c - ctime and time warnings compiling on OSX -


i getting warnings when compiling c program on osx 10.6.5, seem quite critical.

extras.c:15: warning: implicit declaration of function ‘time’ extras.c: in function ‘outlog’: extras.c:363: warning: implicit declaration of function ‘ctime’

the corresponding lines follows:

lines 13-15:

randnumgen = gsl_rng_alloc(gsl_rng_taus); long t1; (void) time(&t1);

lines 360-363:

if (log==null) { log=stdout;}  tval = time(null); char* timestring = ctime(&tval);

i believe program written linux, wonder if there difference between time , ctime on 2 platforms?

verify c files contains:

#include <time.h>

somewhere around top.

also,

long t1; time(t1);

is pretty lousy code, argument time() has type time_t*, should read

time_t t1; time(&t1);

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