from time.h:

/* This defines CLOCKS_PER_SEC, which is the number of processor clock
   ticks per second.  */
# include <bits/time.h>

/* This is the obsolete POSIX.1-1988 name for the same constant.  */
# if !defined __STRICT_ANSI__ && !defined __USE_XOPEN2K
#  ifndef CLK_TCK
#   define CLK_TCK	CLOCKS_PER_SEC
#  endif
# endif


 examples/grab_partial_image.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Index: libdc1394-1.2.1/examples/grab_partial_image.c
===================================================================
--- libdc1394-1.2.1.orig/examples/grab_partial_image.c
+++ libdc1394-1.2.1/examples/grab_partial_image.c
@@ -218,7 +218,7 @@ int main(int argc, char *argv[]) 
     /*---------------------------------------------------------------------
      *  output elapsed time
      *---------------------------------------------------------------------*/
-    elapsed_time = (float)(times(&tms_buf) - start_time) / CLK_TCK;
+    elapsed_time = (float)(times(&tms_buf) - start_time) / CLOCKS_PER_SEC;
     printf( "got frame %d. elapsed time: %g sec ==> %g frames/second\n",
             i, elapsed_time, (float)i / elapsed_time);
   }