On 06/17/2013 12:19 PM, J.B.W.Webber wrote:
Hi, I am trying to find in which function call the most time is being spent.
I am using gcc and trying to compile and link with -g and -pg.
i.e. for a trivial test :
$ cat helloworld.c
/* Hello World program */
#include<stdio.h>
main()
{
printf("Hello World\n");
}
$ gcc -g -pg -c helloworld.c
$ gcc -pg helloworld.o
helloworld.o: In function `main':
helloworld.c:6: undefined reference to `_mcount'
collect2: ld returned 1 exit status
Any ideas ? Am I missing a .h call ? Or do I need to link to something ?
I have just updated cygwin. I attach cygcheck.out
Or any suggestions for another profiling tool that actually reports times ?
Cheers,
Beau
If the gprof section of binutils is properly built and installed, it
should satisfy the mcount reference.
It's a bit strange to make a .o with -g -pg together, particularly when
you don't link with the same options.
FWIW, latest version of Intel VTune works with cygwin builds with -g3
-gdwarf-2 (and of course PATH considerations).
--
Tim Prince
--
Problem reports: http://cygwin.com/problems.html
FAQ: http://cygwin.com/faq/
Documentation: http://cygwin.com/docs.html
Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
