Fixed mingw build.

[simgear.git] / CMakeLists.txt

diff --git a/CMakeLists.txt b/CMakeLists.txt
index f1e985adbf15f4850ba2c9830d23cba50f8e2074..4b3c0e10d326536e777ed4775c9cb6a208b32100 100644 (file)
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -115,7 +115,6 @@ find_package(Threads REQUIRED)
 
 if(SIMGEAR_HEADLESS)
     message(STATUS "headless mode")
-    set(NO_OPENSCENEGRAPH_INTERFACE 1)
 else()
     find_package(OpenGL REQUIRED)
     find_package(OpenAL REQUIRED)
@@ -202,6 +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)