rktrlng / arm-toolchain-build-scripts

Scripts for building a gcc-based ARM toolchain on Linux. Based on YAGARTO build scripts by Michael Fischer.

ARM toolchain build scripts

Scripts for building a gcc-based ARM toolchain on Linux (target=arm-none-eabi) for building for the Cortex-M4 line of ARM processors, using hardware floating point instructions and calling conventions.

Based almost entirely on YAGARTO build scripts by Michael Fischer:

• home: http://www.yagarto.org/
• source: http://sourceforge.net/projects/yagarto/

The target is arm-none-eabi, and gcc is built with the following multilibs (arm-none-eabi-gcc --print-multi-lib):

.;
thumb;@mthumb
thumb/thumb2;@mthumb@march=armv7
thumb/armv6-m;@mthumb@march=armv6-m
thumb/cortex-m4/float-abi-hard/fpuv4-sp-d16;@mthumb@mcpu=cortex-m4@mfloat-abi=hard@mfpu=fpv4-sp-d16

When building your programs the CFLAGS you want are:

-mthumb -mcpu=cortex-m4 -mfloat-abi=hard -mfpu=fpv4-sp-d16

You may also want:

-mthumb-interwork -mlittle-endian

Build

Install required packages

• Debian: apt-get install build-essential automake bzip2 libtool gcc-multilib libncurses5-dev
• Raspbian: apt-get install bzip2 libtoollibncurses5-dev flex bison texlive
• CentOS: yum install gcc gcc-c++ make autoconf glibc-devel.i386 libstdc++-devel.i386 automake ncurses-devel

Download / extract scripts

• Set options for 32 or 64 bits in '_env-only.sh' (must match to host that does the cross compiling)
• Update version numbers in '_env-only.sh' as needed (see download/README.md)

Download src packages into download directory (or skip to the next step, and run './auto.sh')

• expat-2.0.1 http://sourceforge.net/projects/expat/files/expat/2.0.1/expat-2.0.1.tar.gz
• zlib-1.2.3 ftp://ftp.spline.inf.fu-berlin.de/pub/gentoo/distfiles/zlib-1.2.3.tar.bz2
• gmp-5.0.4 ftp://ftp.gmplib.org/pub/gmp-5.0.4/gmp-5.0.4.tar.bz2
• mpfr-2.4.2 http://www.mpfr.org/mpfr-2.4.2/mpfr-2.4.2.tar.bz2
• binutils-2.24 http://ftp.gnu.org/gnu/binutils/binutils-2.24.tar.bz2
• gcc-4.8.2 ftp://sources.redhat.com/pub/gcc/releases/gcc-4.8.2/gcc-4.8.2.tar.bz2
• newlib-1.20.0 ftp://sources.redhat.com/pub/newlib/newlib-1.20.0.tar.gz
• gdb-7.6.2 ftp://sources.redhat.com/pub/gdb/releases/gdb-7.6.2.tar.bz2
• mpc-1.0.1 http://www.multiprecision.org/mpc/download/mpc-1.0.1.tar.gz

Run "./xx-build-all.sh" (or "./auto.sh" to download sources) to start the build

• Go make a snack and watch a movie, it's gonna take anywhere from 15 minutes to multiple hours.
• The build should be successfull if there's a file named "xx-ready.txt" and a numbered "-ready.txt" for each build script.
• 'xx-restart.sh' will delete all '*-build' directories and starts building from scratch.

Install

cd install
mkdir /opt/yagarto
cp -R * /opt/yagarto
export PATH=$PATH:/opt/yagarto/bin    #or add to your .profile or whatever

Uninstall

rm -rf /opt/yagarto

Credit

Credit goes to Michael Fischer (www.yagarto.org) for the original scripts.

Changes/tweaks by the following people:

caspencer (based on yagarto for Windows 20110429):

• removed the MinGW/MSYS-specific stuff
• fixed some things regarding how libgmp is built and referenced (forced 32-bit build)
• added .log files for each numbered build script

amour03:

• extra script for downloading
• updated versions of sources
• extra environment vars

rktrlng:

• scripts based on yagarto for OS X 20121222
• had to revert back to gmp-5.0.4 + mpfr-2.4.2 to get it to build on 64 bit (Ubuntu 13.10)
• gcc-4.8.2 and newlib-1.20.0 patches based on patches here: https://github.com/prattmic/arm-cortex-m4-hardfloat-toolchain