gprof: gmon.out file is missing call-graph data (-pg)

[zoharl3]

I have this problem with gprof:

test.c:
-------

#include <stdio.h>

int main()
{
printf("hello world\n");

return 0;
};



makefile:
-----------
test: test.c
cc -g -c test.c -pg
cc -o test test.o -pg


when I run test it generates the gmon.out, but gprof complains:

gprof: gmon.out file is missing call-graph data

could you recommend me of another profiler?

Thanks

[zoharl3]

Guys,

Am I missing something here? Are profilers not in use? Do you have an idea where I can ask about it, because I have no one to ask at GNU.

Thanks

[bmenrigh]

gprof profiles functions -- you don't have any (main doesn't count). Add a function that does the print and then profile your code, gmon.out will then have a call-graph.

[zoharl3]

Thanks!