include: Add extern "C" to the exported Wine headers.

include/wine/exception.h

@@ -25,6 +25,10 @@
 #include <windef.h>
 #include <excpt.h>
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /* The following definitions allow using exceptions in Wine and Winelib code
  *
  * They should be used like this:
@@ -329,4 +333,8 @@ static inline DWORD __wine_finally_handler( EXCEPTION_RECORD *record,
 
 #endif /* USE_COMPILER_EXCEPTIONS */
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif  /* __WINE_WINE_EXCEPTION_H */

include/wine/library.h

@@ -31,6 +31,10 @@
 #error This file should not be used in Wine tests
 #endif
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /* configuration */
 
 extern const char *wine_get_build_dir(void);
@@ -212,4 +216,8 @@ __DEFINE_SET_SEG(gs)
 #undef __DEFINE_GET_SEG
 #undef __DEFINE_SET_SEG
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif  /* __WINE_WINE_LIBRARY_H */

include/wine/unicode.h

@@ -31,6 +31,10 @@
 #error This file should not be used in Wine tests
 #endif
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #ifndef WINE_UNICODE_API
 # if defined(_MSC_VER) || defined(__MINGW32__)
 #  define WINE_UNICODE_API DECLSPEC_IMPORT
@@ -331,4 +335,8 @@ WINE_UNICODE_INLINE int atoiW( const WCHAR *str )
 
 #undef WINE_UNICODE_INLINE
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif  /* __WINE_WINE_UNICODE_H */