ndk_patches: Define _POSIX2_VERSION to 200809

coreutils looks at _POSIX2_VERSION and enables broken obsolete
behaviour if not set.

Fixes https://github.com/termux/termux-app/issues/232.

build-package.sh

@@ -187,7 +187,7 @@ termux_step_setup_variables() {
 	TERMUX_STANDALONE_TOOLCHAIN="$TERMUX_TOPDIR/_lib/toolchain-${TERMUX_ARCH}-ndk${TERMUX_NDK_VERSION}-api${TERMUX_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+="-v3"
+	TERMUX_STANDALONE_TOOLCHAIN+="-v4"
 
 	export TERMUX_TAR="tar"
 	export TERMUX_TOUCH="touch"

ndk_patches/sys-limits.h.patch

@@ -0,0 +1,12 @@
+diff -u -r /home/fornwall/lib/android-ndk/platforms/android-21/arch-arm64/usr/include/sys/limits.h ./usr/include/sys/limits.h
+--- /home/fornwall/lib/android-ndk/platforms/android-21/arch-arm64/usr/include/sys/limits.h	2016-09-29 14:42:26.000000000 -0400
++++ ./usr/include/sys/limits.h	2017-01-07 01:23:19.004048281 -0500
+@@ -116,7 +116,7 @@
+ /* Bionic-specific definitions */
+ 
+ #define  _POSIX_VERSION             200112L   /* 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  _POSIX2_C_VERSION          _POSIX_VERSION
+ #define  _XOPEN_VERSION             500       /* by Posix definition */
+ #define  _XOPEN_XCU_VERSION         -1        /* we don't support command-line utilities */

packages/coreutils/build.sh

@@ -1,6 +1,7 @@
 TERMUX_PKG_HOMEPAGE=https://www.gnu.org/software/coreutils/
 TERMUX_PKG_DESCRIPTION="Basic file, shell and text manipulation utilities from the GNU project"
 TERMUX_PKG_VERSION=8.26
+TERMUX_PKG_BUILD_REVISION=1
 TERMUX_PKG_SRCURL=https://mirrors.kernel.org/gnu/coreutils/coreutils-${TERMUX_PKG_VERSION}.tar.xz
 TERMUX_PKG_SHA256=155e94d748f8e2bc327c66e0cbebdb8d6ab265d2f37c3c928f7bf6c3beba9a8e
 TERMUX_PKG_EXTRA_CONFIGURE_ARGS="ac_cv_func_mkfifo=yes gl_cv_host_operating_system=Android --without-gmp --enable-single-binary=symlinks ac_cv_func_endpwent=no"

packages/coreutils/tests/tails-c-flag.sh

@@ -0,0 +1,7 @@
+set -e -u
+
+RESULT=$(echo -n 123456 | tail -c 3)
+if [ "$RESULT" != 456 ]; then
+	echo "Test failed - expectd 456, got $RESULT"
+	exit 1
+fi