gcc: undefined reference to _mcount (gprof instrumentation)

Question

When compiling my c++ sources with the -pg option to inject gprof profile instrumentation code the compile fails with the undefined reference to _mcount error.

Without this option everything compiles (and runs) fine. What is wrong in my case? (Solaris 10 SPARC Platform)

score 27 · Accepted Answer · answered Jan 05 '11 at 11:04

27

Are you both compiling each object file and linking the final executable using the '-pg' flag?

answered Jan 05 '11 at 11:04

trojanfoe

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How can I make sure I'm linking the final executable using the '-pg' flag? – Atheel Massalha Jul 06 '21 at 13:01
@AtheelMassalha That depends what build system you are using. You should start a new question. – trojanfoe Jul 06 '21 at 13:05

gcc: undefined reference to _mcount (gprof instrumentation)

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