[ale] Missing "floor"?

[leam hall]

Not sure why I'm getting:

gcc -Wall -Werror -o rand rand.c
/tmp/ccAJ7e8S.o: In function `main':
rand.c:(.text+0x16): undefined reference to `floor'
collect2: ld returned 1 exit status

###
rand.c
###

#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <math.h>

int main(void) {

    int num;
    float val = 2.3;
    num = floor(val);
    printf("num is %d.\n", num);

    return 0;
}

-- 
Mind on a Mission <http://leamhall.blogspot.com/>
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