Add a "fork" of musl as //fusl.

fusl/include/values.h

+#ifndef _VALUES_H
+#define _VALUES_H
+
+#include <limits.h>
+
+#define CHARBITS   (sizeof(char)   * 8)
+#define SHORTBITS  (sizeof(short)  * 8)
+#define INTBITS    (sizeof(int)    * 8)
+#define LONGBITS   (sizeof(long)   * 8)
+#define PTRBITS    (sizeof(char *) * 8)
+#define DOUBLEBITS (sizeof(double) * 8)
+#define FLOATBITS  (sizeof(float)  * 8)
+
+#define MINSHORT SHRT_MIN
+#define MININT   INT_MIN
+#define MINLONG  LONG_MIN
+
+#define MAXSHORT SHRT_MAX
+#define MAXINT   INT_MAX
+#define MAXLONG  LONG_MAX
+
+#define HIBITS   MINSHORT
+#define HIBITL   MINLONG
+
+#include <float.h>
+
+#define MAXDOUBLE DBL_MAX
+#undef  MAXFLOAT
+#define MAXFLOAT  FLT_MAX
+#define MINDOUBLE DBL_MIN
+#define MINFLOAT  FLT_MIN
+#define DMINEXP   DBL_MIN_EXP
+#define FMINEXP   FLT_MIN_EXP
+#define DMAXEXP   DBL_MAX_EXP
+#define FMAXEXP   FLT_MAX_EXP
+
+#define BITSPERBYTE CHAR_BIT
+
+#endif