Miscellaneous Options

-d[num]
--debug[=num]: The ‘-d num’ option specifies debugging options. If num is not specified, enable all debugging. See Debugging gprof.
-h
--help: The ‘-h’ option prints command line usage.
-Oname
--file-format=name: Selects the format of the profile data files. Recognized formats are ‘auto’ (the default), ‘bsd’, ‘4.4bsd’, ‘magic’, and ‘prof’ (not yet supported).
-s
--sum: The ‘-s’ option causes gprof to summarize the information in the profile data files it read in, and write out a profile data file called gmon.sum, which contains all the information from the profile data files that gprof read in. The file gmon.sum may be one of the specified input files; the effect of this is to merge the data in the other input files into gmon.sum.
Eventually you can run gprof again without ‘-s’ to analyze the cumulative data in the file gmon.sum.
-v
--version: The ‘-v’ flag causes gprof to print the current version number, and then exit.