🚀 go-pugleaf

I am having trouble compiling the following small ANSI compliant program:

/* start of program */
#include <sys/socket.h>
struct sockaddr_in sin;
/* end of program */

The problem is that I get the following error message:

sin.c:3: built-in function `sin' declared as non-function
sin.c:3: storage size of `sin' isn't known

Doing gcc -v gives:

Reading specs from /usr/lib/gcc-lib/i386-linux/2.3.3/specs
gcc version 2.3.3

It appears that GCC wants to provide an inline 387 coprocessor instruction
for the sin function.  However, I have not included <math.h>, nor have I
indicated that sin is a function in any way.  According to the ANSI
standard, I should be able to replace a library object with something
of my own choosing.

gcc -ansi -pedantic doesn't seem to help things.

Is there a solution to this problem?

Mail only please; I do not usually read this newsgroup.
Any help is appreciated.