ptrace for gnu c (ansi c) programs?

[heiser at tdw201.ed.ray.com]

On my Sysvr3 (Esix) system, there is a program called 'ctrace', that 
 helps in the debugging of C programs by generating a "chock full of
debug messages" version of my program.  This program won't, however,
work on code with ANSI C "features", such as those I write for GCC.

Is there something comparable to ctrace available to support ANSI
C (or GCC)?

Thanks in advance,
Bill

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