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Updated first batch of instructions for x86_64.
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‎plain-text/x86_64-chunks/000-Preparation‎

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# perform as root:
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export MLFS=/mnt/mlfs
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mkdir -pv $MLFS
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mkdir -v $MLFS/sources
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chmod -v a+wt $MLFS/sources
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#download sources + patches
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mkdir -v $MLFS/cross-tools
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mkdir -v $MLFS/tools
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ln -sv $MLFS/cross-tools /
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ln -sv $MLFS/tools /
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groupadd mlfs
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useradd -s /bin/bash -g mlfs -m -k /dev/null mlfs
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passwd mlfs
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chown -v mlfs $MLFS/cross-tools
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chown -v mlfs $MLFS/sources
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chown -v mlfs $MLFS/tools
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# Now run as mlfs user
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su - mlfs
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cat > ~/.bash_profile << "EOF"
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exec env -i HOME=$HOME TERM=$TERM PS1='\u:\w\n\$ ' /bin/bash
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EOF
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cat > ~/.bashrc << "EOF"
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set +h
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umask 022
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MLFS=/mnt/mlfs
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LC_ALL=POSIX
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PATH=/cross-tools/bin:/tools/bin:/bin:/usr/bin
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export MLFS LC_ALL MLFS_TGT PATH
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EOF
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source ~/.bash_profile
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#CFLAGS and CXXFLAGS must not be set during the building of cross-tools.
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unset CFLAGS
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unset CXXFLAGS
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cat >> ~/.bashrc << EOF
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unset CFLAGS
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unset CXXFLAGS
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EOF
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#Build Variables:
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export MLFS_HOST="$(echo $MACHTYPE | \
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sed "s/$(echo $MACHTYPE | cut -d- -f2)/cross/")"
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export MLFS_TARGET="x86_64-linux-musl"
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cat >> ~/.bashrc << EOF
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export MLFS_HOST="${MLFS_HOST}"
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export MLFS_TARGET="${MLFS_TARGET}"
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export MLFS_ARCH=x86
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export MLFS_CPU=x86-64
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EOF
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source ~/.bashrc
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# the next are done as mlfs user

‎plain-text/x86_64-chunks/001-Cross-Tools-Kernel_Headers‎

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# Cross-Tools: Kernel Headers
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# build & install as user mlfs
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make mrproper
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make ARCH=${MLFS_ARCH} headers_check
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make ARCH=${MLFS_ARCH} INSTALL_HDR_PATH=/cross-tools/${MLFS_TARGET} headers_install

‎plain-text/x86_64-chunks/002-Cross-Tools-Binutils‎

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# Cross-Tools: Binutils
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# Build and install as mlfs
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mkdir -v build && cd build
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../configure \
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--prefix=/cross-tools --target=${MLFS_TARGET} \
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--with-sysroot=/cross-tools/${MLFS_TARGET} \
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--disable-nls --disable-multilib \
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--disable-werror \
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--disable-ppl-version-check \
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--disable-cloog-version-check \
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--enable-deterministic-archives \
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--disable-compressed-debug-sections
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make configure-host
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make && make install

‎plain-text/x86_64-chunks/003-Cross-Tools-GCC-Static‎

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# Cross-Tools: GCC STATIC
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# Build and install as mlfs
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tar -xf ../mpfr-4.0.1.tar.xz
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mv -v mpfr-4.0.1 mpfr
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tar -xf ../gmp-6.1.2.tar.xz
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mv -v gmp-6.1.2 gmp
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tar -xf ../mpc-1.1.0.tar.gz
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mv -v mpc-1.1.0 mpc
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mkdir -v build && cd build
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../configure \
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--prefix=/cross-tools --build=${MLFS_HOST} \
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--host=${MLFS_HOST} --target=${MLFS_TARGET} \
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--with-sysroot=/cross-tools/${MLFS_TARGET} \
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--disable-nls --with-newlib --without-ppl \
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--without-cloog --disable-libmpx \
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--disable-libitm --disable-libvtv \
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--disable-libssp --disable-shared \
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--disable-libgomp --without-headers \
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--disable-threads --disable-multilib \
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--disable-libatomic --disable-libstdcxx \
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--disable-libmudflap --disable-libcilkrts \
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--enable-languages=c --disable-libquadmath \
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--disable-libsanitizer --with-arch=${MLFS_CPU} \
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--disable-decimal-float --enable-clocale=generic \
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--disable-gnu-indirect-function
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make all-gcc all-target-libgcc
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make install-gcc install-target-libgcc

‎plain-text/x86_64-chunks/004-Cross-Tools-Musl‎

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# Cross-Tools: Musl
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# Build and install as mlfs
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./configure \
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CROSS_COMPILE=${MLFS_TARGET}- \
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--prefix=/ \
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--target=${MLFS_TARGET}
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make && DESTDIR=/cross-tools make install
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mkdir -v /cross-tools/usr
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ln -sv ../include /cross-tools/usr/include

‎plain-text/x86_64-chunks/005-Cross-Tools-GCC-Final‎

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# Cross-Tools: GCC-8.2.0 Final
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# Build and install as mlfs
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tar -xf ../mpfr-4.0.1.tar.xz
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mv -v mpfr-4.0.1 mpfr
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tar -xf ../gmp-6.1.2.tar.xz
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mv -v gmp-6.1.2 gmp
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tar -xf ../mpc-1.1.0.tar.gz
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mv -v mpc-1.1.0 mpc
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# Apply patches [from void-linux]
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patch -Np0 -i ../gcc-8.2.0-void-0016-invalid_tls_model.diff
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patch -Np0 -i ../gcc-8.2.0-void-fix-cxxflags-passing.patch
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patch -Np0 -i ../gcc-8.2.0-void-fix-musl-execinfo.patch
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patch -Np0 -i ../gcc-8.2.0-void-no-stack_chk_fail_local.patch
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mkdir build && cd build
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AR=ar LDFLAGS="-Wl,-rpath,/cross-tools/lib" \
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../configure \
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--prefix=/cross-tools \
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--build=${MLFS_HOST} \
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--host=${MLFS_HOST} \
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--target=${MLFS_TARGET} \
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--disable-multilib \
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--with-sysroot=/cross-tools \
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--disable-nls \
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--enable-shared \
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--enable-languages=c,c++ \
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--enable-__cxa_atexit \
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--enable-c99 \
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--enable-long-long \
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--enable-threads=posix \
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--enable-clocale=generic \
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--enable-libstdcxx-time \
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--enable-checking=release \
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--enable-fully-dynamic-string \
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--disable-symvers \
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--disable-gnu-indirect-function \
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--disable-libmudflap \
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--disable-libsanitizer \
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--disable-libmpx \
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--disable-lto-plugin \
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--disable-libssp
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make AS_FOR_TARGET="${MLFS_TARGET}-as" \
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LD_FOR_TARGET="${MLFS_TARGET}-ld"
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make install

‎plain-text/x86_64-chunks/006-Cross-Tools-File‎

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# Cross-Tools: File
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# Build and install as mlfs
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./configure --prefix=/cross-tools
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make && make install
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# Optional: Backup cross-tools

‎plain-text/x86_64-chunks/007-Tool_Chain-Binutils_Pass1‎

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# Tool Chain: Binutils PASS 1 of 2
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# Build and install as mlfs
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export CC="${MLFS_TARGET}-gcc"
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export CXX="${MLFS_TARGET}-g++"
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export AR="${MLFS_TARGET}-ar"
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export AS="${MLFS_TARGET}-as"
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export RANLIB="${MLFS_TARGET}-ranlib"
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export LD="${MLFS_TARGET}-ld"
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export STRIP="${MLFS_TARGET}-strip"
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mkdir -v build && cd build
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../configure --prefix=/tools \
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--with-sysroot=$MLFS \
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--with-lib-path=/tools/lib \
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--build=${MLFS_HOST} \
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--host=${MLFS_TARGET} \
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--target=${MLFS_TARGET} \
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--disable-nls \
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--disable-werror
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make && make install
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make -C ld clean
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make -C ld LIB_PATH=/tools/lib
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cp -v ld/ld-new /tools/bin

‎plain-text/x86_64-chunks/008-Tool_Chain-GCC_Pass1‎

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# Tool Chain: GCC-8.2.0 PASS 1 of 2
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# Build and install as mlfs
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export CC="${MLFS_TARGET}-gcc"
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export CXX="${MLFS_TARGET}-g++"
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export AR="${MLFS_TARGET}-ar"
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export AS="${MLFS_TARGET}-as"
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export RANLIB="${MLFS_TARGET}-ranlib"
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export LD="${MLFS_TARGET}-ld"
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export STRIP="${MLFS_TARGET}-strip"
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tar -xf ../mpfr-4.0.1.tar.xz
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mv -v mpfr-4.0.1 mpfr
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tar -xf ../gmp-6.1.2.tar.xz
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mv -v gmp-6.1.2 gmp
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tar -xf ../mpc-1.1.0.tar.gz
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mv -v mpc-1.1.0 mpc
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patch -Np0 -i ../gcc-8.2.0-void-0016-invalid_tls_model.diff
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patch -Np0 -i ../gcc-8.2.0-void-fix-cxxflags-passing.patch
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patch -Np0 -i ../gcc-8.2.0-void-fix-musl-execinfo.patch
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patch -Np0 -i ../gcc-8.2.0-void-no-stack_chk_fail_local.patch
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#change the location of GCC's default dynamic linker to use the one installed in /tools
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for file in gcc/config/{linux,i386/linux{,64}}.h
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do
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cp -uv $file{,.orig}
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sed -e 's@/lib\(64\)\?\(32\)\?/ld@/tools&@g' \
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-e 's@/usr@/tools@g' $file.orig > $file
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echo '
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#undef STANDARD_STARTFILE_PREFIX_1
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#undef STANDARD_STARTFILE_PREFIX_2
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#define STANDARD_STARTFILE_PREFIX_1 "/tools/lib/"
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#define STANDARD_STARTFILE_PREFIX_2 ""' >> $file
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touch $file.orig
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done
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case $(uname -m) in
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x86_64)
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sed -e '/m64=/s/lib64/lib/' \
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-i.orig gcc/config/i386/t-linux64
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;;
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esac
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mkdir -v build && cd build
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../configure \
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--target=${MLFS_TARGET} \
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--build=${MLFS_HOST} \
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--host=${MLFS_TARGET} \
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--prefix=/tools \
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--with-sysroot=$MLFS \
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--with-newlib \
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--without-headers \
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--with-local-prefix=/tools \
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--with-native-system-header-dir=/tools/include \
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--disable-nls \
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--disable-shared \
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--disable-multilib \
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--disable-threads \
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--disable-libatomic \
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--disable-libgomp \
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--disable-libmpx \
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--disable-libquadmath \
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--disable-libssp \
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--disable-libvtv \
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--disable-libstdcxx \
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--enable-languages=c,c++ \
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--disable-libstdcxx-pch \
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--disable-symvers \
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--disable-libitm \
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--disable-gnu-indirect-function \
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--disable-libmudflap \
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--disable-libsanitizer \
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--disable-libcilkrts
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## Will not build unless $PATH is switched from /cross-tools/bin:/tools/bin:/bin:/usr/bin to
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## /bin:/usr/bin:/cross-tools/bin:/tools/bin
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export PATH=/bin:/usr/bin:/cross-tools/bin:/tools/bin
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make && make install
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export PATH=/cross-tools/bin:/tools/bin:/bin:/usr/bin

‎plain-text/x86_64-chunks/009-Tool_Chain-Kernel_Headers‎

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# Tool Chain: Kernel Headers
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# Build and install as mlfs
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make mrproper
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PATH=/bin:/usr/bin:/cross-tools/bin:/tools/bin \
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MLFS_ARCH=x86 make INSTALL_HDR_PATH=dest headers_install
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find dest/include \( -name .install -o -name ..install.cmd \) -delete
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#If not present
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#mkdir -v /tools/include
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cp -rv dest/include/* /tools/include

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