[Linux][gprof and gcov]

[gprof] performance analysis

flag used: -pg

gcc -pg test.c
./a.out
gprof a.out > test

[gcov] code coverage

flag used: -ftest-coverage

gcc -ftest-coverage test.c
./a.out
gcov test.c

References:
http://blog.superd.org/index.php/2004/11/02/39/
http://codingfreak.blogspot.com/2009/02/gcov-analyzing-code-produced-with-gcc.html