GCC: Print used functions during program/library run

Question

Is it possible to print a list of all functions used during a program run? The program and the library used by the program is compiled with GCC without optimization.

The reason for this list is that I'd like to optimize a library which has a lot of unused functions (the library is really huge and I need only a few functions).

dimba · Accepted Answer · 2011-09-05 19:11:43Z

3

If you can compile them again you could use a profiler such as gprof or valgrind (with its callgrind tool). I think you wouldn't need a new compiling if you use valgrind.

edited Sep 5, 2011 at 19:11

dimba

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answered Sep 5, 2011 at 19:01

lafdez

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dimba · Accepted Answer · 2011-09-06 19:30:51Z

1

If its dynamic library (*.so) try ltrace. For example to see how ls uses libc:

ltrace --library /lib64/libc.so.6 ls

gprof can be an option too.

edited Sep 6, 2011 at 19:30

answered Sep 5, 2011 at 19:09

dimba

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osgx · Accepted Answer · 2011-09-06 19:44:08Z

0

gcov (compile with gcc -ftest-coverage -fprofile-arcs) will say this too.

answered Sep 6, 2011 at 19:44

osgx

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