Tool chain setup for armhf (hardware floating point support)
https://wiki.debian.org/ArmHardFloatPort
armhf compiler on Debian Jessie
These packages did not make it into Jessie so you need to install them from the Debian Cross-toolchains repository. Create /etc/apt/sources.list.d/crosstools.list containing:
deb http://emdebian.org/tools/debian/ jessie main
You will need the archive key installed
curl http://emdebian.org/tools/debian/emdebian-toolchain-archive.key | sudo apt-key add -
Then install crossbuild-essential-armhf
sudo dpkg --add-architecture armhf
sudo apt-get update
sudo apt-get install crossbuild-essential-armhf
sudo dpkg --add-architecture i386
sudo apt-get update
sudo apt-get install libc6:i386 libncurses5:i386 libstdc++6:i386 zlib1g:i386
sudo apt-get install u-boot-tools
And install crossbuild-essential-aarch64(for ultraZed)
sudo dpkg --add-architecture arm64
sudo apt-get update
sudo apt-get install crossbuild-essential-arm64
Test
~$ ${CC}gcc --version
arm-linux-gnueabihf-gcc (crosstool-NG linaro-1.13.1-4.9-2014.09 - Linaro GCC 4.9-2014.09) 4.9.2 20140904 (prerelease)
Copyright (C) 2014 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
Compile a hello world
~$ ${CC}gcc main.c -o hello.elf
Copy the hello world in your board:
~$ scp hello.elf root@192.168.1.103:/root
~$ ssh root@192.168.1.103
microZed#
microZed# cd /root
microZed# ./hello.elf
When you are not sure if the elf was compiled with an armel or armhf toolchain you can test it as next: (https://blogs.oracle.com/jtc/entry/is_it_armhf_or_armel)
readelf -A /proc/self/exe | grep Tag_ABI_VFP_args
For checking the compiler
gcc -dumpmachine