Fixed mingw build.

.gitignore

@@ -12,5 +12,5 @@ CPackSourceConfig.cmake
 cmake_uninstall.cmake
 CTestTestfile.cmake
 install_manifest.txt
-build
+build*
 Build

CMakeLists.txt

@@ -201,6 +201,10 @@ endif(CMAKE_COMPILER_IS_GNUCXX)
 
 if(WIN32)
 
+    if(MINGW)
+        add_definitions(-D_WIN32_WINNT=0x501)
+    endif()
+
     if(MSVC)
         # turn off various warnings
         # foreach(warning 4244 4251 4267 4275 4290 4786 4305 4996)

simgear/io/test_binobj.cxx

@@ -9,7 +9,7 @@
 #include <cstdlib>
 #include <cstdio>
 
-#ifdef _MSC_VER
+#if defined _MSC_VER || defined _WIN32_WINNT
 #   define  random  rand
 #endif
 

simgear/misc/sg_dir.cxx

@@ -23,6 +23,8 @@
 #endif
 
 #include <simgear/misc/sg_dir.hxx>
+#include <math.h>
+#include <stdlib.h>
 
 #ifdef _WIN32
 #  define WIN32_LEAN_AND_MEAN