Squash commits for public release

libs/libc/include/stddef.h

@@ -0,0 +1,43 @@
+#ifndef _LIBC_STDDEF_H
+#define _LIBC_STDDEF_H
+
+#include <sys/cdefs.h>
+#include <sys/types.h>
+
+__BEGIN_DECLS
+
+#ifdef __i386__
+#if defined(__clang__)
+typedef unsigned int size_t;
+typedef int ssize_t;
+typedef int ptrdiff_t;
+#elif defined(__GNUC__) || defined(__GNUG__)
+typedef unsigned long size_t;
+typedef long ssize_t;
+typedef long ptrdiff_t;
+#endif
+#elif __x86_64__
+typedef unsigned long size_t;
+typedef long long ssize_t;
+typedef long long ptrdiff_t;
+#elif __arm__
+typedef unsigned int size_t;
+typedef int ssize_t;
+typedef int ptrdiff_t;
+#elif __aarch64__
+typedef unsigned long size_t;
+typedef long long ssize_t;
+typedef long long ptrdiff_t;
+#elif defined(__riscv) && (__riscv_xlen == 64)
+typedef unsigned long size_t;
+typedef long long ssize_t;
+typedef long long ptrdiff_t;
+#endif
+
+#define NULL ((void*)0)
+
+#define offsetof(type, member) __builtin_offsetof(type, member)
+
+__END_DECLS
+
+#endif // _LIBC_STDDEF_H