platform-specific debug header (included from sysdep/debug) is responsible for defining debug_break, or mapping it to the implementation function (result: if can be defined as a macro (e.g. on win32 or ia32), debugger breaks directly at the target location, instead of one function lower)

This was SVN commit r1812.

source/lib/sysdep/unix/udbg.cpp

@@ -26,7 +26,7 @@ void unix_debug_break()
 /*
 Start the debugger and tell it to attach to the current process/thread
 */
-int unix_launch_debugger()
+static int launch_debugger()
 {
 	pid_t orgpid=getpid();
 	pid_t ret=fork();
@@ -84,7 +84,7 @@ int debug_assert_failed(const char *file, int line, const char *expr)
 			case 'b':
 				return 2;
 			case 'd':
-				return unix_launch_debugger();
+				return launch_debugger();
 			case 'c':
 				return 0;
 			case 's':

source/lib/sysdep/unix/udbg.h

@@ -0,0 +1,5 @@
+// sysdep/unix/debug.h: included from sysdep/debug.h and sysdep/unix/debug.cpp
+
+#define debug_break unix_debug_break
+
+extern void unix_debug_break(void);