erik Faye-Lund &lt;kusmabite@gmail.com&gt;
Signed-off-by: Junio C Hamano &lt;gitster@pobox.com&gt;
diff --git a/compat/win32/sys/poll.c b/compat/win32/sys/poll.c
@@ -34,6 +34,9 @@
 
 #if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
 # define WIN32_NATIVE
+# if defined (_MSC_VER)
+#  define _WIN32_WINNT 0x0502
+# endif
 # include <winsock2.h>
 # include <windows.h>
 # include <io.h>
