Some fixes for min gw (Thanks to Xan for the patch)

cmake/ACGCommon.cmake

@@ -66,7 +66,7 @@ endmacro ()
 
 
 # set directory structures for the different platforms
-if (WIN32)
+if (CMAKE_HOST_SYSTEM_NAME MATCHES Windows)
   set (ACG_PROJECT_DATADIR ".")
   set (ACG_PROJECT_LIBDIR "lib")
   set (ACG_PROJECT_BINDIR ".")

cmake/ACGCompiler.cmake

@@ -15,7 +15,7 @@ if ( WIN32 )
   set( ADDITIONAL_CMAKE_MODULE_LINKER_FLAGS )
   
   if ( WINDOWS_LARGE_MEMORY_SUPPORT )
-    if( NOT "${CMAKE_GENERATOR}" MATCHES "MinGW Makefiles")
+    if (MSVC)
 	list(APPEND ADDITIONAL_CMAKE_EXE_LINKER_FLAGS       "/LARGEADDRESSAWARE" )
 	list(APPEND ADDITIONAL_CMAKE_SHARED_LINKER_FLAGS    "/LARGEADDRESSAWARE" )
 	list(APPEND ADDITIONAL_CMAKE_MODULE_LINKER_FLAGS    "/LARGEADDRESSAWARE" )