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A shell script to download packages for, configure, build and install a GCC cross-compiler.
#! /bin/bash
set -e
trap 'previous_command=$this_command; this_command=$BASH_COMMAND' DEBUG
trap 'echo FAILED COMMAND: $previous_command' EXIT
#-------------------------------------------------------------------------------------------
# This script will download packages for, configure, build and install a GCC cross-compiler.
# Customize the variables (INSTALL_PATH, TARGET, etc.) to your liking before running.
# If you get an error and need to resume the script from some point in the middle,
# just delete/comment the preceding lines before running it again.
#
# See: http://preshing.com/20141119/how-to-build-a-gcc-cross-compiler
#-------------------------------------------------------------------------------------------
INSTALL_PATH=/opt/cross
TARGET=aarch64-linux
USE_NEWLIB=0
LINUX_ARCH=arm64
CONFIGURATION_OPTIONS="--disable-multilib" # --disable-threads --disable-shared
PARALLEL_MAKE=-j4
BINUTILS_VERSION=binutils-2.24
GCC_VERSION=gcc-4.9.2
LINUX_KERNEL_VERSION=linux-3.17.2
GLIBC_VERSION=glibc-2.20
MPFR_VERSION=mpfr-3.1.2
GMP_VERSION=gmp-6.0.0a
MPC_VERSION=mpc-1.0.2
ISL_VERSION=isl-0.12.2
CLOOG_VERSION=cloog-0.18.1
export PATH=$INSTALL_PATH/bin:$PATH
# Download packages
export http_proxy=$HTTP_PROXY https_proxy=$HTTP_PROXY ftp_proxy=$HTTP_PROXY
wget -nc https://ftp.gnu.org/gnu/binutils/$BINUTILS_VERSION.tar.gz
wget -nc https://ftp.gnu.org/gnu/gcc/$GCC_VERSION/$GCC_VERSION.tar.gz
if [ $USE_NEWLIB -ne 0 ]; then
wget -nc -O newlib-master.zip https://github.com/bminor/newlib/archive/master.zip || true
unzip -qo newlib-master.zip
else
wget -nc https://www.kernel.org/pub/linux/kernel/v3.x/$LINUX_KERNEL_VERSION.tar.xz
wget -nc https://ftp.gnu.org/gnu/glibc/$GLIBC_VERSION.tar.xz
fi
wget -nc https://ftp.gnu.org/gnu/mpfr/$MPFR_VERSION.tar.xz
wget -nc https://ftp.gnu.org/gnu/gmp/$GMP_VERSION.tar.xz
wget -nc https://ftp.gnu.org/gnu/mpc/$MPC_VERSION.tar.gz
wget -nc ftp://gcc.gnu.org/pub/gcc/infrastructure/$ISL_VERSION.tar.bz2
wget -nc ftp://gcc.gnu.org/pub/gcc/infrastructure/$CLOOG_VERSION.tar.gz
# Extract everything
for f in *.tar*; do tar xfk $f; done
# Make symbolic links
cd $GCC_VERSION
ln -sf `ls -1d ../mpfr-*/` mpfr
ln -sf `ls -1d ../gmp-*/` gmp
ln -sf `ls -1d ../mpc-*/` mpc
ln -sf `ls -1d ../isl-*/` isl
ln -sf `ls -1d ../cloog-*/` cloog
cd ..
# Step 1. Binutils
mkdir -p build-binutils
cd build-binutils
../$BINUTILS_VERSION/configure --prefix=$INSTALL_PATH --target=$TARGET $CONFIGURATION_OPTIONS
make $PARALLEL_MAKE
make install
cd ..
# Step 2. Linux Kernel Headers
if [ $USE_NEWLIB -eq 0 ]; then
cd $LINUX_KERNEL_VERSION
make ARCH=$LINUX_ARCH INSTALL_HDR_PATH=$INSTALL_PATH/$TARGET headers_install
cd ..
fi
# Step 3. C/C++ Compilers
mkdir -p build-gcc
cd build-gcc
if [ $USE_NEWLIB -ne 0 ]; then
NEWLIB_OPTION=--with-newlib
fi
../$GCC_VERSION/configure --prefix=$INSTALL_PATH --target=$TARGET --enable-languages=c,c++ $CONFIGURATION_OPTIONS $NEWLIB_OPTION
make $PARALLEL_MAKE all-gcc
make install-gcc
cd ..
if [ $USE_NEWLIB -ne 0 ]; then
# Steps 4-6: Newlib
mkdir -p build-newlib
cd build-newlib
../newlib-master/configure --prefix=$INSTALL_PATH --target=$TARGET $CONFIGURATION_OPTIONS
make $PARALLEL_MAKE
make install
cd ..
else
# Step 4. Standard C Library Headers and Startup Files
mkdir -p build-glibc
cd build-glibc
../$GLIBC_VERSION/configure --prefix=$INSTALL_PATH/$TARGET --build=$MACHTYPE --host=$TARGET --target=$TARGET --with-headers=$INSTALL_PATH/$TARGET/include $CONFIGURATION_OPTIONS libc_cv_forced_unwind=yes
make install-bootstrap-headers=yes install-headers
make $PARALLEL_MAKE csu/subdir_lib
install csu/crt1.o csu/crti.o csu/crtn.o $INSTALL_PATH/$TARGET/lib
$TARGET-gcc -nostdlib -nostartfiles -shared -x c /dev/null -o $INSTALL_PATH/$TARGET/lib/libc.so
touch $INSTALL_PATH/$TARGET/include/gnu/stubs.h
cd ..
# Step 5. Compiler Support Library
cd build-gcc
make $PARALLEL_MAKE all-target-libgcc
make install-target-libgcc
cd ..
# Step 6. Standard C Library & the rest of Glibc
cd build-glibc
make $PARALLEL_MAKE
make install
cd ..
fi
# Step 7. Standard C++ Library & the rest of GCC
cd build-gcc
make $PARALLEL_MAKE all
make install
cd ..
trap - EXIT
echo 'Success!'
@kanj
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kanj commented Apr 3, 2018

Amazing script. I was able to create a cross compiler for ARM, and then create a Kernel and BusyBox to boot up in QEMU. I have converted the script to a makefile under kanj/MAKE_CROSS_LINUX for reference.

@BetterCallBene
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BetterCallBene commented Apr 24, 2018

Very interesting script. On this basis, i create conan package https://github.com/BetterCallBene/conan-cgcc.

@kannaiah
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kannaiah commented Apr 15, 2020

Is it possible to build multi lib gcc i.e. with aarch64 and arm?

@Darkvater
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Darkvater commented May 29, 2020

This doesn't work for me trying to build gcc-4.8.5. It fails on configuring glibc (2.12.2) as it is using the newly built cross-compiled-gcc which cannot find stdio.h. I can resolve this by not exporting the PATH to the new binaries but then the csu binaries built will be for the host architecture. Not really sure how to resolve it.

@stahta01
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stahta01 commented Aug 8, 2020

Anyone trying to use something other than Linux as the build/host platform may be helped by looking at my fork of this script.
My Fork

I used MSys2 64 bit (a Cygwin fork) under Win7 64 bit; I yet to test the cross compiler produced; did it as a learning exercise.
I have no need to use it; but, likely will in a few months.

Edit2: Once, I deleted the installed files my version of the script stopped building with gcc/glibc errors.

Tim S.

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