diff --git a/ap/libc/glibc/glibc-2.23/include/libc-internal.h b/ap/libc/glibc/glibc-2.23/include/libc-internal.h
new file mode 100644
index 0000000..7a185bb
--- /dev/null
+++ b/ap/libc/glibc/glibc-2.23/include/libc-internal.h
@@ -0,0 +1,114 @@
+/* This file contains a number of internal prototype declarations that
+   don't fit anywhere else.  */
+
+#ifndef _LIBC_INTERNAL
+# define _LIBC_INTERNAL 1
+
+#include <hp-timing.h>
+
+/* Initialize the `__libc_enable_secure' flag.  */
+extern void __libc_init_secure (void);
+
+/* This function will be called from _init in init-first.c.  */
+extern void __libc_global_ctors (void);
+
+/* Discover the tick frequency of the machine if something goes wrong,
+   we return 0, an impossible hertz.  */
+extern int __profile_frequency (void);
+libc_hidden_proto (__profile_frequency)
+
+/* Hooks for the instrumenting functions.  */
+extern void __cyg_profile_func_enter (void *this_fn, void *call_site);
+extern void __cyg_profile_func_exit (void *this_fn, void *call_site);
+
+/* Get frequency of the system processor.  */
+extern hp_timing_t __get_clockfreq (void);
+
+/* Free all allocated resources.  */
+extern void __libc_freeres (void);
+libc_hidden_proto (__libc_freeres)
+
+/* Free resources stored in thread-local variables on thread exit.  */
+extern void __libc_thread_freeres (void);
+
+/* Define and initialize `__progname' et. al.  */
+extern void __init_misc (int, char **, char **);
+
+# if IS_IN (rtld)
+extern __typeof (__profile_frequency) __profile_frequency attribute_hidden;
+# endif
+
+/* 1 if 'type' is a pointer type, 0 otherwise.  */
+# define __pointer_type(type) (__builtin_classify_type ((type) 0) == 5)
+
+/* __intptr_t if P is true, or T if P is false.  */
+# define __integer_if_pointer_type_sub(T, P) \
+  __typeof__ (*(0 ? (__typeof__ (0 ? (T *) 0 : (void *) (P))) 0 \
+		  : (__typeof__ (0 ? (__intptr_t *) 0 : (void *) (!(P)))) 0))
+
+/* __intptr_t if EXPR has a pointer type, or the type of EXPR otherwise.  */
+# define __integer_if_pointer_type(expr) \
+  __integer_if_pointer_type_sub(__typeof__ ((__typeof__ (expr)) 0), \
+				__pointer_type (__typeof__ (expr)))
+
+/* Cast an integer or a pointer VAL to integer with proper type.  */
+# define cast_to_integer(val) ((__integer_if_pointer_type (val)) (val))
+
+/* Align a value by rounding down to closest size.
+   e.g. Using size of 4096, we get this behavior:
+	{4095, 4096, 4097} = {0, 4096, 4096}.  */
+#define ALIGN_DOWN(base, size)	((base) & -((__typeof__ (base)) (size)))
+
+/* Align a value by rounding up to closest size.
+   e.g. Using size of 4096, we get this behavior:
+	{4095, 4096, 4097} = {4096, 4096, 8192}.
+
+  Note: The size argument has side effects (expanded multiple times).  */
+#define ALIGN_UP(base, size)	ALIGN_DOWN ((base) + (size) - 1, (size))
+
+/* Same as ALIGN_DOWN(), but automatically casts when base is a pointer.  */
+#define PTR_ALIGN_DOWN(base, size) \
+  ((__typeof__ (base)) ALIGN_DOWN ((uintptr_t) (base), (size)))
+
+/* Same as ALIGN_UP(), but automatically casts when base is a pointer.  */
+#define PTR_ALIGN_UP(base, size) \
+  ((__typeof__ (base)) ALIGN_UP ((uintptr_t) (base), (size)))
+
+/* Ignore the value of an expression when a cast to void does not
+   suffice (in particular, for a call to a function declared with
+   attribute warn_unused_result).  */
+#define ignore_value(x) \
+  ({ __typeof__ (x) __ignored_value = (x); (void) __ignored_value; })
+
+/* The macros to control diagnostics are structured like this, rather
+   than a single macro that both pushes and pops diagnostic state and
+   takes the affected code as an argument, because the GCC pragmas
+   work by disabling the diagnostic for a range of source locations
+   and do not work when all the pragmas and the affected code are in a
+   single macro expansion.  */
+
+/* Push diagnostic state.  */
+#define DIAG_PUSH_NEEDS_COMMENT _Pragma ("GCC diagnostic push")
+
+/* Pop diagnostic state.  */
+#define DIAG_POP_NEEDS_COMMENT _Pragma ("GCC diagnostic pop")
+
+#define _DIAG_STR1(s) #s
+#define _DIAG_STR(s) _DIAG_STR1(s)
+
+/* Ignore the diagnostic OPTION.  VERSION is the most recent GCC
+   version for which the diagnostic has been confirmed to appear in
+   the absence of the pragma (in the form MAJOR.MINOR for GCC 4.x,
+   just MAJOR for GCC 5 and later).  Uses of this pragma should be
+   reviewed when the GCC version given is no longer supported for
+   building glibc; the version number should always be on the same
+   source line as the macro name, so such uses can be found with grep.
+   Uses should come with a comment giving more details of the
+   diagnostic, and an architecture on which it is seen if possibly
+   optimization-related and not in architecture-specific code.  This
+   macro should only be used if the diagnostic seems hard to fix (for
+   example, optimization-related false positives).  */
+#define DIAG_IGNORE_NEEDS_COMMENT(version, option)	\
+  _Pragma (_DIAG_STR (GCC diagnostic ignored option))
+
+#endif /* _LIBC_INTERNAL  */