Question

I am trying to use trace() in flash builder 4 – but it doesn’t work!

I am running in “debug”, also I added to the flex compiler options the “-debug=true” option.
What am I doing wrong ???

Answer 1

In flex 4, a new compiler option is added.

-compiler.omit-trace-statements

the default value is set to true.
this mode omits trace statements for -debug=false mode and enable trace for -debug=true mode automatically.

BUT there is a bug in fcsh.

If you compile the swf with -debug=true after once compiled it for -debug=true mode,
trace statements are still omitted.

If you reboot fcsh, the trace is enabled.

To avoid this, you can disable omit-trace-statements by setting flex-config.

Test.as

package {
    import flash.display.Sprite;

    public class Test extends Sprite {
        public function Test() {
            trace("trace omitted?!");
        }
    }
}

Test-config.xml

<flex-config>
  <compiler>
    <debug>false</debug>
    <omit-trace-statements>true</omit-trace-statements>
  </compiler>
</flex-config>