(gprof.info.gz) Incompatibilities

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 8 Incompatibilities with Unix 'gprof'
 *************************************
 
 GNU 'gprof' and Berkeley Unix 'gprof' use the same data file 'gmon.out',
 and provide essentially the same information.  But there are a few
 differences.
 
    * GNU 'gprof' uses a new, generalized file format with support for
      basic-block execution counts and non-realtime histograms.  A magic
      cookie and version number allows 'gprof' to easily identify new
      style files.  Old BSD-style files can still be read.  
      Profiling Data File Format File Format.
 
    * For a recursive function, Unix 'gprof' lists the function as a
      parent and as a child, with a 'calls' field that lists the number
      of recursive calls.  GNU 'gprof' omits these lines and puts the
      number of recursive calls in the primary line.
 
    * When a function is suppressed from the call graph with '-e', GNU
      'gprof' still lists it as a subroutine of functions that call it.
 
    * GNU 'gprof' accepts the '-k' with its argument in the form
      'from/to', instead of 'from to'.
 
    * In the annotated source listing, if there are multiple basic blocks
      on the same line, GNU 'gprof' prints all of their counts, separated
      by commas.
 
    * The blurbs, field widths, and output formats are different.  GNU
      'gprof' prints blurbs after the tables, so that you can see the
      tables without skipping the blurbs.
 

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