3 
–p and –pg
The –pand –pgoptions instruct the compiler to produce code that counts the number of times each routine is called. The profiling is based on a periodic sample taken by the system, rather than by line counters.
Using the -pOption
To generate an execution profile using the –poption:
1.Compile with the –poption.
2.Run a.out, which produces a mon.out executable file.
3.Type prof a.out. The program prints a profile.
Using the -pgOption
To generate an execution profile using the –pgoption:
1.Compile with the –pgoption.
2.Run a.out, which produces a gmon.out executable file, a more sophisticated profiling tool than mon.out.
3.Type gprof a.out. The program prints a profile.
–pic,-Kpic and –PIC,-KPIC
The -picand -PICoptions cause the compiler to generate position- independent code (PIC). One of these options should be used for objects which are then put into shared libraries. With PIC, each reference to a global datum is generated as a dereference of a pointer in the global offset table. Each function call is generated in pc-relative addressing mode through a procedure linkage table.
The size of the global offset table is limited to 8Kbytes with -pic. The -PICoption expands the global offset table to handle 32-bit addresses for those rare cases where there are too many data objects for -pic.
For more information on PIC, see the section on shared libraries in the Solaris documentation.
