os: unexport internal logging functions

Lots of logging functions, especially init and teardown aren't called
by any drivers/modules, so no need to keep them exported.

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>

include/os.h

@@ -296,12 +296,6 @@ typedef enum {
     X_UNKNOWN = -1              /* unknown -- this must always be last */
 } MessageType;
 
-extern _X_EXPORT const char *
-LogInit(const char *fname, const char *backup);
-extern void
-LogSetDisplay(void);
-extern _X_EXPORT void
-LogClose(enum ExitCode error);
 extern _X_EXPORT void
 LogVMessageVerb(MessageType type, int verb, const char *format, va_list args)
 _X_ATTRIBUTE_PRINTF(3, 0);
@@ -312,7 +306,7 @@ extern _X_EXPORT void
 LogMessage(MessageType type, const char *format, ...)
 _X_ATTRIBUTE_PRINTF(2, 3);
 
-extern _X_EXPORT void
+void
 LogVHdrMessageVerb(MessageType type, int verb,
                    const char *msg_format, va_list msg_args,
                    const char *hdr_format, va_list hdr_args)
@@ -330,17 +324,11 @@ FatalError(const char *f, ...)
 _X_ATTRIBUTE_PRINTF(1, 2)
     _X_NORETURN;
 
-#ifdef DEBUG
-#define DebugF ErrorF
-#else
-#define DebugF(...)             /* */
-#endif
-
 extern _X_EXPORT void
 ErrorF(const char *f, ...)
 _X_ATTRIBUTE_PRINTF(1, 2);
-extern _X_EXPORT void
-LogPrintMarkers(void);
+
+void LogPrintMarkers(void);
 
 extern _X_EXPORT void
 xorg_backtrace(void);