cos() in math.h ?

[Christophe TROESTLER]

Hi all,

According to the man page, if I want to use `cos' in a program, I
simply need to include `math.h'.  However, when I compile, I got the
error:

        /tmp/cc9WOsLC.o(.text+0x16): undefined reference to `cos'
        collect2: ld returned 1 exit status

I got the necessary packages to compile (e.g., libc6-dev).  Any idea
what is the cause ?

ChriS