Support build with OpenAL-Soft on Windows

code/nel/src/sound/driver/openal/CMakeLists.txt

@@ -36,8 +36,11 @@ NL_ADD_LIB_SUFFIX(${NLDRV_AL_LIB})
 IF(WIN32)
   # Find and include EFX-Util on Windows.
   FIND_PACKAGE(EFXUtil)
+  IF(EFXUTIL_FOUND)
     INCLUDE_DIRECTORIES(${EFXUTIL_INCLUDE_DIR})
     TARGET_LINK_LIBRARIES(${NLDRV_AL_LIB} ${EFXUTIL_LIBRARY})
+    ADD_DEFINITIONS(-DEFX_CREATIVE_AVAILABLE=1)
+  ENDIF()
 ENDIF()
 
 IF(WITH_PCH)

code/nel/src/sound/driver/openal/ext_al.h

@@ -17,11 +17,11 @@
 #ifndef NL_EXT_AL_H
 #define NL_EXT_AL_H
 
-#ifdef NL_OS_WINDOWS
-#	define EFX_CREATIVE_AVAILABLE 1
-#	define EAX_AVAILABLE 0
-#else
+#ifndef EFX_CREATIVE_AVAILABLE
 #define EFX_CREATIVE_AVAILABLE 0
+#endif
+
+#ifndef EAX_AVAILABLE
 #define EAX_AVAILABLE 0
 #endif