diff -u -r /home/fornwall/lib/android-ndk/sysroot/usr/include/bits/struct_file.h ./usr/include/bits/struct_file.h
--- /home/fornwall/lib/android-ndk/sysroot/usr/include/bits/struct_file.h	2017-06-20 17:41:56.000000000 +0200
+++ ./usr/include/bits/struct_file.h	2017-06-26 13:35:19.040117023 +0200
@@ -33,13 +33,74 @@
 
 __BEGIN_DECLS
 
+#if defined(__LP64__)
+struct __sbuf {
+	unsigned char* _base;
+	size_t _size;
+};
+#else
+struct __sbuf {
+	unsigned char *_base;
+	int	_size;
+};
+#endif
+
 struct __sFILE {
+	unsigned char *_p;	/* current position in (some) buffer */
+	int	_r;		/* read space left for getc() */
+	int	_w;		/* write space left for putc() */
 #if defined(__LP64__)
-  char __private[152];
+	int	_flags;		/* flags, below; this FILE is free if 0 */
+	int	_file;		/* fileno, if Unix descriptor, else -1 */
 #else
-  char __private[84];
+	short	_flags;		/* flags, below; this FILE is free if 0 */
+	short	_file;		/* fileno, if Unix descriptor, else -1 */
 #endif
-} __attribute__((aligned(sizeof(void*))));
+	struct	__sbuf _bf;	/* the buffer (at least 1 byte, if !NULL) */
+	int	_lbfsize;	/* 0 or -_bf._size, for inline putc */
+
+	/* operations */
+	void	*_cookie;	/* cookie passed to io functions */
+	int	(*_close)(void *);
+	int	(*_read)(void *, char *, int);
+	off_t	(*_seek)(void *, off_t, int);
+	int	(*_write)(void *, const char *, int);
+
+	/* extension data, to avoid further ABI breakage */
+	struct	__sbuf _ext;
+	/* data for long sequences of ungetc() */
+	unsigned char *_up;	/* saved _p when _p is doing ungetc data */
+	int	_ur;		/* saved _r when _r is counting ungetc data */
+
+	/* tricks to meet minimum requirements even when malloc() fails */
+	unsigned char _ubuf[3];	/* guarantee an ungetc() buffer */
+	unsigned char _nbuf[1];	/* guarantee a getc() buffer */
+
+	/* separate buffer for fgetln() when line crosses buffer boundary */
+	struct	__sbuf _lb;	/* buffer for fgetln() */
+
+	/* Unix stdio files get aligned to block boundaries on fseek() */
+	int	_blksize;	/* stat.st_blksize (may be != _bf._size) */
+	off_t	_offset;	/* current lseek offset */
+};
+
+#define	__SLBF	0x0001		/* line buffered */
+#define	__SNBF	0x0002		/* unbuffered */
+#define	__SRD	0x0004		/* OK to read */
+#define	__SWR	0x0008		/* OK to write */
+	/* RD and WR are never simultaneously asserted */
+#define	__SRW	0x0010		/* open for reading & writing */
+#define	__SEOF	0x0020		/* found EOF */
+#define	__SERR	0x0040		/* found error */
+#define	__SMBF	0x0080		/* _buf is from malloc */
+#define	__SAPP	0x0100		/* fdopen()ed in append mode */
+#define	__SSTR	0x0200		/* this is an sprintf/snprintf string */
+#define	__SOPT	0x0400		/* do fseek() optimization */
+#define	__SNPT	0x0800		/* do not do fseek() optimization */
+#define	__SOFF	0x1000		/* set iff _offset is in fact correct */
+#define	__SMOD	0x2000		/* true => fgetln modified _p text */
+#define	__SALC	0x4000		/* allocate string space dynamically */
+#define	__SIGN	0x8000		/* ignore this file in _fwalk */
 
 __END_DECLS