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About gcc : Change-the-name-of-gmonout-file-when-compiling-with–pg-duplicate

Question Detail

Is it possible to change the default name of the file gmon.out, which is created when the profile flag (-pg) is set when compiling with gcc, to, for example, [executable name].gmon.out?

I need this because I have more than one executables, which are located in the same directory, and have to run parallel.

Question Answer

Not so short, but actually the answer is YES – if using glibc (at least with version 2.11.1, which is the version I used to test this).

To have your -pg compiled and linked executable create different names then the default gmon.out, just set the environment variable GMON_OUT_PREFIX to a value of your choice and the profiling output will be written to [value of your choice].[pid] where [pid] is the process-ID of the process the profiling data belongs to.

In short, no. The profiling file created by running your program once it has been compiled with the -pg command is ALWAYS called gmon.out. However, once produced you can safely rename it to something else (for example foo.bar) and analyse it later using the command:

gprof test.exe foo.bar > analysis.txt

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