Compiler rejecting sinf

[AngusH]

I'm trying to compile the following code just to get a feel for exactly how sinf works, as I need to use it in another piece of code, but the compiler keeps saying it's undefined. Is sinf not defined in math.h?
Program:
#include "math.h"
#include "stdio.h"

int main()
{
int h;
float v;
v=3.0;
printf("%f",sinf(v));

return 0;
}

Compiler errors:
spc1.c: In function ‘main’:
spc1.c:6:6: warning: unused variable ‘h’
/tmp/cc48qBlB.o: In function `main':
spc1.c:(.text+0x1a): undefined reference to `sinf'
collect2: ld returned 1 exit status


Thanks in advance everyone.
Angus

[NovaAesa]

sinf certainly is included in math.h

Have a look at the man page (you might have to install them, they aren't installed by default).

man sinf
It says in the man page that you have to link with -lm. So you have to compile with something like:


gcc -lm -Wall spcl.c

[AngusH]

Thanks, it's weird because I swear I've used hypot before without using -lm and it's man page says it requires it too...
Ah well, thanks again for your time.
Angus