cross compile for window on ubuntu error: no TunnelType member in struct IPADAPTER_ADDRESS

[anzyelay]

libiio/dns_sd_windows.c

Line 82 in 740b3f4

if (adapter->TunnelType == TUNNEL_TYPE_TEREDO)

when i cross compile it ,i found the definitions _WIN32_WINNT means XP, so the struct in iptypes.h pointer to an XP struct which has no member TunnelType.

[anzyelay]

i have resolved it in temporary as follow:

diff --git a/CMakeLists.txt b/CMakeLists.txt
index c044fe0..121ad48 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -312,6 +312,7 @@ if(WITH_NETWORK_BACKEND)
                list(APPEND LIBS_TO_LINK ${AVAHI_LIBRARIES})
        elseif(WIN32)
                set(HAVE_DNS_SD ON)
+               set(CMAKE_C_FLAGS "-D_WIN32_WINNT=0x0600 ${CMAKE_C_FLAGS}")
                list(APPEND LIBIIO_CFILES dns_sd_windows.c dns_sd.c)
                if (CMAKE_COMPILER_IS_GNUCC OR CMAKE_C_COMPILER_ID STREQUAL "Clang")
                        set_source_files_properties(dns_sd_windows.c PROPERTIES COMPILE_FLAGS "-Wno-unused-function")
diff --git a/mdns.h b/mdns.h
index 58a5bb5..7e164f7 100644
--- a/mdns.h
+++ b/mdns.h
@@ -22,8 +22,8 @@
 
 #include <fcntl.h>
 #ifdef _WIN32
-#include <Winsock2.h>
-#include <Ws2tcpip.h>
+#include <winsock2.h>
+#include <ws2tcpip.h>
 #define strncasecmp _strnicmp
 #else
 #include <unistd.h>

[rgetz]

Thanks for the report.

_WIN32_WINNT should be set by the compiler where _WIN32_WINNT >= 0x600 means one of:

#define _WIN32_WINNT_WIN6                   0x0600 // Windows Vista
#define _WIN32_WINNT_VISTA                  0x0600 // Windows Vista
#define _WIN32_WINNT_WS08                   0x0600 // Windows Server 2008
#define _WIN32_WINNT_LONGHORN               0x0600 // Windows Vista
#define _WIN32_WINNT_WIN7                   0x0601 // Windows 7
#define _WIN32_WINNT_WIN8                   0x0602 // Windows 8
#define _WIN32_WINNT_WINBLUE                0x0603 // Windows 8.1
#define _WIN32_WINNT_WINTHRESHOLD           0x0A00 // Windows 10
#define _WIN32_WINNT_WIN10                  0x0A00 // Windows 10

None of those should mean:

#define _WIN32_WINNT_WINXP                  0x0501 // Windows XP

maybe your cross compiler is set up wrong? Can you describe your build system more?

We build naively with mingw and MSStudio - and have not run into this.

[dNechita]

I have run into this issue when cross compiling iio-oscilloscope on Ubuntu 18.04 for Windows. What I did, was to set _WIN32_WINNT while generating the build system (without changing the CMakefiles.txt content). See here (analogdevicesinc/iio-osc-mingw@5908ee7)

[rgetz]

MinGW Doc does indicated these need to be set by hand before including windows.h header file. Shouldn't we then just include this in the CMake based on IF(MINGW) ? Cmake Doc

[dNechita]

Yes, I think we should include these definitions when MINGW is used since the dns_sd code for windows won't compile if _WIN32_WINNT points to some old versions of Windows.

[rgetz]

I think this is now fixed in #574