Entering the Debugger ¶

Contents

Entering the Debugger

Invoking the Debugger Initially ¶

The simplest way to debug your program is to run remake -X or remake –debugger.

Example Debugger Sessions ¶

In this example we’ll use the Makefile from libcdio-paranoia

$  remake --debugger
...
Reading makefiles...
Updating makefiles....

-> (/tmp/remake/Makefile:1505)
Makefile: Makefile.in config.status
remake<0>

To be continued…

Calling the debugger within the Makefile ¶

Sometimes it is not feasible to invoke the program from the debugger. Although the debugger tries to set things up to make it look like your program is called, sometimes the differences matter. Also the debugger adds overhead and slows down your program.

Another possibility then is to a function call into your Makefile to call the debugger at the spot you want to stop at.

Here is an Example:

foo: bar

debug:
      $(debugger "debug target break")

bar:
      $(debugger "first bar command")
      @echo hi

baz: debug
      @echo hello again

$ remake -f /tmp/foo.Makefile
debugger() function caled with parameter "bar called"
break
:o (/tmp/foo.Makefile:3)
bar
remake<0> where
=>#0  bar at /tmp/foo.Makefile:6
  #1  foo at /tmp/foo.Makefile:1
remake<0> quit
remake: That's all, folks...

$ remake -f /tmp/foo.Makefile baz
debugger() function caled with parameter "debug target break"
break
:o (/src/external-vcs/github/rocky/remake/tmp/debugger.Makefile:3)
debug
remake<0> where
=>#0  debug at /tmp/foo.Makefile:3
  #1  baz at /tmp/foo.Makefile:10
remake<0>