Build in tracing by default and toggle on with ctrl-v

configure.ac

@@ -42,6 +42,12 @@ PLYMOUTH_LIBS="-lm -ldl $IMAGE_LIBS"
 AC_SUBST(PLYMOUTH_CFLAGS)
 AC_SUBST(PLYMOUTH_LIBS)
 
+AC_ARG_ENABLE(tracing, AS_HELP_STRING([--enable-tracing],[enable verbose tracing code]),enable_tracing=$enableval,enable_tracing=yes)
+
+if test x$enable_tracing = xyes; then
+  AC_DEFINE(PLY_ENABLE_TRACING, 1, [Build in verbose debug tracing spew])
+fi
+
 AC_OUTPUT([Makefile
            src/libply/Makefile
            src/splash-plugins/Makefile

src/main.c

@@ -478,8 +478,6 @@ main (int    argc,
       return EX_USAGE;
     }
 
-  ply_toggle_tracing ();
-
   state.loop = ply_event_loop_new ();
 
   /* before do anything we need to make sure we have a working 

src/ply-window.c

@@ -43,6 +43,7 @@
 #include "ply-logger.h"
 #include "ply-utils.h"
 
+#define KEY_CTRL_V '\026'
 #define KEY_ESCAPE '\033'
 
 struct _ply_window
@@ -89,6 +90,12 @@ process_keyboard_input (ply_window_t *window,
     {
       switch (key)
         {
+          case KEY_CTRL_V:
+            ply_trace ("toggle verbose mode!");
+            ply_toggle_tracing ();
+            ply_trace ("verbose mode toggled!");
+          return;
+
           case KEY_ESCAPE:
             ply_trace ("escape key!");
             if (window->escape_handler != NULL)