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re: no call-graph produced when C++ program compiled with -pg option
- From: Dan Kegel <dank at kegel dot com>
- To: david dot a dot vaughn at baesystems dot com, GCC Mailing List <gcc at gcc dot gnu dot org>
- Date: Wed, 13 Aug 2003 11:28:15 -0700
- Subject: re: no call-graph produced when C++ program compiled with -pg option
I am trying to speed up an application. It was suggested that I use the -pg
option and take the gmon.out result and use gprof to look at it. This worked
well when I tested it with a simple c program. I added -pg to all the
makefiles and make.inc of the large application and rebuilt it. I get a
gmon.out when I run it, but I get an error that there is no call-graph in
the file (gprof -i shows 1 histogram, 0 call-graph & 0 basic-block records).
The output is quite large (gmon.out >1Mbyte could there be a limit?). Any
help would be great.
Which version of gcc? Which version of glibc? Is it multi-threaded?
See http://www.kegel.com/gprof.html for notes on a couple gotchas.