diff --git a/build-package.sh b/build-package.sh
index 5cd4fdc3c..161f3066d 100755
--- a/build-package.sh
+++ b/build-package.sh
@@ -254,8 +254,8 @@ termux_step_setup_variables() {
 	: "${TERMUX_ANDROID_HOME:="/data/data/com.termux/files/home"}"
 	: "${TERMUX_DEBUG:=""}"
 	: "${TERMUX_PKG_API_LEVEL:="21"}"
-	: "${TERMUX_ANDROID_BUILD_TOOLS_VERSION:="26.0.1"}"
-	: "${TERMUX_NDK_VERSION:="15.2"}"
+	: "${TERMUX_ANDROID_BUILD_TOOLS_VERSION:="27.0.1"}"
+	: "${TERMUX_NDK_VERSION:="16"}"
 
 	if [ "x86_64" = "$TERMUX_ARCH" ] || [ "aarch64" = "$TERMUX_ARCH" ]; then
 		TERMUX_ARCH_BITS=64
@@ -364,7 +364,7 @@ termux_step_start_build() {
 	TERMUX_STANDALONE_TOOLCHAIN="$TERMUX_TOPDIR/_lib/${TERMUX_NDK_VERSION}-${TERMUX_ARCH}-${TERMUX_PKG_API_LEVEL}"
 	# Bump the below version if a change is made in toolchain setup to ensure
 	# that everyone gets an updated toolchain:
-	TERMUX_STANDALONE_TOOLCHAIN+="-v14"
+	TERMUX_STANDALONE_TOOLCHAIN+="-v1"
 
 	if [ -n "${TERMUX_PKG_BLACKLISTED_ARCHES:=""}" ] && [ "$TERMUX_PKG_BLACKLISTED_ARCHES" != "${TERMUX_PKG_BLACKLISTED_ARCHES/$TERMUX_ARCH/}" ]; then
 		echo "Skipping building $TERMUX_PKG_NAME for arch $TERMUX_ARCH"
@@ -668,8 +668,10 @@ termux_step_setup_toolchain() {
 		cp "$TERMUX_SCRIPTDIR"/ndk-patches/{elf.h,sysexits.h,ifaddrs.h,libintl.h} usr/include
 
 		# Remove <sys/shm.h> from the NDK in favour of that from the libandroid-shmem.
-		# Also remove <sys/sem.h> as it doesn't work for non-root.
-		rm usr/include/sys/{shm.h,sem.h}
+		# Remove <sys/sem.h> as it doesn't work for non-root.
+		# Remove <iconv.h> as we currently provide it from libandroid-support.
+		# Remove <glob.h> as we currently provide it from libandroid-glob.
+		rm usr/include/sys/{shm.h,sem.h} usr/include/{iconv.h,glob.h}
 
 		sed -i "s/define __ANDROID_API__ __ANDROID_API_FUTURE__/define __ANDROID_API__ $TERMUX_PKG_API_LEVEL/" \
 			usr/include/android/api-level.h
diff --git a/ndk-patches/arpa-ftp.patch b/ndk-patches/arpa-ftp.patch
deleted file mode 100644
index d6a673c05..000000000
--- a/ndk-patches/arpa-ftp.patch
+++ /dev/null
@@ -1,111 +0,0 @@
-Add <arpa/ftp.h> for some ftp defines which some packages needs.
-
-diff -Nur /Users/fornwall/lib/android-ndk/platforms/android-18/arch-arm/usr/include/arpa/ftp.h ./usr/include/arpa/ftp.h
---- /Users/fornwall/lib/android-ndk/platforms/android-18/arch-arm/usr/include/arpa/ftp.h	1970-01-01 01:00:00.000000000 +0100
-+++ ./usr/include/arpa/ftp.h	2014-02-07 02:07:52.000000000 +0100
-@@ -0,0 +1,105 @@
-+/*
-+ * Copyright (c) 1983, 1989, 1993
-+ *	The Regents of the University of California.  All rights reserved.
-+ *
-+ * Redistribution and use in source and binary forms, with or without
-+ * modification, are permitted provided that the following conditions
-+ * are met:
-+ * 1. Redistributions of source code must retain the above copyright
-+ *    notice, this list of conditions and the following disclaimer.
-+ * 2. Redistributions in binary form must reproduce the above copyright
-+ *    notice, this list of conditions and the following disclaimer in the
-+ *    documentation and/or other materials provided with the distribution.
-+ * 4. Neither the name of the University nor the names of its contributors
-+ *    may be used to endorse or promote products derived from this software
-+ *    without specific prior written permission.
-+ *
-+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
-+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
-+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
-+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
-+ * SUCH DAMAGE.
-+ *
-+ *	@(#)ftp.h	8.1 (Berkeley) 6/2/93
-+ */
-+
-+#ifndef _ARPA_FTP_H
-+#define	_ARPA_FTP_H 1
-+
-+/* Definitions for FTP; see RFC-765. */
-+
-+/*
-+ * Reply codes.
-+ */
-+#define PRELIM		1	/* positive preliminary */
-+#define COMPLETE	2	/* positive completion */
-+#define CONTINUE	3	/* positive intermediate */
-+#define TRANSIENT	4	/* transient negative completion */
-+#define ERROR		5	/* permanent negative completion */
-+
-+/*
-+ * Type codes
-+ */
-+#define	TYPE_A		1	/* ASCII */
-+#define	TYPE_E		2	/* EBCDIC */
-+#define	TYPE_I		3	/* image */
-+#define	TYPE_L		4	/* local byte size */
-+
-+#ifdef FTP_NAMES
-+char *typenames[] =  {"0", "ASCII", "EBCDIC", "Image", "Local" };
-+#endif
-+
-+/*
-+ * Form codes
-+ */
-+#define	FORM_N		1	/* non-print */
-+#define	FORM_T		2	/* telnet format effectors */
-+#define	FORM_C		3	/* carriage control (ASA) */
-+#ifdef FTP_NAMES
-+char *formnames[] =  {"0", "Nonprint", "Telnet", "Carriage-control" };
-+#endif
-+
-+/*
-+ * Structure codes
-+ */
-+#define	STRU_F		1	/* file (no record structure) */
-+#define	STRU_R		2	/* record structure */
-+#define	STRU_P		3	/* page structure */
-+#ifdef FTP_NAMES
-+char *strunames[] =  {"0", "File", "Record", "Page" };
-+#endif
-+
-+/*
-+ * Mode types
-+ */
-+#define	MODE_S		1	/* stream */
-+#define	MODE_B		2	/* block */
-+#define	MODE_C		3	/* compressed */
-+#ifdef FTP_NAMES
-+char *modenames[] =  {"0", "Stream", "Block", "Compressed" };
-+#endif
-+
-+/*
-+ * Record Tokens
-+ */
-+#define	REC_ESC		'\377'	/* Record-mode Escape */
-+#define	REC_EOR		'\001'	/* Record-mode End-of-Record */
-+#define REC_EOF		'\002'	/* Record-mode End-of-File */
-+
-+/*
-+ * Block Header
-+ */
-+#define	BLK_EOR		0x80	/* Block is End-of-Record */
-+#define	BLK_EOF		0x40	/* Block is End-of-File */
-+#define BLK_ERRORS	0x20	/* Block is suspected of containing errors */
-+#define	BLK_RESTART	0x10	/* Block is Restart Marker */
-+
-+#define	BLK_BYTECOUNT	2	/* Bytes in this block */
-+
-+#endif /* arpa/ftp.h */
diff --git a/ndk-patches/arpa-tftp.patch b/ndk-patches/arpa-tftp.patch
deleted file mode 100644
index a7ec89078..000000000
--- a/ndk-patches/arpa-tftp.patch
+++ /dev/null
@@ -1,88 +0,0 @@
-The <arpa/tftp.h> header is needed by inetutils.
-
-diff -N -a -u -r /home/fornwall/lib/android-ndk/platforms/android-21/arch-arm/usr/include/arpa/tftp.h ./usr/include/arpa/tftp.h
---- /home/fornwall/lib/android-ndk/platforms/android-21/arch-arm/usr/include/arpa/tftp.h	1969-12-31 19:00:00.000000000 -0500
-+++ ./usr/include/arpa/tftp.h	2015-05-12 15:40:31.648145474 -0400
-@@ -0,0 +1,82 @@
-+/*
-+ * Copyright (c) 1983, 1993
-+ *	The Regents of the University of California.  All rights reserved.
-+ *
-+ * Redistribution and use in source and binary forms, with or without
-+ * modification, are permitted provided that the following conditions
-+ * are met:
-+ * 1. Redistributions of source code must retain the above copyright
-+ *    notice, this list of conditions and the following disclaimer.
-+ * 2. Redistributions in binary form must reproduce the above copyright
-+ *    notice, this list of conditions and the following disclaimer in the
-+ *    documentation and/or other materials provided with the distribution.
-+ * 4. Neither the name of the University nor the names of its contributors
-+ *    may be used to endorse or promote products derived from this software
-+ *    without specific prior written permission.
-+ *
-+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
-+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
-+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
-+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
-+ * SUCH DAMAGE.
-+ *
-+ *	@(#)tftp.h	8.1 (Berkeley) 6/2/93
-+ */
-+
-+#ifndef _ARPA_TFTP_H
-+#define	_ARPA_TFTP_H 1
-+
-+/*
-+ * Trivial File Transfer Protocol (IEN-133)
-+ */
-+#define	SEGSIZE		512		/* data segment size */
-+
-+/*
-+ * Packet types.
-+ */
-+#define	RRQ	01				/* read request */
-+#define	WRQ	02				/* write request */
-+#define	DATA	03				/* data packet */
-+#define	ACK	04				/* acknowledgement */
-+#define	ERROR	05				/* error code */
-+
-+struct	tftphdr {
-+	short	th_opcode;			/* packet type */
-+	union {
-+		char	tu_padding[3];		/* sizeof() compat */
-+		struct {
-+			union {
-+				unsigned short	tu_block;	/* block # */
-+				short	tu_code;		/* error code */
-+			} __attribute__ ((__packed__)) th_u3;
-+			char tu_data[0];	/* data or error string */
-+		} __attribute__ ((__packed__)) th_u2;
-+		char	tu_stuff[0];		/* request packet stuff */
-+	} __attribute__ ((__packed__)) th_u1;
-+} __attribute__ ((__packed__));
-+
-+#define	th_block	th_u1.th_u2.th_u3.tu_block
-+#define	th_code		th_u1.th_u2.th_u3.tu_code
-+#define	th_stuff	th_u1.tu_stuff
-+#define	th_data		th_u1.th_u2.tu_data
-+#define	th_msg		th_u1.th_u2.tu_data
-+
-+/*
-+ * Error codes.
-+ */
-+#define	EUNDEF		0		/* not defined */
-+#define	ENOTFOUND	1		/* file not found */
-+#define	EACCESS		2		/* access violation */
-+#define	ENOSPACE	3		/* disk full or allocation exceeded */
-+#define	EBADOP		4		/* illegal TFTP operation */
-+#define	EBADID		5		/* unknown transfer ID */
-+#define	EEXISTS		6		/* file already exists */
-+#define	ENOUSER		7		/* no such user */
-+
-+#endif /* arpa/tftp.h */
diff --git a/ndk-patches/fcntl.h.patch b/ndk-patches/fcntl.h.patch
deleted file mode 100644
index 0b6e78ebb..000000000
--- a/ndk-patches/fcntl.h.patch
+++ /dev/null
@@ -1,17 +0,0 @@
-Avoid defining constants which causes at least dpkg build to think that
-sync_file_range(2) is available - which it is not.
-
-diff -u -r /home/fornwall/lib/android-ndk/sysroot/usr/include/fcntl.h ./usr/include/fcntl.h
---- /home/fornwall/lib/android-ndk/sysroot/usr/include/fcntl.h	2017-06-07 01:07:52.000000000 +0200
-+++ ./usr/include/fcntl.h	2017-06-18 02:03:25.533276409 +0200
-@@ -61,10 +61,6 @@
- #define SPLICE_F_MORE 4
- #define SPLICE_F_GIFT 8
- 
--#define SYNC_FILE_RANGE_WAIT_BEFORE 1
--#define SYNC_FILE_RANGE_WRITE 2
--#define SYNC_FILE_RANGE_WAIT_AFTER 4
--
- int creat(const char*, mode_t);
- 
- #if __ANDROID_API__ >= 21
diff --git a/ndk-patches/grp.h.patch b/ndk-patches/grp.h.patch
index 8aa7c0cf0..5a47373af 100644
--- a/ndk-patches/grp.h.patch
+++ b/ndk-patches/grp.h.patch
@@ -1,6 +1,6 @@
 diff -u -r /home/fornwall/lib/android-ndk/sysroot/usr/include/grp.h ./usr/include/grp.h
---- /home/fornwall/lib/android-ndk/sysroot/usr/include/grp.h	2017-06-07 01:07:52.000000000 +0200
-+++ ./usr/include/grp.h	2017-06-18 01:40:08.452570901 +0200
+--- /home/fornwall/lib/android-ndk/sysroot/usr/include/grp.h	2017-11-09 09:57:12.000000000 +0100
++++ ./usr/include/grp.h	2017-11-15 11:43:43.065533963 +0100
 @@ -52,18 +52,11 @@
  
  /* Note: Android has thousands and thousands of ids to iterate through. */
@@ -14,8 +14,8 @@ diff -u -r /home/fornwall/lib/android-ndk/sysroot/usr/include/grp.h ./usr/includ
 -
 -
 -#if __ANDROID_API__ >= 24
--int getgrgid_r(gid_t, struct group*, char*, size_t, struct group**) __INTRODUCED_IN(24);
--int getgrnam_r(const char*, struct group*, char*, size_t, struct group**) __INTRODUCED_IN(24);
+-int getgrgid_r(gid_t __gid, struct group* __group, char* __buf, size_t __n, struct group** __result) __INTRODUCED_IN(24);
+-int getgrnam_r(const char* __name, struct group* __group, char* __buf, size_t __n, struct group** __result) __INTRODUCED_IN(24);
 -#endif /* __ANDROID_API__ >= 24 */
 +static struct group* getgrent(void) { return 0; }
 +static void setgrent(void) {}
@@ -23,5 +23,5 @@ diff -u -r /home/fornwall/lib/android-ndk/sysroot/usr/include/grp.h ./usr/includ
 +static int getgrgid_r(gid_t gid, struct group * grp, char * buf, size_t buflen, struct group ** result) { *result = 0; return 0; }
 +static int  getgrnam_r(const char * name, struct group * grp, char * buf, size_t buflen, struct group ** result) { *result = 0; return 0; }
  
- int getgrouplist (const char*, gid_t, gid_t*, int*);
- int initgroups (const char*, gid_t);
+ int getgrouplist(const char* __user, gid_t __group, gid_t* __groups, int* __group_count);
+ int initgroups(const char* __user, gid_t __group);
diff --git a/ndk-patches/langinfo.h.patch b/ndk-patches/langinfo.h.patch
index f7eace444..14d8a1b9c 100644
--- a/ndk-patches/langinfo.h.patch
+++ b/ndk-patches/langinfo.h.patch
@@ -1,5 +1,5 @@
 diff -N -a -u -r /home/fornwall/lib/android-ndk/sysroot/usr/include/langinfo.h ./usr/include/langinfo.h
---- /home/fornwall/lib/android-ndk/sysroot/usr/include/langinfo.h	2017-06-20 17:41:56.000000000 +0200
+--- /home/fornwall/lib/android-ndk/sysroot/usr/include/langinfo.h	2017-11-09 09:57:12.000000000 +0100
 +++ ./usr/include/langinfo.h	1970-01-01 01:00:00.000000000 +0100
 @@ -1,104 +0,0 @@
 -/*
@@ -98,8 +98,8 @@ diff -N -a -u -r /home/fornwall/lib/android-ndk/sysroot/usr/include/langinfo.h .
 -
 -
 -#if __ANDROID_API__ >= 26
--char* nl_langinfo(nl_item) __INTRODUCED_IN(26);
--char* nl_langinfo_l(nl_item, locale_t) __INTRODUCED_IN(26);
+-char* nl_langinfo(nl_item __item) __INTRODUCED_IN(26);
+-char* nl_langinfo_l(nl_item __item, locale_t __l) __INTRODUCED_IN(26);
 -#endif /* __ANDROID_API__ >= 26 */
 -
 -
diff --git a/ndk-patches/limits.h.patch b/ndk-patches/limits.h.patch
deleted file mode 100644
index c12f43f58..000000000
--- a/ndk-patches/limits.h.patch
+++ /dev/null
@@ -1,12 +0,0 @@
-diff -u -r /home/fornwall/lib/android-ndk/sysroot/usr/include/limits.h ./usr/include/limits.h
---- /home/fornwall/lib/android-ndk/sysroot/usr/include/limits.h	2017-06-07 01:07:52.000000000 +0200
-+++ ./usr/include/limits.h	2017-06-18 02:05:17.404056395 +0200
-@@ -139,7 +139,7 @@
- #define HOST_NAME_MAX _POSIX_HOST_NAME_MAX
- 
- #define  _POSIX_VERSION             200809L   /* Posix C language bindings version */
--#define  _POSIX2_VERSION            -1        /* we don't support Posix command-line tools */
-+#define  _POSIX2_VERSION            200809    /* Termux change to avoid coreutils obsolete breakage */
- #define  _XOPEN_VERSION             700       /* by Posix definition */
- 
- /* >= _POSIX_THREAD_DESTRUCTOR_ITERATIONS */
diff --git a/ndk-patches/linux-fcntl.h.patch b/ndk-patches/linux-fcntl.h.patch
index 0563e3d1f..5614657eb 100644
--- a/ndk-patches/linux-fcntl.h.patch
+++ b/ndk-patches/linux-fcntl.h.patch
@@ -1,18 +1,16 @@
 diff -u -r /home/fornwall/lib/android-ndk/sysroot/usr/include/linux/fcntl.h ./usr/include/linux/fcntl.h
---- /home/fornwall/lib/android-ndk/sysroot/usr/include/linux/fcntl.h	2017-06-07 01:07:52.000000000 +0200
-+++ ./usr/include/linux/fcntl.h	2017-06-18 01:44:54.697429382 +0200
-@@ -46,6 +46,14 @@
+--- /home/fornwall/lib/android-ndk/sysroot/usr/include/linux/fcntl.h	2017-11-09 09:57:12.000000000 +0100
++++ ./usr/include/linux/fcntl.h	2017-11-15 11:49:10.709710452 +0100
+@@ -40,6 +40,12 @@
+ #define DN_ATTRIB 0x00000020
  #define DN_MULTISHOT 0x80000000
  #define AT_FDCWD - 100
- /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
-+
 +/* Termux patch: This flag is not supported on Android 6.0+, and should not
 +   be needed since there are not setuid binaries. Define AT_EACCESS to 0 to
 +   avoid packages defining their own AT_EACCESS (which e.g. coreutil does)
 +   since that will only result in errors. See:
 +   https://android.googlesource.com/platform/bionic/+/3577825%5E!/      */
 +#define AT_EACCESS 0
-+
  #define AT_SYMLINK_NOFOLLOW 0x100
  #define AT_REMOVEDIR 0x200
  #define AT_SYMLINK_FOLLOW 0x400
diff --git a/ndk-patches/paths.h.patch b/ndk-patches/paths.h.patch
index b1731c2c9..d4cc3fe89 100644
--- a/ndk-patches/paths.h.patch
+++ b/ndk-patches/paths.h.patch
@@ -1,11 +1,13 @@
 diff -u -r /home/fornwall/lib/android-ndk/sysroot/usr/include/paths.h ./usr/include/paths.h
---- /home/fornwall/lib/android-ndk/sysroot/usr/include/paths.h	2017-06-07 01:07:52.000000000 +0200
-+++ ./usr/include/paths.h	2017-06-18 01:49:55.374140031 +0200
-@@ -34,13 +34,19 @@
+--- /home/fornwall/lib/android-ndk/sysroot/usr/include/paths.h	2017-11-09 09:57:12.000000000 +0100
++++ ./usr/include/paths.h	2017-11-15 11:51:24.456129565 +0100
+@@ -34,15 +34,19 @@
  
  #include <sys/cdefs.h>
  
+-#ifndef _PATH_BSHELL
 -#define	_PATH_BSHELL	"/system/bin/sh"
+-#endif
 +#define	_PATH_BSHELL	"@TERMUX_PREFIX@/bin/sh"
  #define	_PATH_CONSOLE	"/dev/console"
 -#define	_PATH_DEFPATH	"/sbin:/system/sbin:/system/bin:/system/xbin:/vendor/bin:/vendor/xbin"
@@ -16,10 +18,10 @@ diff -u -r /home/fornwall/lib/android-ndk/sysroot/usr/include/paths.h ./usr/incl
  #define	_PATH_MOUNTED	"/proc/mounts"
  #define	_PATH_TTY	"/dev/tty"
  
-+#define _PATH_STDPATH _PATH_DEFPATH
-+#define _PATH_TMP "@TERMUX_PREFIX@/tmp/"
-+#define _PATH_VARDB "@TERMUX_PREFIX@/var/db/"
-+#define _PATH_VARRUN "@TERMUX_PREFIX@/var/run/"
-+#define _PATH_VARTMP "@TERMUX_PREFIX@/var/tmp/"
++#define	_PATH_STDPATH	_PATH_DEFPATH
++#define	_PATH_TMP	"@TERMUX_PREFIX@/tmp/"
++#define	_PATH_VARDB	"@TERMUX_PREFIX@/var/db/"
++#define	_PATH_VARRUN	"@TERMUX_PREFIX@/var/run/"
++#define	_PATH_VARTMP	"@TERMUX_PREFIX@/var/tmp/"
 +
  #endif /* !_PATHS_H_ */
diff --git a/ndk-patches/pty.h.patch b/ndk-patches/pty.h.patch
index 68b7061bb..1c924a3e9 100644
--- a/ndk-patches/pty.h.patch
+++ b/ndk-patches/pty.h.patch
@@ -1,18 +1,19 @@
-In Termux these are implemented in the libutil package to support android-21.
-
 diff -u -r /home/fornwall/lib/android-ndk/sysroot/usr/include/pty.h ./usr/include/pty.h
---- /home/fornwall/lib/android-ndk/sysroot/usr/include/pty.h	2017-06-20 17:41:56.000000000 +0200
-+++ ./usr/include/pty.h	2017-07-02 11:42:39.244882732 +0200
-@@ -37,10 +37,8 @@
- __BEGIN_DECLS
+--- /home/fornwall/lib/android-ndk/sysroot/usr/include/pty.h	2017-11-09 09:57:12.000000000 +0100
++++ ./usr/include/pty.h	2017-11-15 11:52:53.115077179 +0100
+@@ -36,12 +36,9 @@
  
+ __BEGIN_DECLS
  
+-
 -#if __ANDROID_API__ >= 23
--int openpty(int*, int*, char*, const struct termios*, const struct winsize*) __INTRODUCED_IN(23);
--int forkpty(int*, char*, const struct termios*, const struct winsize*) __INTRODUCED_IN(23);
+-int openpty(int* __master_fd, int* __slave_fd, char* __slave_name, const struct termios* __termios_ptr, const struct winsize* __winsize_ptr) __INTRODUCED_IN(23);
+-int forkpty(int* __master_fd, char* __slave_name, const struct termios* __termios_ptr, const struct winsize* __winsize_ptr) __INTRODUCED_IN(23);
 -#endif /* __ANDROID_API__ >= 23 */
-+int openpty(int*, int*, char*, const struct termios*, const struct winsize*);
-+int forkpty(int*, char*, const struct termios*, const struct winsize*);
- 
+-
++/* In Termux these are implemented in the libutil package to support android-21. */
++int openpty(int* __master_fd, int* __slave_fd, char* __slave_name, const struct termios* __termios_ptr, const struct winsize* __winsize_ptr);
++int forkpty(int* __master_fd, char* __slave_name, const struct termios* __termios_ptr, const struct winsize* __winsize_ptr);
  
  __END_DECLS
+ 
diff --git a/ndk-patches/spawn.h.patch b/ndk-patches/spawn.h.patch
new file mode 100644
index 000000000..dcd5fef6a
--- /dev/null
+++ b/ndk-patches/spawn.h.patch
@@ -0,0 +1,20 @@
+diff -u -r /home/fornwall/lib/android-ndk/sysroot/usr/include/spawn.h ./usr/include/spawn.h
+--- /home/fornwall/lib/android-ndk/sysroot/usr/include/spawn.h	2017-11-09 09:57:12.000000000 +0100
++++ ./usr/include/spawn.h	2017-11-15 12:08:34.911786251 +0100
+@@ -36,6 +36,8 @@
+ 
+ __BEGIN_DECLS
+ 
++#if __ANDROID_API__ >= __ANDROID_API_FUTURE__
++
+ #define POSIX_SPAWN_RESETIDS 1
+ #define POSIX_SPAWN_SETPGROUP 2
+ #define POSIX_SPAWN_SETSIGDEF 4
+@@ -51,7 +53,6 @@
+ typedef struct __posix_spawn_file_actions* posix_spawn_file_actions_t;
+ 
+ 
+-#if __ANDROID_API__ >= __ANDROID_API_FUTURE__
+ int posix_spawn(pid_t* __pid, const char* __path, const posix_spawn_file_actions_t* __actions, const posix_spawnattr_t* __attr, char* const __argv[], char* const __env[]) __INTRODUCED_IN_FUTURE;
+ int posix_spawnp(pid_t* __pid, const char* __file, const posix_spawn_file_actions_t* __actions, const posix_spawnattr_t* __attr, char* const __argv[], char* const __env[]) __INTRODUCED_IN_FUTURE;
+ 
diff --git a/ndk-patches/stdio.h.patch b/ndk-patches/stdio.h.patch
index ee15fa1e4..55ab27c1e 100644
--- a/ndk-patches/stdio.h.patch
+++ b/ndk-patches/stdio.h.patch
@@ -1,6 +1,6 @@
 diff -u -r /home/fornwall/lib/android-ndk/sysroot/usr/include/stdio.h ./usr/include/stdio.h
---- /home/fornwall/lib/android-ndk/sysroot/usr/include/stdio.h	2017-06-07 01:07:52.000000000 +0200
-+++ ./usr/include/stdio.h	2017-06-18 01:59:17.835984565 +0200
+--- /home/fornwall/lib/android-ndk/sysroot/usr/include/stdio.h	2017-11-09 09:57:12.000000000 +0100
++++ ./usr/include/stdio.h	2017-11-15 11:57:58.567432093 +0100
 @@ -44,6 +44,9 @@
  #include <stdarg.h>
  #include <stddef.h>
@@ -8,20 +8,20 @@ diff -u -r /home/fornwall/lib/android-ndk/sysroot/usr/include/stdio.h ./usr/incl
 +#include <string.h>            /* For strcpy(3) used by ctermid() */
 +#include <asm/fcntl.h>         /* For O_RDWR and other O_* constants */
 +
- #define __need_NULL
- #include <stddef.h>
+ #include <bits/seek_constants.h>
  
-@@ -174,7 +178,7 @@
+ #if __ANDROID_API__ < __ANDROID_API_N__
+@@ -167,7 +170,7 @@
      __warnattr_strict("vsprintf is often misused; please use vsnprintf");
- char* tmpnam(char*)
+ char* tmpnam(char* __s)
      __warnattr("tempnam is unsafe, use mkstemp or tmpfile instead");
 -#define P_tmpdir "/tmp/" /* deprecated */
 +#define P_tmpdir "@TERMUX_PREFIX@/tmp/" /* deprecated */
- char* tempnam(const char*, const char*)
+ char* tempnam(const char* __dir, const char* __prefix)
      __warnattr("tempnam is unsafe, use mkstemp or tmpfile instead");
  
-@@ -239,8 +243,6 @@
-   __INTRODUCED_IN(24);
+@@ -242,8 +245,6 @@
+ FILE* freopen64(const char* __path, const char* __mode, FILE* __fp) __INTRODUCED_IN(24);
  #endif /* __ANDROID_API__ >= 24 */
  
 -FILE* tmpfile(void);
@@ -29,31 +29,29 @@ diff -u -r /home/fornwall/lib/android-ndk/sysroot/usr/include/stdio.h ./usr/incl
  #if __ANDROID_API__ >= 24
  FILE* tmpfile64(void) __INTRODUCED_IN(24);
  #endif /* __ANDROID_API__ >= 24 */
-@@ -256,10 +258,15 @@
+@@ -259,10 +260,15 @@
  
  #define L_ctermid 1024 /* size for ctermid() */
  
 -#if __ANDROID_API__ >= 26
--char* ctermid(char*) __INTRODUCED_IN(26);
+-char* ctermid(char* __buf) __INTRODUCED_IN(26);
 -#endif /* __ANDROID_API__ >= 26 */
-+/* Needed by gnulibs freading() */
++/* Needed by gnulibs freading(). */
 +#define __sferror(p)    (((p)->_flags & __SERR) != 0)
  
-+/* Used by perl, fish, and others */
++/* Used by perl, fish, and others. */
 +static __inline__ char* ctermid(char* s) {
-+    if (s == 0) return (char*) "/dev/tty";
-+    strcpy(s, "/dev/tty");
-+    return s;
++	if (s == 0) return (char*) "/dev/tty";
++	strcpy(s, "/dev/tty");
++	return s;
 +}
  
- FILE* fdopen(int, const char*);
- int fileno(FILE*);
-@@ -577,4 +584,31 @@
- 
- __END_DECLS
+ FILE* fdopen(int __fd, const char* __mode);
+ int fileno(FILE* __fp);
+@@ -310,6 +316,29 @@
+ #include <bits/fortify/stdio.h>
+ #endif
  
-+__BEGIN_DECLS
-+
 +int open(const char*, int, ...) __overloadable __RENAME_CLANG(open);
 +extern pid_t getpid();
 +extern int unlink(const char*);
@@ -77,6 +75,6 @@ diff -u -r /home/fornwall/lib/android-ndk/sysroot/usr/include/stdio.h ./usr/incl
 +	return NULL;
 +}
 +
-+__END_DECLS
-+
- #endif /* _STDIO_H_ */
+ __END_DECLS
+ 
+ #endif
diff --git a/ndk-patches/stdlib.h.patch b/ndk-patches/stdlib.h.patch
index d4a38f144..e17588b5e 100644
--- a/ndk-patches/stdlib.h.patch
+++ b/ndk-patches/stdlib.h.patch
@@ -1,6 +1,6 @@
 diff -u -r /home/fornwall/lib/android-ndk/sysroot/usr/include/stdlib.h ./usr/include/stdlib.h
---- /home/fornwall/lib/android-ndk/sysroot/usr/include/stdlib.h	2017-06-20 17:41:56.000000000 +0200
-+++ ./usr/include/stdlib.h	2017-07-16 12:30:31.724463111 +0200
+--- /home/fornwall/lib/android-ndk/sysroot/usr/include/stdlib.h	2017-11-09 09:57:12.000000000 +0100
++++ ./usr/include/stdlib.h	2017-11-15 12:49:51.790799140 +0100
 @@ -35,6 +35,7 @@
  #include <alloca.h>
  #include <malloc.h>
@@ -9,8 +9,8 @@ diff -u -r /home/fornwall/lib/android-ndk/sysroot/usr/include/stdlib.h ./usr/inc
  
  __BEGIN_DECLS
  
-@@ -210,8 +211,7 @@
- size_t wcstombs(char*, const wchar_t*, size_t);
+@@ -205,8 +206,7 @@
+ size_t wcstombs(char* __dst, const wchar_t* __src, size_t __n);
  
  #if __ANDROID_API__ >= __ANDROID_API_L__
 -size_t __ctype_get_mb_cur_max(void) __INTRODUCED_IN(21);
@@ -19,3 +19,14 @@ diff -u -r /home/fornwall/lib/android-ndk/sysroot/usr/include/stdlib.h ./usr/inc
  #else
  /*
   * Pre-L we didn't have any locale support and so we were always the POSIX
+@@ -244,7 +244,9 @@
+ float strtof_l(const char* __s, char** __end_ptr, locale_t __l) __INTRODUCED_IN(26);
+ long strtol_l(const char* __s, char** __end_ptr, int, locale_t __l) __INTRODUCED_IN(26);
+ #else
+-// Implemented as static inlines before 26.
++static __inline__ double strtod_l(const char* __s, char** __end_ptr, locale_t __l) { return strtod(__s, __end_ptr); }
++static __inline__ float strtof_l(const char* __s, char** __end_ptr, locale_t __l) { return strtof(__s, __end_ptr); }
++static __inline__ long strtol_l(const char* __s, char** __end_ptr, int __b, locale_t __l) { return strtol(__s, __end_ptr, __b); }
+ #endif
+ 
+ __END_DECLS
diff --git a/ndk-patches/string.h.patch b/ndk-patches/string.h.patch
deleted file mode 100644
index 7754e5755..000000000
--- a/ndk-patches/string.h.patch
+++ /dev/null
@@ -1,35 +0,0 @@
-See https://github.com/android-ndk/ndk/issues/440
-
-diff -u -r /home/fornwall/lib/android-ndk/sysroot/usr/include/string.h ./usr/include/string.h
---- /home/fornwall/lib/android-ndk/sysroot/usr/include/string.h	2017-06-20 17:41:56.000000000 +0200
-+++ ./usr/include/string.h	2017-06-30 22:15:01.161342640 +0200
-@@ -74,12 +74,12 @@
- #endif /* __ANDROID_API__ >= 18 */
- 
- #if defined(__USE_GNU)
-+#if __ANDROID_API__ >= 24
- #if defined(__cplusplus)
- extern "C++" char* strchrnul(char* _Nonnull, int) __RENAME(strchrnul) __attribute_pure__;
- extern "C++" const char* strchrnul(const char* _Nonnull, int) __RENAME(strchrnul) __attribute_pure__;
- #else
- 
--#if __ANDROID_API__ >= 24
- char* strchrnul(const char* _Nonnull, int) __attribute_pure__ __INTRODUCED_IN(24);
- #endif /* __ANDROID_API__ >= 24 */
- 
-@@ -169,6 +169,7 @@
- #endif
- 
- #if defined(__USE_GNU) && !defined(basename)
-+#if __ANDROID_API__ >= 23
- /*
-  * glibc has a basename in <string.h> that's different to the POSIX one in <libgen.h>.
-  * It doesn't modify its argument, and in C++ it's const-correct.
-@@ -178,7 +179,6 @@
- extern "C++" const char* basename(const char* _Nonnull) __RENAME(__gnu_basename);
- #else
- 
--#if __ANDROID_API__ >= 23
- char* basename(const char* _Nonnull) __RENAME(__gnu_basename) __INTRODUCED_IN(23);
- #endif /* __ANDROID_API__ >= 23 */
- 
diff --git a/ndk-patches/sys-ttydefault.h.patch b/ndk-patches/sys-ttydefault.h.patch
deleted file mode 100644
index a0e1fe969..000000000
--- a/ndk-patches/sys-ttydefault.h.patch
+++ /dev/null
@@ -1,14 +0,0 @@
-Needed by util-linux.
-
-diff -u -r /home/fornwall/lib/android-ndk/platforms/android-21/arch-arm/usr/include/sys/ttydefaults.h ./usr/include/sys/ttydefaults.h
---- /home/fornwall/lib/android-ndk/platforms/android-21/arch-arm/usr/include/sys/ttydefaults.h	2016-06-01 12:53:26.000000000 -0400
-+++ ./usr/include/sys/ttydefaults.h	2016-06-22 06:29:26.247578626 -0400
-@@ -46,7 +46,7 @@
-  * Defaults on "first" open.
-  */
- #define	TTYDEF_IFLAG	(BRKINT | ICRNL | IMAXBEL | IXON | IXANY)
--#define TTYDEF_OFLAG	(OPOST | ONLCR | OXTABS)
-+#define TTYDEF_OFLAG	(OPOST | ONLCR | XTABS)
- #define TTYDEF_LFLAG	(ECHO | ICANON | ISIG | IEXTEN | ECHOE|ECHOKE|ECHOCTL)
- #define TTYDEF_CFLAG	(CREAD | CS8 | HUPCL)
- #define TTYDEF_SPEED	(B9600)
diff --git a/ndk-patches/utmp.h.patch b/ndk-patches/utmp.h.patch
index 3c335e724..94af833bf 100644
--- a/ndk-patches/utmp.h.patch
+++ b/ndk-patches/utmp.h.patch
@@ -1,18 +1,17 @@
-In Termux login_tty() is implemented in the libutil package to support android-21.
-
 diff -u -r /home/fornwall/lib/android-ndk/sysroot/usr/include/utmp.h ./usr/include/utmp.h
---- /home/fornwall/lib/android-ndk/sysroot/usr/include/utmp.h	2017-06-20 17:41:56.000000000 +0200
-+++ ./usr/include/utmp.h	2017-07-10 09:47:42.422659110 +0200
-@@ -101,11 +101,7 @@
+--- /home/fornwall/lib/android-ndk/sysroot/usr/include/utmp.h	2017-11-09 09:57:12.000000000 +0100
++++ ./usr/include/utmp.h	2017-11-15 12:01:37.108811692 +0100
+@@ -101,11 +101,8 @@
  struct utmp* getutent(void);
  void endutent(void);
  
 -
 -#if __ANDROID_API__ >= 23
--int login_tty(int) __INTRODUCED_IN(23);
+-int login_tty(int __fd) __INTRODUCED_IN(23);
 -#endif /* __ANDROID_API__ >= 23 */
 -
-+int login_tty(int);
++/* In Termux login_tty() is implemented in the libutil package to support android-21. */
++int login_tty(int __fd);
  
  __END_DECLS
  
diff --git a/packages/aapt/build.sh b/packages/aapt/build.sh
index e93040f6f..2aecd7f4b 100644
--- a/packages/aapt/build.sh
+++ b/packages/aapt/build.sh
@@ -298,7 +298,7 @@ termux_step_make_install () {
 	rm -rf android-jar
 	mkdir android-jar
 	cd android-jar
-	cp $ANDROID_HOME/platforms/android-26/android.jar .
+	cp $ANDROID_HOME/platforms/android-27/android.jar .
 	unzip -q android.jar
 	mkdir -p $TERMUX_PREFIX/share/aapt
 	zip -q $TERMUX_PREFIX/share/aapt/android.jar AndroidManifest.xml resources.arsc
diff --git a/packages/ecj/build.sh b/packages/ecj/build.sh
index 89b8efa35..1353dcafe 100755
--- a/packages/ecj/build.sh
+++ b/packages/ecj/build.sh
@@ -1,7 +1,7 @@
 TERMUX_PKG_HOMEPAGE=http://www.eclipse.org/jdt/core/
 TERMUX_PKG_DESCRIPTION="Eclipse Compiler for Java"
 TERMUX_PKG_VERSION=4.6.2
-TERMUX_PKG_REVISION=1
+TERMUX_PKG_REVISION=2
 TERMUX_PKG_SRCURL=http://eclipse.mirror.wearetriple.com/eclipse/downloads/drops4/R-4.6.2-201611241400/ecj-4.6.2.jar
 TERMUX_PKG_PLATFORM_INDEPENDENT=true
 
@@ -28,7 +28,7 @@ termux_step_make () {
 	cd android-jar
 
         # We need the android classes for JDT to compile against.
-	cp $ANDROID_HOME/platforms/android-26/android.jar .
+	cp $ANDROID_HOME/platforms/android-27/android.jar .
 	unzip -q android.jar
 	rm -Rf android.jar resources.arsc res assets
 	zip -q -r android.jar .
diff --git a/scripts/setup-android-sdk.sh b/scripts/setup-android-sdk.sh
index 4f3b4b870..62f823a68 100755
--- a/scripts/setup-android-sdk.sh
+++ b/scripts/setup-android-sdk.sh
@@ -25,7 +25,7 @@ if [ ! -d $NDK ]; then
 	mkdir -p $NDK
 	cd $NDK/..
 	rm -Rf `basename $NDK`
-	NDK_VERSION=r15c
+	NDK_VERSION=r16
 	curl --fail --retry 3 -o ndk.zip \
 		http://dl.google.com/android/repository/android-ndk-${NDK_VERSION}-`uname`-x86_64.zip
 
@@ -38,4 +38,4 @@ fi
 yes | $ANDROID_HOME/tools/bin/sdkmanager --licenses
 
 # The android-16 platform is used in the ecj package:
-$ANDROID_HOME/tools/bin/sdkmanager "build-tools;26.0.1" "platforms;android-26" "platforms;android-16"
+$ANDROID_HOME/tools/bin/sdkmanager "build-tools;27.0.1" "platforms;android-27" "platforms;android-16"