Allow building with backtrace symbols.

src/archutils/Unix/BacktraceNames.cpp

@@ -97,7 +97,7 @@ RString BacktraceNames::Format() const
 #if defined(BACKTRACE_LOOKUP_METHOD_DLADDR)
 /* This version simply asks libdl, which is more robust. */
 #include <dlfcn.h>
-void BacktraceNames::FromAddr( const void *p )
+void BacktraceNames::FromAddr( void * const p )
 {
     Address = (intptr_t) p;
 
@@ -222,7 +222,7 @@ static const char *osx_find_link_edit( const struct mach_header *header )
 	return NULL;
 }
 
-void BacktraceNames::FromAddr( const void *p )
+void BacktraceNames::FromAddr( void * const p )
 {
 	Address = (intptr_t) p;
 
@@ -294,7 +294,7 @@ void BacktraceNames::FromAddr( const void *p )
 #elif defined(BACKTRACE_LOOKUP_METHOD_BACKTRACE_SYMBOLS)
 /* This version parses backtrace_symbols(), an doesn't need libdl. */
 #include <execinfo.h>
-void BacktraceNames::FromAddr( const void *p )
+void BacktraceNames::FromAddr( void * const p )
 {
     Address = (intptr_t) p;
 
@@ -342,7 +342,7 @@ void BacktraceNames::FromString( RString s )
 }
 #else
 #warning Undefined BACKTRACE_LOOKUP_METHOD_*
-void BacktraceNames::FromAddr( const void *p )
+void BacktraceNames::FromAddr( void * const p )
 {
     Address = intptr_t(p);
     Offset = 0;

src/archutils/Unix/BacktraceNames.h

@@ -6,7 +6,7 @@ struct BacktraceNames
 	RString Symbol, File;
 	intptr_t Address;
 	int Offset;
-	void FromAddr( const void *p );
+	void FromAddr( void * const p );
 	void FromString( RString str );
 	void Demangle();
 	RString Format() const;

src/archutils/Unix/CrashHandlerChild.cpp

@@ -46,7 +46,7 @@ static void output_stack_trace( FILE *out, const void **BacktracePointers )
 	for( int i = 0; BacktracePointers[i]; ++i)
 	{
 		BacktraceNames bn;
-		bn.FromAddr( BacktracePointers[i] );
+		bn.FromAddr( const_cast<void *>(BacktracePointers[i]) );
 		bn.Demangle();
 
 		/* Don't show the main module name. */