how to generate control flow graph of a c program by gcc 3.4.5?

Question

I type the following command in the command line in order to generate control flow graph for a c program by gcc 3.4.5 but I couldn't find the result files. In addition, how do I see the control flow graph garphicallyy? Thanks

score 0 · Answer 1 · edited May 23 '17 at 12:13

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Use gcc -fdump-tree-cfg <Source.c> for the control flow graph.

Refer the link for GUI. Geting Control Flow Graph from ANSI C code

edited May 23 '17 at 12:13

Community

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answered Dec 15 '15 at 10:18

Kulwant Singh

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score 0 · Answer 2 · answered Aug 19 '10 at 09:00

You forgot to include your command-line... I assume -fprofile-arcs. The output file location is described in the gcc manpage:

    ... Each object file's auxname is
    generated from the name of the output file, if explicitly speci-
    fied and it is not the final executable, otherwise it is the base-
    name of the source file. In both cases any suffix is removed (e.g.
    foo.gcda for input file dir/foo.c, or dir/foo.gcda for output file
    specified as -o dir/foo.o).

So, output is written alongside the object files - in their directories. If you compile source directly to an executable, you'll find the profiling output in the directory the compiler wrote the executable to.

how to generate control flow graph of a c program by gcc 3.4.5?

2 Answers2