/usr/include/math.h/usr/include/sys/un.h/usr/include/math.hTo use the Inline Math package you have to change your existing math.h. Please note, the way I include the new Header file, is different than suggested in inline-math's README.
Please add the following at the bottom of math.h, before the last #endif
#if defined(UseInlineMath)
/* Needed on ISC __CONCAT, PI */
#ifndef __CONCAT
/*
* The __CONCAT macro is used to concatenate parts of symbol names, e.g.
* with "#define OLD(foo) __CONCAT(old,foo)", OLD(foo) produces oldfoo.
* The __CONCAT macro is a bit tricky -- make sure you don't put spaces
* in between its arguments. __CONCAT can also concatenate double-quoted
* strings produced by the __STRING macro, but this only works with ANSI C.
*/
#if defined(__STDC__) || defined(__cplusplus)
#define __CONCAT(x,y) x ## y
#define __STRING(x) #x
#else /* !(__STDC__ || __cplusplus) */
#define __CONCAT(x,y) x/**/y
#define __STRING(x) "x"
#endif /* !(__STDC__ || __cplusplus) */
#endif
#ifndef PI
#define PI M_PI
#endif
#include "/usr/local/include/i386/__math.h"
#endif
/usr/include/math.h/usr/include/sys/un.h