Avoid multiple include of configunix.h

include/audacity/Types.h

@@ -249,6 +249,7 @@ typedef enum
 //            it ugly, but a part of the game.  Remove it when
 //            the API is complete.
 
+
 #if !defined(AUDACITY_DLL_API)
    // This was copied from "Audacity.h" so these headers wouldn't have
    // to include it.
@@ -273,7 +274,10 @@ typedef enum
    #endif //_MSC_VER
 
    #ifdef __GNUC__
-   #include "configunix.h"
+      #ifndef __CONFIG_UNIX_INCLUDED
+         #define __CONFIG_UNIX_INCLUDED
+         #include "configunix.h"
+      #endif
    #endif
 
    /* The GCC-elf implementation */

src/Audacity.h

@@ -124,7 +124,11 @@ void QuitAudacity();
 #endif
 
 #ifdef __WXGTK__
-#include "configunix.h"
+#ifndef __CONFIG_UNIX_INCLUDED
+   #define __CONFIG_UNIX_INCLUDED
+   #include "configunix.h"
+#endif
+
 // Some systems do not restrict the path length and therefore PATH_MAX is undefined
 #ifdef PATH_MAX
 #undef PLATFORM_MAX_PATH
@@ -133,7 +137,10 @@ void QuitAudacity();
 #endif
 
 #ifdef __WXX11__
-#include "configunix.h"
+#ifndef __CONFIG_UNIX_INCLUDED
+   #define __CONFIG_UNIX_INCLUDED
+   #include "configunix.h"
+#endif
 // wxX11 should also get the platform-specific definition of PLATFORM_MAX_PATH, so do not declare here.
 #endif