How to view symbols in object files?

Question

How can I view symbols in a .o file? nm does not work for me. I use g++/linux.

Answer 1

You can use nm -C .o/lib/exe, for example:

xiongyu@ubuntu:~/tmp/build$ nm -C libfile1.a 

file1.cpp.o:
0000000000000000 T f()
0000000000000000 W int fun(int)

using nm -C it will be more readable, if you just use nm:

xiongyu@ubuntu:~/tmp/build$ nm libfile1.a 

file1.cpp.o:
0000000000000000 T _Z1fv
0000000000000000 W _Z3funIiET_S0_

as we see it's not so readable.

Below is what my file1.cpp like:

xiongyu@ubuntu:~/tmp/build$ vi ../file1.cpp 
#include "head.h"
void f()  {
     int i = fun(42);
}