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

fusl/arch/i386/bits/alltypes.h.in

+#define _Addr int
+#define _Int64 long long
+#define _Reg int
+
+#if __GNUC__ >= 3
+TYPEDEF __builtin_va_list va_list;
+TYPEDEF __builtin_va_list __isoc_va_list;
+#else
+TYPEDEF struct __va_list * va_list;
+TYPEDEF struct __va_list * __isoc_va_list;
+#endif
+
+#ifndef __cplusplus
+#ifdef __WCHAR_TYPE__
+TYPEDEF __WCHAR_TYPE__ wchar_t;
+#else
+TYPEDEF long wchar_t;
+#endif
+#endif
+
+#if defined(__FLT_EVAL_METHOD__) && __FLT_EVAL_METHOD__ == 0
+TYPEDEF float float_t;
+TYPEDEF double double_t;
+#else
+TYPEDEF long double float_t;
+TYPEDEF long double double_t;
+#endif
+
+#if !defined(__cplusplus)
+TYPEDEF struct { _Alignas(8) long long __ll; long double __ld; } max_align_t;
+#elif defined(__GNUC__)
+TYPEDEF struct { __attribute__((__aligned__(8))) long long __ll; long double __ld; } max_align_t;
+#else
+TYPEDEF struct { alignas(8) long long __ll; long double __ld; } max_align_t;
+#endif
+
+TYPEDEF long time_t;
+TYPEDEF long suseconds_t;
+
+TYPEDEF struct { union { int __i[9]; volatile int __vi[9]; unsigned __s[9]; } __u; } pthread_attr_t;
+TYPEDEF struct { union { int __i[6]; volatile int __vi[6]; volatile void *volatile __p[6]; } __u; } pthread_mutex_t;
+TYPEDEF struct { union { int __i[6]; volatile int __vi[6]; volatile void *volatile __p[6]; } __u; } mtx_t;
+TYPEDEF struct { union { int __i[12]; volatile int __vi[12]; void *__p[12]; } __u; } pthread_cond_t;
+TYPEDEF struct { union { int __i[12]; volatile int __vi[12]; void *__p[12]; } __u; } cnd_t;
+TYPEDEF struct { union { int __i[8]; volatile int __vi[8]; void *__p[8]; } __u; } pthread_rwlock_t;
+TYPEDEF struct { union { int __i[5]; volatile int __vi[5]; void *__p[5]; } __u; } pthread_barrier_t;