diff --git a/dist/tools/toolchains/build_x86.sh b/dist/tools/toolchains/build_x86.sh
deleted file mode 100755
index 3e417b38b4..0000000000
--- a/dist/tools/toolchains/build_x86.sh
+++ /dev/null
@@ -1,376 +0,0 @@
-#!/usr/bin/env bash
-
-# directory to download source files and store intermediates
-[[ -z $TARGET ]] && TARGET=i586-none-elf
-[[ -z $TMP_DIR ]] && TMP_DIR=/var/tmp/RIOT-toolchain-${USER}
-[[ -z $BUILDDIR ]] && BUILDDIR=${TMP_DIR}/${TARGET}
-[[ -z $PREFIX ]] && PREFIX=${PWD}/toolchain/${TARGET}
-[[ -z $MAKE_THREADS ]] && MAKE_THREADS=
-PATCHDIR=$(readlink -e "$(dirname $0)/patches")
-
-NEWLIB_VER=2.2.0.20150623
-NEWLIB_ARCHIVE=newlib-${NEWLIB_VER}.tar.gz
-NEWLIB_MD5=5cf6cd9ded91bca10c9f0a22a9da8e02
-NEWLIB_CONFIGURE_FLAGS=(
-    --target=${TARGET}
-    --prefix=${PREFIX}
-    --with-gmp=${PREFIX}
-    --with-mpfr=${PREFIX}
-    --with-mpc=${PREFIX}
-    --enable-interwork
-    --enable-multilib
-
-    --enable-target-optspace
-    --disable-newlib-supplied-syscalls
-    --disable-newlib-reent-small
-    --enable-newlib-io-long-long
-    --enable-newlib-io-float
-    --enable-newlib-io-pos-args
-    --enable-newlib-io-c99-formats
-    --enable-newlib-multithread
-)
-NEWLIB_PATCHES=(
-newlib-2.2.0.20150623-RIOT-i586-none-elf.patch
-)
-NEWLIB_TARGET_CFLAGS=(
-    -DREENTRANT_SYSCALLS_PROVIDED
-    -DMALLOC_PROVIDED
-    -DSIGNAL_PROVIDED
-    -DPREFER_SIZE_OVER_SPEED
-
-    -ggdb3
-    -Os
-    -fomit-frame-pointer
-    -ffunction-sections
-    -fdata-sections
-)
-
-GCC_VER=4.8.5
-GCC_ARCHIVE=gcc-${GCC_VER}.tar.bz2
-GCC_MD5=80d2c2982a3392bb0b89673ff136e223
-GCC_CONFIGURE_FLAGS=(
-    --target=${TARGET}
-    --prefix=${PREFIX}
-    --with-gmp=${PREFIX}
-    --with-mpfr=${PREFIX}
-    --with-mpc=${PREFIX}
-
-    --enable-interwork
-    --enable-multilib
-    --enable-languages="c,c++"
-    --with-newlib
-    --disable-libssp
-    --with-headers=${BUILDDIR}/newlib-${NEWLIB_VER}/newlib/libc/include
-    --enable-obsolete
-    --enable-target-optspace
-    --disable-nls
-)
-
-BINUTILS_VER=2.25
-BINUTILS_ARCHIVE=binutils-${BINUTILS_VER}.tar.bz2
-BINUTILS_MD5=d9f3303f802a5b6b0bb73a335ab89d66
-BINUTILS_CONFIGURE_FLAGS=(
-    --prefix=${PREFIX}
-
-    --enable-interwork
-    --enable-multilib
-    --disable-nls
-)
-
-GDB_VER=7.9.1
-GDB_ARCHIVE=gdb-${GDB_VER}.tar.xz
-GDB_MD5=35374c77a70884eb430c97061053a36e
-GDB_CONFIGURE_FLAGS=(
-    --target=${TARGET}
-    --prefix=${PREFIX}
-    --with-gmp=${PREFIX}
-    --with-mpfr=${PREFIX}
-    --with-mpc=${PREFIX}
-
-    --enable-interwork
-    --enable-multilib
-    --disable-nls
-)
-
-GMP_VER=5.1.3
-GMP_ARCHIVE=gmp-${GMP_VER}.tar.xz
-GMP_MD5=e5fe367801ff067b923d1e6a126448aa
-GMP_CONFIGURE_FLAGS=(
-    --prefix=${PREFIX}
-
-    --enable-cxx
-    --disable-nls
-)
-
-MPFR_VER=3.1.2
-MPFR_ARCHIVE=mpfr-${MPFR_VER}.tar.xz
-MPFR_MD5=e3d203d188b8fe60bb6578dd3152e05c
-MPFR_CONFIGURE_FLAGS=(
-    --prefix=${PREFIX}
-    --with-gmp=${PREFIX}
-
-    --disable-nls
-)
-
-MPC_VER=1.0.2
-MPC_ARCHIVE=mpc-${MPC_VER}.tar.gz
-MPC_MD5=68fadff3358fb3e7976c7a398a0af4c3
-MPC_CONFIGURE_FLAGS=(
-    --prefix=${PREFIX}
-    --with-gmp=${PREFIX}
-    --with-mpfr=${PREFIX}
-
-    --disable-nls
-)
-
-DOWNLOADER=wget
-DOWNLOADER_OPTS="-nv -c"
-
-SPACE_NEEDED=3264960
-
-build_binutils() {
-    cd ${BUILDDIR}
-    echo
-    [[ -e .binutils_built ]] && return
-
-    local TARGETS=(${TARGET} i386-efi-pe)
-    for i in 0 1; do
-        echo "Building binutils (${BINUTILS_VER}) for ${TARGETS[$i]} ..."
-
-        rm -rf binutils-${TARGETS[$i]}-build &&
-        mkdir -p binutils-${TARGETS[$i]}-build &&
-        cd binutils-${TARGETS[$i]}-build &&
-
-        ../binutils-${BINUTILS_VER}/configure "${BINUTILS_CONFIGURE_FLAGS[@]}" --target=${TARGETS[$i]} --enable-targets=${TARGETS[$i]},${TARGETS[1-$i]} &&
-        make ${MAKE_THREADS} all &&
-        make install &&
-        cd ${BUILDDIR} ||
-        return $?
-    done
-
-    date -uIns > .binutils_built
-}
-
-build_gcc() {
-    cd ${BUILDDIR}
-    echo
-    echo "Building gcc (${GCC_VER}) ..."
-    [[ -e .gcc_built ]] && return
-
-    rm -rf gcc-build && mkdir -p gcc-build && cd gcc-build &&
-    ../gcc-${GCC_VER}/configure "${GCC_CONFIGURE_FLAGS[@]}" &&
-    make ${MAKE_THREADS} all &&
-    make install &&
-
-    cd ${BUILDDIR} &&
-    date -uIns > .gcc_built
-}
-
-build_newlib() {
-    cd ${BUILDDIR}
-    echo
-    echo "Building newlib (${NEWLIB_VER}) ..."
-    [[ -e .newlib_built ]] && return
-
-    rm -rf newlib-build && mkdir -p newlib-build && cd newlib-build &&
-
-    CFLAGS="${NEWLIB_TARGET_CFLAGS[*]}" \
-    CXXFLAGS="${NEWLIB_TARGET_CFLAGS[*]}" \
-    CFLAGS_FOR_TARGET="${NEWLIB_TARGET_CFLAGS[*]}" \
-    CXXFLAGS_FOR_TARGET="${NEWLIB_TARGET_CFLAGS[*]}" \
-    ../newlib-${NEWLIB_VER}/configure "${NEWLIB_CONFIGURE_FLAGS[@]}" &&
-    sed -i ./Makefile -e '/C\(XX\)\?FLAGS_FOR_TARGET = -g /d' &&
-
-    make ${MAKE_THREADS} all &&
-
-    make install &&
-
-    cd ${BUILDDIR} &&
-    date -uIns > .newlib_built
-}
-
-build_gdb() {
-    cd ${BUILDDIR}
-    echo
-    echo "Building gdb (${GDB_VER}) ..."
-    [[ -e .gdb_built ]] && return
-
-    rm -rf gdb-build && mkdir -p gdb-build && cd gdb-build &&
-    ../gdb-${GDB_VER}/configure "${GDB_CONFIGURE_FLAGS[@]}" &&
-    make ${MAKE_THREADS} all CFLAGS="-U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=0" &&
-    make install &&
-
-    cd ${BUILDDIR} &&
-    date -uIns > .gdb_built
-}
-
-build_gmp() {
-    cd ${BUILDDIR}
-    echo
-    echo "Building gmp (${GMP_VER}) ..."
-    [[ -e .gmp_built ]] && return
-
-    rm -rf gmp-build && mkdir -p gmp-build && cd gmp-build &&
-    ../gmp-${GMP_VER}/configure "${GMP_CONFIGURE_FLAGS[@]}" &&
-    make ${MAKE_THREADS} all &&
-    make install &&
-
-    cd ${BUILDDIR} &&
-    date -uIns > .gmp_built
-}
-
-build_mpfr() {
-    cd ${BUILDDIR}
-    echo
-    echo "Building mpfr (${MPFR_VER}) ..."
-    [[ -e .mpfr_built ]] && return
-
-    rm -rf mpfr-build && mkdir -p mpfr-build && cd mpfr-build &&
-    ../mpfr-${MPFR_VER}/configure "${MPFR_CONFIGURE_FLAGS[@]}" &&
-    make ${MAKE_THREADS} all &&
-    make install &&
-
-    cd ${BUILDDIR} &&
-    date -uIns > .mpfr_built
-}
-
-build_mpc() {
-    cd ${BUILDDIR}
-    echo
-    echo "Building mpc (${MPC_VER}) ..."
-    [[ -e .mpc_built ]] && return
-
-    rm -rf mpc-build && mkdir -p mpc-build && cd mpc-build &&
-    ../mpc-${MPC_VER}/configure "${MPC_CONFIGURE_FLAGS[@]}" &&
-    make ${MAKE_THREADS} all &&
-    make install &&
-
-    cd ${BUILDDIR} &&
-    date -uIns > .mpc_built
-}
-
-clean() {
-    echo
-    echo "Cleaning up..."
-    for F in binutils gcc newlib gdb gmp mpfr mpc; do
-        rm -rf ./.${F}_extracted ./.${F}_built ./${F}_build || return $?
-    done
-}
-
-export PATH=$PATH:${PREFIX}/bin
-
-download() {
-    echo
-    echo "Downloading TAR files."
-
-    download_file ftp://ftp.cs.tu-berlin.de/pub/gnu/binutils ${BINUTILS_ARCHIVE} ${BINUTILS_MD5} &&
-    download_file ftp://ftp.cs.tu-berlin.de/pub/gnu/gcc/gcc-${GCC_VER} ${GCC_ARCHIVE} ${GCC_MD5} &&
-    download_file ftp://ftp.cs.tu-berlin.de/pub/gnu/gdb ${GDB_ARCHIVE} ${GDB_MD5} &&
-    download_file ftp://ftp.cs.tu-berlin.de/pub/gnu/gmp ${GMP_ARCHIVE} ${GMP_MD5} &&
-    download_file ftp://ftp.cs.tu-berlin.de/pub/gnu/mpfr ${MPFR_ARCHIVE} ${MPFR_MD5} &&
-    download_file ftp://ftp.cs.tu-berlin.de/pub/gnu/mpc ${MPC_ARCHIVE} ${MPC_MD5} &&
-    download_file ftp://sources.redhat.com/pub/newlib ${NEWLIB_ARCHIVE} ${NEWLIB_MD5}
-}
-
-extract() {
-    echo
-    echo "Extracting TAR files."
-
-    if [[ ! -x ./binutils-${BINUTILS_VER}/configure ]]; then
-        tar axf ${TMP_DIR}/${BINUTILS_ARCHIVE} || return $?
-    fi
-    if [[ ! -x ./gcc-${GCC_VER}/configure ]]; then
-        tar axf ${TMP_DIR}/${GCC_ARCHIVE} || return $?
-    fi
-    if [[ ! -x ./gdb-${GDB_VER}/configure ]]; then
-        tar axf ${TMP_DIR}/${GDB_ARCHIVE} || return $?
-    fi
-    if [[ ! -x ./gmp-${GMP_VER}/configure ]]; then
-        tar axf ${TMP_DIR}/${GMP_ARCHIVE} || return $?
-    fi
-    if [[ ! -x ./mpfr-${MPFR_VER}/configure ]]; then
-        tar axf ${TMP_DIR}/${MPFR_ARCHIVE} || return $?
-    fi
-    if [[ ! -x ./mpc-${MPC_VER}/configure ]]; then
-        tar axf ${TMP_DIR}/${MPC_ARCHIVE} || return $?
-    fi
-    if [[ ! -x ./newlib-${NEWLIB_VER}/configure ]]; then
-        tar axf ${TMP_DIR}/${NEWLIB_ARCHIVE} &&
-        for (( I=0; I < ${#NEWLIB_PATCHES[@]}; I+=1 )); do
-            echo "Applying Newlib patch ${NEWLIB_PATCHES[$I]}"
-            for (( P=0; P < 4; P+=1 )); do
-                patch -p${P} --ignore-whitespace --dry-run -f < "${PATCHDIR}/${NEWLIB_PATCHES[$I]}" 2>&1 > /dev/null || continue
-                patch -p${P} --ignore-whitespace -f < "${PATCHDIR}/${NEWLIB_PATCHES[$I]}" || return $?
-                break
-            done
-        done
-    fi
-}
-
-download_file() {
-    echo "Downloading ${1}/${2}..."
-    cd ${TMP_DIR} &&
-    ${DOWNLOADER} ${DOWNLOADER_OPTS} $1/$2 &&
-    echo -n "Checking MD5 of " &&
-    echo "${3}  ${2}" | md5sum -c - &&
-    cd ${BUILDDIR}
-}
-
-check_space() {
-    echo
-    echo "Checking disk space in ${TMP_DIR}"
-
-    FREETMP=$(df ${BUILDDIR} | awk '{ if (NR == 2) print $4}')
-    if [[ $FREETMP -lt $SPACE_NEEDED ]]; then
-        echo "Not enough available space in ${TMP_DIR}."
-        echo "Minimum ${SPACE_NEEDED} free bytes required."
-        return 1
-    fi
-}
-
-all() {
-    echo
-    echo "Starting in ${BUILDDIR}. Installing to ${PREFIX}."
-
-    check_space &&
-    download &&
-    extract &&
-    build_binutils &&
-    build_gmp &&
-    build_mpfr &&
-    build_mpc &&
-    build_gcc &&
-    build_newlib &&
-    build_gdb &&
-
-    echo &&
-    echo 'Success!' &&
-    echo "Insert \"export PATH=${PREFIX}/bin:\$PATH\" to your .bashrc"
-}
-
-usage() {
-    echo "usage: ${0} [all | download | extract | clean | build_[binutils|gcc|newlib|gdb|gmp|mpfr|mpc]]"
-    echo "example: ${0} all"
-    echo ""
-    echo "Builds a(n) \"${TARGET}\" toolchain,"
-    echo "installs into \"${PREFIX}\", and"
-    echo "uses \"${TMP_DIR}\" as temp."
-    echo ""
-    echo "Use PREFIX=... and TMP_DIR=... to change these directories."
-    echo "Use TARGET=... to change the target (affects PREFIX)."
-    echo ""
-    echo "Run like \"MAKE_THREADS=-j$(nproc) ${0} all\" to speed up on multicore systems."
-}
-
-if [[ -z $1 ]]; then
-    usage
-    exit 1
-fi
-
-mkdir -p ${PREFIX} &&
-mkdir -p ${TMP_DIR} &&
-mkdir -p ${BUILDDIR} &&
-cd ${BUILDDIR} &&
-for arg; do
-    ${arg} || exit $?
-done
diff --git a/dist/tools/toolchains/patches/newlib-2.1.0-RIOT-i586-none-elf.patch b/dist/tools/toolchains/patches/newlib-2.1.0-RIOT-i586-none-elf.patch
deleted file mode 100644
index ba16def9e5..0000000000
--- a/dist/tools/toolchains/patches/newlib-2.1.0-RIOT-i586-none-elf.patch
+++ /dev/null
@@ -1,446 +0,0 @@
-diff --git a/libgloss/arm/_exit.c b/libgloss/arm/_exit.c
-index ed00876..9c59b23 100644
---- a/libgloss/arm/_exit.c
-+++ b/libgloss/arm/_exit.c
-@@ -12,4 +12,5 @@ _exit (int status)
-      Note: The RDI implementation of _kill throws away both its
-      arguments.  */
-   _kill (status, -1);
-+  __builtin_unreachable ();
- }
-diff --git a/libgloss/i386/cygmon-gmon.c b/libgloss/i386/cygmon-gmon.c
-index 480b2ec..a4f615d 100644
---- a/libgloss/i386/cygmon-gmon.c
-+++ b/libgloss/i386/cygmon-gmon.c
-@@ -57,11 +57,12 @@
-  * should be.
-  */
-
-+#include <string.h>
-+
- #ifndef lint
- static char sccsid[] = "@(#)gmon.c	5.3 (Berkeley) 5/22/91";
- #endif /* not lint */
-
--#define DEBUG
- #ifdef DEBUG
- #include <stdio.h>
- #endif
-diff --git a/newlib/libc/include/stdio.h b/newlib/libc/include/stdio.h
-index c2418fa..ba61ab7 100644
---- a/newlib/libc/include/stdio.h
-+++ b/newlib/libc/include/stdio.h
-@@ -613,36 +613,7 @@ _ELIDABLE_INLINE int __sgetc_r(struct _reent *__ptr, FILE *__p)
- #define __sgetc_r(__ptr, __p) __sgetc_raw_r(__ptr, __p)
- #endif
-
--#ifdef _never /* __GNUC__ */
--/* If this inline is actually used, then systems using coff debugging
--   info get hopelessly confused.  21sept93 rich@cygnus.com.  */
--_ELIDABLE_INLINE int __sputc_r(struct _reent *_ptr, int _c, FILE *_p) {
--	if (--_p->_w >= 0 || (_p->_w >= _p->_lbfsize && (char)_c != '\n'))
--		return (*_p->_p++ = _c);
--	else
--		return (__swbuf_r(_ptr, _c, _p));
--}
--#else
--/*
-- * This has been tuned to generate reasonable code on the vax using pcc
-- */
--#define       __sputc_raw_r(__ptr, __c, __p) \
--	(--(__p)->_w < 0 ? \
--		(__p)->_w >= (__p)->_lbfsize ? \
--			(*(__p)->_p = (__c)), *(__p)->_p != '\n' ? \
--				(int)*(__p)->_p++ : \
--				__swbuf_r(__ptr, '\n', __p) : \
--			__swbuf_r(__ptr, (int)(__c), __p) : \
--		(*(__p)->_p = (__c), (int)*(__p)->_p++))
--#ifdef __SCLE
--#define __sputc_r(__ptr, __c, __p) \
--        ((((__p)->_flags & __SCLE) && ((__c) == '\n')) \
--          ? __sputc_raw_r(__ptr, '\r', (__p)) : 0 , \
--        __sputc_raw_r((__ptr), (__c), (__p)))
--#else
--#define __sputc_r(__ptr, __c, __p) __sputc_raw_r(__ptr, __c, __p)
--#endif
--#endif
-+int _EXFUN(__sputc_r, (struct _reent *, int, FILE *));
-
- #define	__sfeof(p)	(((p)->_flags & __SEOF) != 0)
- #define	__sferror(p)	(((p)->_flags & __SERR) != 0)
-@@ -655,17 +626,6 @@ _ELIDABLE_INLINE int __sputc_r(struct _reent *_ptr, int _c, FILE *_p) {
- #define	clearerr(p)	__sclearerr(p)
- #endif
-
--#if 0 /*ndef __STRICT_ANSI__ - FIXME: must initialize stdio first, use fn */
--#define	fileno(p)	__sfileno(p)
--#endif
--
--#ifndef __CYGWIN__
--#ifndef lint
--#define	getc(fp)	__sgetc_r(_REENT, fp)
--#define putc(x, fp)	__sputc_r(_REENT, x, fp)
--#endif /* lint */
--#endif /* __CYGWIN__ */
--
- #ifndef __STRICT_ANSI__
- /* fast always-buffered version, true iff error */
- #define	fast_putc(x,p) (--(p)->_w < 0 ? \
-@@ -679,9 +639,6 @@ _ELIDABLE_INLINE int __sputc_r(struct _reent *_ptr, int _c, FILE *_p) {
-
- #endif /* !__CUSTOM_FILE_IO__ */
-
--#define	getchar()	getc(stdin)
--#define	putchar(x)	putc(x, stdout)
--
- _END_STD_C
-
- #endif /* _STDIO_H */
-diff --git a/newlib/libc/stdio/putc.c b/newlib/libc/stdio/putc.c
-index 2b1fd1b..f64925e 100644
---- a/newlib/libc/stdio/putc.c
-+++ b/newlib/libc/stdio/putc.c
-@@ -89,6 +89,13 @@ static char sccsid[] = "%W% (Berkeley) %G%";
-
- #undef putc
-
-+int __sputc_r(struct _reent *_ptr, int _c, FILE *_p) {
-+    if (--_p->_w >= 0 || (_p->_w >= _p->_lbfsize && (char)_c != '\\n'))
-+        return (*_p->_p++ = _c);
-+    else
-+        return (__swbuf_r(_ptr, _c, _p));
-+}
-+
- int
- _DEFUN(_putc_r, (ptr, c, fp),
-        struct _reent *ptr _AND
-diff --git a/newlib/libc/stdlib/mallocr.c b/newlib/libc/stdlib/mallocr.c
-index ecc445f..c9f5a00 100644
---- a/newlib/libc/stdlib/mallocr.c
-+++ b/newlib/libc/stdlib/mallocr.c
-@@ -1,6 +1,3 @@
--#ifdef MALLOC_PROVIDED
--int _dummy_mallocr = 1;
--#else
- /* ---------- To make a malloc.h, start cutting here ------------ */
-
- /*
-@@ -381,11 +378,7 @@ extern void __malloc_unlock();
-
- */
-
--#if DEBUG
--#include <assert.h>
--#else
- #define assert(x) ((void)0)
--#endif
-
-
- /*
-@@ -1761,141 +1754,6 @@ extern unsigned long max_mmapped_mem;
-   Debugging support
- */
-
--#if DEBUG
--
--
--/*
--  These routines make a number of assertions about the states
--  of data structures that should be true at all times. If any
--  are not true, it's very likely that a user program has somehow
--  trashed memory. (It's also possible that there is a coding error
--  in malloc. In which case, please report it!)
--*/
--
--#if __STD_C
--static void do_check_chunk(mchunkptr p)
--#else
--static void do_check_chunk(p) mchunkptr p;
--#endif
--{
--  INTERNAL_SIZE_T sz = p->size & ~PREV_INUSE;
--
--  /* No checkable chunk is mmapped */
--  assert(!chunk_is_mmapped(p));
--
--  /* Check for legal address ... */
--  assert((char*)p >= sbrk_base);
--  if (p != top)
--    assert((char*)p + sz <= (char*)top);
--  else
--    assert((char*)p + sz <= sbrk_base + sbrked_mem);
--
--}
--
--
--#if __STD_C
--static void do_check_free_chunk(mchunkptr p)
--#else
--static void do_check_free_chunk(p) mchunkptr p;
--#endif
--{
--  INTERNAL_SIZE_T sz = p->size & ~PREV_INUSE;
--  mchunkptr next = chunk_at_offset(p, sz);
--
--  do_check_chunk(p);
--
--  /* Check whether it claims to be free ... */
--  assert(!inuse(p));
--
--  /* Unless a special marker, must have OK fields */
--  if ((long)sz >= (long)MINSIZE)
--  {
--    assert((sz & MALLOC_ALIGN_MASK) == 0);
--    assert(aligned_OK(chunk2mem(p)));
--    /* ... matching footer field */
--    assert(next->prev_size == sz);
--    /* ... and is fully consolidated */
--    assert(prev_inuse(p));
--    assert (next == top || inuse(next));
--
--    /* ... and has minimally sane links */
--    assert(p->fd->bk == p);
--    assert(p->bk->fd == p);
--  }
--  else /* markers are always of size SIZE_SZ */
--    assert(sz == SIZE_SZ);
--}
--
--#if __STD_C
--static void do_check_inuse_chunk(mchunkptr p)
--#else
--static void do_check_inuse_chunk(p) mchunkptr p;
--#endif
--{
--  mchunkptr next = next_chunk(p);
--  do_check_chunk(p);
--
--  /* Check whether it claims to be in use ... */
--  assert(inuse(p));
--
--  /* ... and is surrounded by OK chunks.
--    Since more things can be checked with free chunks than inuse ones,
--    if an inuse chunk borders them and debug is on, it's worth doing them.
--  */
--  if (!prev_inuse(p))
--  {
--    mchunkptr prv = prev_chunk(p);
--    assert(next_chunk(prv) == p);
--    do_check_free_chunk(prv);
--  }
--  if (next == top)
--  {
--    assert(prev_inuse(next));
--    assert(chunksize(next) >= MINSIZE);
--  }
--  else if (!inuse(next))
--    do_check_free_chunk(next);
--
--}
--
--#if __STD_C
--static void do_check_malloced_chunk(mchunkptr p, INTERNAL_SIZE_T s)
--#else
--static void do_check_malloced_chunk(p, s) mchunkptr p; INTERNAL_SIZE_T s;
--#endif
--{
--  INTERNAL_SIZE_T sz = p->size & ~PREV_INUSE;
--  long room = long_sub_size_t(sz, s);
--
--  do_check_inuse_chunk(p);
--
--  /* Legal size ... */
--  assert((long)sz >= (long)MINSIZE);
--  assert((sz & MALLOC_ALIGN_MASK) == 0);
--  assert(room >= 0);
--  assert(room < (long)MINSIZE);
--
--  /* ... and alignment */
--  assert(aligned_OK(chunk2mem(p)));
--
--
--  /* ... and was allocated at front of an available chunk */
--  assert(prev_inuse(p));
--
--}
--
--
--#define check_free_chunk(P)  do_check_free_chunk(P)
--#define check_inuse_chunk(P) do_check_inuse_chunk(P)
--#define check_chunk(P) do_check_chunk(P)
--#define check_malloced_chunk(P,N) do_check_malloced_chunk(P,N)
--#else
--#define check_free_chunk(P)
--#define check_inuse_chunk(P)
--#define check_chunk(P)
--#define check_malloced_chunk(P,N)
--#endif
--
-
-
- /*
-@@ -2126,7 +1984,7 @@ static mchunkptr mremap_chunk(p, new_size) mchunkptr p; size_t new_size;
-
-
-
--#ifdef DEFINE_MALLOC
-+#if defined (DEFINE_MALLOC) && !defined (MALLOC_PROVIDED)
-
- /*
-   Extend the top-most chunk by obtaining memory from system.
-@@ -3275,99 +3133,7 @@ void cfree(mem) Void_t *mem;
- #endif
-
- #endif /* DEFINE_CFREE */
--
--#ifdef DEFINE_FREE
--
--/*
--
--    Malloc_trim gives memory back to the system (via negative
--    arguments to sbrk) if there is unused memory at the `high' end of
--    the malloc pool. You can call this after freeing large blocks of
--    memory to potentially reduce the system-level memory requirements
--    of a program. However, it cannot guarantee to reduce memory. Under
--    some allocation patterns, some large free blocks of memory will be
--    locked between two used chunks, so they cannot be given back to
--    the system.
--
--    The `pad' argument to malloc_trim represents the amount of free
--    trailing space to leave untrimmed. If this argument is zero,
--    only the minimum amount of memory to maintain internal data
--    structures will be left (one page or less). Non-zero arguments
--    can be supplied to maintain enough trailing space to service
--    future expected allocations without having to re-obtain memory
--    from the system.
--
--    Malloc_trim returns 1 if it actually released any memory, else 0.
--
--*/
--
--#if __STD_C
--int malloc_trim(RARG size_t pad)
--#else
--int malloc_trim(RARG pad) RDECL size_t pad;
--#endif
--{
--  long  top_size;        /* Amount of top-most memory */
--  long  extra;           /* Amount to release */
--  char* current_brk;     /* address returned by pre-check sbrk call */
--  char* new_brk;         /* address returned by negative sbrk call */
--
--  unsigned long pagesz = malloc_getpagesize;
--
--  MALLOC_LOCK;
--
--  top_size = chunksize(top);
--  extra = ((top_size - pad - MINSIZE + (pagesz-1)) / pagesz - 1) * pagesz;
-
--  if (extra < (long)pagesz)  /* Not enough memory to release */
--  {
--    MALLOC_UNLOCK;
--    return 0;
--  }
--
--  else
--  {
--    /* Test to make sure no one else called sbrk */
--    current_brk = (char*)(MORECORE (0));
--    if (current_brk != (char*)(top) + top_size)
--    {
--      MALLOC_UNLOCK;
--      return 0;     /* Apparently we don't own memory; must fail */
--    }
--
--    else
--    {
--      new_brk = (char*)(MORECORE (-extra));
--
--      if (new_brk == (char*)(MORECORE_FAILURE)) /* sbrk failed? */
--      {
--        /* Try to figure out what we have */
--        current_brk = (char*)(MORECORE (0));
--        top_size = current_brk - (char*)top;
--        if (top_size >= (long)MINSIZE) /* if not, we are very very dead! */
--        {
--          sbrked_mem = current_brk - sbrk_base;
--          set_head(top, top_size | PREV_INUSE);
--        }
--        check_chunk(top);
--	MALLOC_UNLOCK;
--        return 0;
--      }
--
--      else
--      {
--        /* Success. Adjust top accordingly. */
--        set_head(top, (top_size - extra) | PREV_INUSE);
--        sbrked_mem -= extra;
--        check_chunk(top);
--	MALLOC_UNLOCK;
--        return 1;
--      }
--    }
--  }
--}
--
--#endif /* DEFINE_FREE */
-
- #ifdef DEFINE_MALLOC_USABLE_SIZE
-
-@@ -3397,11 +3163,6 @@ size_t malloc_usable_size(RARG mem) RDECL Void_t* mem;
-     if(!chunk_is_mmapped(p))
-     {
-       if (!inuse(p)) return 0;
--#if DEBUG
--      MALLOC_LOCK;
--      check_inuse_chunk(p);
--      MALLOC_UNLOCK;
--#endif
-       return chunksize(p) - SIZE_SZ;
-     }
-     return chunksize(p) - 2*SIZE_SZ;
-@@ -3419,9 +3180,6 @@ STATIC void malloc_update_mallinfo()
-   int i;
-   mbinptr b;
-   mchunkptr p;
--#if DEBUG
--  mchunkptr q;
--#endif
-
-   INTERNAL_SIZE_T avail = chunksize(top);
-   int   navail = ((long)(avail) >= (long)MINSIZE)? 1 : 0;
-@@ -3431,13 +3189,6 @@ STATIC void malloc_update_mallinfo()
-     b = bin_at(i);
-     for (p = last(b); p != b; p = p->bk)
-     {
--#if DEBUG
--      check_free_chunk(p);
--      for (q = next_chunk(p);
--           q < top && inuse(q) && (long)(chunksize(q)) >= (long)MINSIZE;
--           q = next_chunk(q))
--        check_inuse_chunk(q);
--#endif
-       avail += chunksize(p);
-       navail++;
-     }
-@@ -3697,4 +3448,3 @@ History:
-          structure of old version,  but most details differ.)
-
- */
--#endif
-diff --git a/newlib/libc/stdlib/mlock.c b/newlib/libc/stdlib/mlock.c
-index 888c986..43e5e39 100644
---- a/newlib/libc/stdlib/mlock.c
-+++ b/newlib/libc/stdlib/mlock.c
-@@ -1,4 +1,3 @@
--#ifndef MALLOC_PROVIDED
- /*
- FUNCTION
- <<__malloc_lock>>, <<__malloc_unlock>>---lock malloc pool
-@@ -60,5 +59,3 @@ __malloc_unlock (ptr)
-   __lock_release_recursive (__malloc_lock_object);
- #endif
- }
--
--#endif
diff --git a/dist/tools/toolchains/patches/newlib-2.2.0.20150623-RIOT-i586-none-elf.patch b/dist/tools/toolchains/patches/newlib-2.2.0.20150623-RIOT-i586-none-elf.patch
deleted file mode 100644
index 4500d66b43..0000000000
--- a/dist/tools/toolchains/patches/newlib-2.2.0.20150623-RIOT-i586-none-elf.patch
+++ /dev/null
@@ -1,451 +0,0 @@
-diff --git a/newlib-2.2.0.20150623/libgloss/arm/_exit.c b/newlib-2.2.0.20150623/libgloss/arm/_exit.c
-index ed00876..9c59b23 100644
---- a/newlib-2.2.0.20150623/libgloss/arm/_exit.c
-+++ b/newlib-2.2.0.20150623/libgloss/arm/_exit.c
-@@ -12,4 +12,5 @@ _exit (int status)
-      Note: The RDI implementation of _kill throws away both its
-      arguments.  */
-   _kill (status, -1);
-+  __builtin_unreachable ();
- }
-diff --git a/newlib-2.2.0.20150623/libgloss/i386/cygmon-gmon.c b/newlib-2.2.0.20150623/libgloss/i386/cygmon-gmon.c
-index 480b2ec..a4f615d 100644
---- a/newlib-2.2.0.20150623/libgloss/i386/cygmon-gmon.c
-+++ b/newlib-2.2.0.20150623/libgloss/i386/cygmon-gmon.c
-@@ -57,11 +57,12 @@
-  * should be.
-  */
-
-+#include <string.h>
-+
- #ifndef lint
- static char sccsid[] = "@(#)gmon.c	5.3 (Berkeley) 5/22/91";
- #endif /* not lint */
-
--#define DEBUG
- #ifdef DEBUG
- #include <stdio.h>
- #endif
-diff --git a/newlib-2.2.0.20150623/newlib/libc/include/stdio.h b/newlib-2.2.0.20150623/newlib/libc/include/stdio.h
-index 9d8fd86..9d1063f 100644
---- a/newlib-2.2.0.20150623/newlib/libc/include/stdio.h
-+++ b/newlib-2.2.0.20150623/newlib/libc/include/stdio.h
-@@ -645,36 +645,7 @@ _ELIDABLE_INLINE int __sgetc_r(struct _reent *__ptr, FILE *__p)
- #define __sgetc_r(__ptr, __p) __sgetc_raw_r(__ptr, __p)
- #endif
-
--#ifdef _never /* __GNUC__ */
--/* If this inline is actually used, then systems using coff debugging
--   info get hopelessly confused.  21sept93 rich@cygnus.com.  */
--_ELIDABLE_INLINE int __sputc_r(struct _reent *_ptr, int _c, FILE *_p) {
--	if (--_p->_w >= 0 || (_p->_w >= _p->_lbfsize && (char)_c != '\n'))
--		return (*_p->_p++ = _c);
--	else
--		return (__swbuf_r(_ptr, _c, _p));
--}
--#else
--/*
-- * This has been tuned to generate reasonable code on the vax using pcc
-- */
--#define       __sputc_raw_r(__ptr, __c, __p) \
--	(--(__p)->_w < 0 ? \
--		(__p)->_w >= (__p)->_lbfsize ? \
--			(*(__p)->_p = (__c)), *(__p)->_p != '\n' ? \
--				(int)*(__p)->_p++ : \
--				__swbuf_r(__ptr, '\n', __p) : \
--			__swbuf_r(__ptr, (int)(__c), __p) : \
--		(*(__p)->_p = (__c), (int)*(__p)->_p++))
--#ifdef __SCLE
--#define __sputc_r(__ptr, __c, __p) \
--        ((((__p)->_flags & __SCLE) && ((__c) == '\n')) \
--          ? __sputc_raw_r(__ptr, '\r', (__p)) : 0 , \
--        __sputc_raw_r((__ptr), (__c), (__p)))
--#else
--#define __sputc_r(__ptr, __c, __p) __sputc_raw_r(__ptr, __c, __p)
--#endif
--#endif
-+int _EXFUN(__sputc_r, (struct _reent *, int, FILE *));
-
- #define	__sfeof(p)	((int)(((p)->_flags & __SEOF) != 0))
- #define	__sferror(p)	((int)(((p)->_flags & __SERR) != 0))
-@@ -693,17 +664,6 @@ _ELIDABLE_INLINE int __sputc_r(struct _reent *_ptr, int _c, FILE *_p) {
- #endif /* __BSD_VISIBLE */
- #endif /* _REENT_SMALL */
-
--#if 0 /*ndef __STRICT_ANSI__ - FIXME: must initialize stdio first, use fn */
--#define	fileno(p)	__sfileno(p)
--#endif
--
--#ifndef __CYGWIN__
--#ifndef lint
--#define	getc(fp)	__sgetc_r(_REENT, fp)
--#define putc(x, fp)	__sputc_r(_REENT, x, fp)
--#endif /* lint */
--#endif /* __CYGWIN__ */
--
- #ifndef __STRICT_ANSI__
- /* fast always-buffered version, true iff error */
- #define	fast_putc(x,p) (--(p)->_w < 0 ? \
-@@ -717,14 +677,6 @@ _ELIDABLE_INLINE int __sputc_r(struct _reent *_ptr, int _c, FILE *_p) {
-
- #endif /* !__CUSTOM_FILE_IO__ */
-
--#define	getchar()	getc(stdin)
--#define	putchar(x)	putc(x, stdout)
--
--#ifndef __STRICT_ANSI__
--#define	getchar_unlocked()	getc_unlocked(stdin)
--#define	putchar_unlocked(x)	putc_unlocked(x, stdout)
--#endif
--
- _END_STD_C
-
- #endif /* _STDIO_H */
-diff --git a/newlib-2.2.0.20150623/newlib/libc/stdio/putc.c b/newlib-2.2.0.20150623/newlib/libc/stdio/putc.c
-index 2b1fd1b..f64925e 100644
---- a/newlib-2.2.0.20150623/newlib/libc/stdio/putc.c
-+++ b/newlib-2.2.0.20150623/newlib/libc/stdio/putc.c
-@@ -89,6 +89,13 @@ static char sccsid[] = "%W% (Berkeley) %G%";
-
- #undef putc
-
-+int __sputc_r(struct _reent *_ptr, int _c, FILE *_p) {
-+    if (--_p->_w >= 0 || (_p->_w >= _p->_lbfsize && (char)_c != '\\n'))
-+        return (*_p->_p++ = _c);
-+    else
-+        return (__swbuf_r(_ptr, _c, _p));
-+}
-+
- int
- _DEFUN(_putc_r, (ptr, c, fp),
-        struct _reent *ptr _AND
-diff --git a/newlib-2.2.0.20150623/newlib/libc/stdlib/mallocr.c b/newlib-2.2.0.20150623/newlib/libc/stdlib/mallocr.c
-index ecc445f..c9f5a00 100644
---- a/newlib-2.2.0.20150623/newlib/libc/stdlib/mallocr.c
-+++ b/newlib-2.2.0.20150623/newlib/libc/stdlib/mallocr.c
-@@ -1,6 +1,3 @@
--#ifdef MALLOC_PROVIDED
--int _dummy_mallocr = 1;
--#else
- /* ---------- To make a malloc.h, start cutting here ------------ */
-
- /*
-@@ -381,11 +378,7 @@ extern void __malloc_unlock();
-
- */
-
--#if DEBUG
--#include <assert.h>
--#else
- #define assert(x) ((void)0)
--#endif
-
-
- /*
-@@ -1761,141 +1754,6 @@ extern unsigned long max_mmapped_mem;
-   Debugging support
- */
-
--#if DEBUG
--
--
--/*
--  These routines make a number of assertions about the states
--  of data structures that should be true at all times. If any
--  are not true, it's very likely that a user program has somehow
--  trashed memory. (It's also possible that there is a coding error
--  in malloc. In which case, please report it!)
--*/
--
--#if __STD_C
--static void do_check_chunk(mchunkptr p)
--#else
--static void do_check_chunk(p) mchunkptr p;
--#endif
--{
--  INTERNAL_SIZE_T sz = p->size & ~PREV_INUSE;
--
--  /* No checkable chunk is mmapped */
--  assert(!chunk_is_mmapped(p));
--
--  /* Check for legal address ... */
--  assert((char*)p >= sbrk_base);
--  if (p != top)
--    assert((char*)p + sz <= (char*)top);
--  else
--    assert((char*)p + sz <= sbrk_base + sbrked_mem);
--
--}
--
--
--#if __STD_C
--static void do_check_free_chunk(mchunkptr p)
--#else
--static void do_check_free_chunk(p) mchunkptr p;
--#endif
--{
--  INTERNAL_SIZE_T sz = p->size & ~PREV_INUSE;
--  mchunkptr next = chunk_at_offset(p, sz);
--
--  do_check_chunk(p);
--
--  /* Check whether it claims to be free ... */
--  assert(!inuse(p));
--
--  /* Unless a special marker, must have OK fields */
--  if ((long)sz >= (long)MINSIZE)
--  {
--    assert((sz & MALLOC_ALIGN_MASK) == 0);
--    assert(aligned_OK(chunk2mem(p)));
--    /* ... matching footer field */
--    assert(next->prev_size == sz);
--    /* ... and is fully consolidated */
--    assert(prev_inuse(p));
--    assert (next == top || inuse(next));
--
--    /* ... and has minimally sane links */
--    assert(p->fd->bk == p);
--    assert(p->bk->fd == p);
--  }
--  else /* markers are always of size SIZE_SZ */
--    assert(sz == SIZE_SZ);
--}
--
--#if __STD_C
--static void do_check_inuse_chunk(mchunkptr p)
--#else
--static void do_check_inuse_chunk(p) mchunkptr p;
--#endif
--{
--  mchunkptr next = next_chunk(p);
--  do_check_chunk(p);
--
--  /* Check whether it claims to be in use ... */
--  assert(inuse(p));
--
--  /* ... and is surrounded by OK chunks.
--    Since more things can be checked with free chunks than inuse ones,
--    if an inuse chunk borders them and debug is on, it's worth doing them.
--  */
--  if (!prev_inuse(p))
--  {
--    mchunkptr prv = prev_chunk(p);
--    assert(next_chunk(prv) == p);
--    do_check_free_chunk(prv);
--  }
--  if (next == top)
--  {
--    assert(prev_inuse(next));
--    assert(chunksize(next) >= MINSIZE);
--  }
--  else if (!inuse(next))
--    do_check_free_chunk(next);
--
--}
--
--#if __STD_C
--static void do_check_malloced_chunk(mchunkptr p, INTERNAL_SIZE_T s)
--#else
--static void do_check_malloced_chunk(p, s) mchunkptr p; INTERNAL_SIZE_T s;
--#endif
--{
--  INTERNAL_SIZE_T sz = p->size & ~PREV_INUSE;
--  long room = long_sub_size_t(sz, s);
--
--  do_check_inuse_chunk(p);
--
--  /* Legal size ... */
--  assert((long)sz >= (long)MINSIZE);
--  assert((sz & MALLOC_ALIGN_MASK) == 0);
--  assert(room >= 0);
--  assert(room < (long)MINSIZE);
--
--  /* ... and alignment */
--  assert(aligned_OK(chunk2mem(p)));
--
--
--  /* ... and was allocated at front of an available chunk */
--  assert(prev_inuse(p));
--
--}
--
--
--#define check_free_chunk(P)  do_check_free_chunk(P)
--#define check_inuse_chunk(P) do_check_inuse_chunk(P)
--#define check_chunk(P) do_check_chunk(P)
--#define check_malloced_chunk(P,N) do_check_malloced_chunk(P,N)
--#else
--#define check_free_chunk(P)
--#define check_inuse_chunk(P)
--#define check_chunk(P)
--#define check_malloced_chunk(P,N)
--#endif
--
-
-
- /*
-@@ -2126,7 +1984,7 @@ static mchunkptr mremap_chunk(p, new_size) mchunkptr p; size_t new_size;
-
-
-
--#ifdef DEFINE_MALLOC
-+#if defined (DEFINE_MALLOC) && !defined (MALLOC_PROVIDED)
-
- /*
-   Extend the top-most chunk by obtaining memory from system.
-@@ -3275,99 +3133,7 @@ void cfree(mem) Void_t *mem;
- #endif
-
- #endif /* DEFINE_CFREE */
--
--#ifdef DEFINE_FREE
--
--/*
--
--    Malloc_trim gives memory back to the system (via negative
--    arguments to sbrk) if there is unused memory at the `high' end of
--    the malloc pool. You can call this after freeing large blocks of
--    memory to potentially reduce the system-level memory requirements
--    of a program. However, it cannot guarantee to reduce memory. Under
--    some allocation patterns, some large free blocks of memory will be
--    locked between two used chunks, so they cannot be given back to
--    the system.
--
--    The `pad' argument to malloc_trim represents the amount of free
--    trailing space to leave untrimmed. If this argument is zero,
--    only the minimum amount of memory to maintain internal data
--    structures will be left (one page or less). Non-zero arguments
--    can be supplied to maintain enough trailing space to service
--    future expected allocations without having to re-obtain memory
--    from the system.
--
--    Malloc_trim returns 1 if it actually released any memory, else 0.
--
--*/
--
--#if __STD_C
--int malloc_trim(RARG size_t pad)
--#else
--int malloc_trim(RARG pad) RDECL size_t pad;
--#endif
--{
--  long  top_size;        /* Amount of top-most memory */
--  long  extra;           /* Amount to release */
--  char* current_brk;     /* address returned by pre-check sbrk call */
--  char* new_brk;         /* address returned by negative sbrk call */
--
--  unsigned long pagesz = malloc_getpagesize;
--
--  MALLOC_LOCK;
--
--  top_size = chunksize(top);
--  extra = ((top_size - pad - MINSIZE + (pagesz-1)) / pagesz - 1) * pagesz;
-
--  if (extra < (long)pagesz)  /* Not enough memory to release */
--  {
--    MALLOC_UNLOCK;
--    return 0;
--  }
--
--  else
--  {
--    /* Test to make sure no one else called sbrk */
--    current_brk = (char*)(MORECORE (0));
--    if (current_brk != (char*)(top) + top_size)
--    {
--      MALLOC_UNLOCK;
--      return 0;     /* Apparently we don't own memory; must fail */
--    }
--
--    else
--    {
--      new_brk = (char*)(MORECORE (-extra));
--
--      if (new_brk == (char*)(MORECORE_FAILURE)) /* sbrk failed? */
--      {
--        /* Try to figure out what we have */
--        current_brk = (char*)(MORECORE (0));
--        top_size = current_brk - (char*)top;
--        if (top_size >= (long)MINSIZE) /* if not, we are very very dead! */
--        {
--          sbrked_mem = current_brk - sbrk_base;
--          set_head(top, top_size | PREV_INUSE);
--        }
--        check_chunk(top);
--	MALLOC_UNLOCK;
--        return 0;
--      }
--
--      else
--      {
--        /* Success. Adjust top accordingly. */
--        set_head(top, (top_size - extra) | PREV_INUSE);
--        sbrked_mem -= extra;
--        check_chunk(top);
--	MALLOC_UNLOCK;
--        return 1;
--      }
--    }
--  }
--}
--
--#endif /* DEFINE_FREE */
-
- #ifdef DEFINE_MALLOC_USABLE_SIZE
-
-@@ -3397,11 +3163,6 @@ size_t malloc_usable_size(RARG mem) RDECL Void_t* mem;
-     if(!chunk_is_mmapped(p))
-     {
-       if (!inuse(p)) return 0;
--#if DEBUG
--      MALLOC_LOCK;
--      check_inuse_chunk(p);
--      MALLOC_UNLOCK;
--#endif
-       return chunksize(p) - SIZE_SZ;
-     }
-     return chunksize(p) - 2*SIZE_SZ;
-@@ -3419,9 +3180,6 @@ STATIC void malloc_update_mallinfo()
-   int i;
-   mbinptr b;
-   mchunkptr p;
--#if DEBUG
--  mchunkptr q;
--#endif
-
-   INTERNAL_SIZE_T avail = chunksize(top);
-   int   navail = ((long)(avail) >= (long)MINSIZE)? 1 : 0;
-@@ -3431,13 +3189,6 @@ STATIC void malloc_update_mallinfo()
-     b = bin_at(i);
-     for (p = last(b); p != b; p = p->bk)
-     {
--#if DEBUG
--      check_free_chunk(p);
--      for (q = next_chunk(p);
--           q < top && inuse(q) && (long)(chunksize(q)) >= (long)MINSIZE;
--           q = next_chunk(q))
--        check_inuse_chunk(q);
--#endif
-       avail += chunksize(p);
-       navail++;
-     }
-@@ -3697,4 +3448,3 @@ History:
-          structure of old version,  but most details differ.)
-
- */
--#endif
-diff --git a/newlib-2.2.0.20150623/newlib/libc/stdlib/mlock.c b/newlib-2.2.0.20150623/newlib/libc/stdlib/mlock.c
-index 888c986..43e5e39 100644
---- a/newlib-2.2.0.20150623/newlib/libc/stdlib/mlock.c
-+++ b/newlib-2.2.0.20150623/newlib/libc/stdlib/mlock.c
-@@ -1,4 +1,3 @@
--#ifndef MALLOC_PROVIDED
- /*
- FUNCTION
- <<__malloc_lock>>, <<__malloc_unlock>>---lock malloc pool
-@@ -60,5 +59,3 @@ __malloc_unlock (ptr)
-   __lock_release_recursive (__malloc_lock_object);
- #endif
- }
--
--#endif