do_gettimeofday() - undefined reference

[anu4]

do_gettimeofday() - undefined reference
Hello:

I am new to linux and facing a simple compile problem. I have written a C file which is using the do_gettimeofday() function.

#include <linux/time.h>
#include <stdio.h>

main()
{
struct timeval start;

do_gettimeofday(&start);
printf ("%d", start.tv_usec);
}

gcc a1.c --
undefined reference to `do_gettimeofday'


here is the PATH:

echo $PATH
/usr/lib/qt-3.3/bin:/usr/kerberos/bin:/usr/lib/ccache:/usr/local/bin:/bin:/usr/bin:/usr/local/sbin:/usr/sbin:/sbin:/homes/iws/arpalla/bin

I checked that the /usr/include/linux/time.h file got the function declaration for do_gettimeofday()

Is there anything missing in the PATH variable?

I am facing same error for rdtscl() function as well!!

The Linux version is :

[arpalla]$ uname -a
Linux <..> 2.6.30-2.0 #6 SMP Mon Sep 21 11:03:44 PDT 2009 i686 i686 i386 GNU/Linux

[arpalla]$ uname -r
2.6.30-2cse.0

cat /etc/*release*
Fedora release 11 (Leonidas)
Fedora release 11 (Leonidas)
Fedora release 11 (Leonidas)
cpe:/o:fedoraproject:fedora:11

Can anyone please help?

Thanks,
Anu

PS - I have posted this earlier in redhat/fedora forum - but I figured out that this should be the apt forum - I will try to delete the thread there.. sorry for duplicating..

[hazel]

Try including the library with an -l (lower-case L) flag, the library location with an -L flag and the header location with an -I (upper-case i) flag in your compilation statement (see the man page for gcc for more details about these flags). I think the time library is not on the default path for the loader.