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[Older] HOWTO Install required packages on the Host for SEALS
UPDATE- The info here's mostly superseded by the 'SEALS Howto' wiki page.
Setting up your system to try out the SEALS project (in a nutshell, allowing one to build a “skeletal” ARM/Linux kernel and root filesystem emulated using Qemu):
- x86-to-ARM Linaro toolchain
- Kernel configuration menu : libncurses5-dev
- Busybox (see http://busybox.net )
- mkfs.ext4
- Qemu for ARM
Having the versatile 'strace' on-board is always helpful! Finally, have found a website that describes how to successfully cross-compile this elusive little utility for ARM! Here it is: Cross compiling for ARM with Ubuntu 16.04 LTS
Have used it on Fedora 28 with the Linaro toolchain (see below) and all went well.
[UPDATE: Apr2022: the download links provided earlier) for the Mentor Graphics toolchain do not work any longer. Thus, we show how to install the toolchain ].
NOTE- often, folks install a toolchain using the distro's package management software (like apt, dnf or yum). Well, that does install a basic toolchain but I find that it's incomplete in an important aspect: the toolchain 'sysroot' libraries, sbin and usr components!
For this reason, I strongly suggest you don't take the shortcut and just install a toolchain via the package manager; rather, follow the steps below to properly install the Linaro x86-to-ARM GNU EABI5 toolchain on Linux:
The links provided below are representative; they're fine as of this writing (Feb 2022) but may change in future.
Update: location for ARM Toolchain download
ARM Toolchain download, from the ARM GNU Toolchain Downloads page
Navigate to the above URL, scroll down to the section labelled x86_64 Linux hosted cross toolchains and download the latest stable version of the AArch32 GNU/Linux target with hard float (arm-none-linux-gnueabihf) toolchain:
gcc-arm-w.x.y-x86_64-arm-none-linux-gnueabihf.tar.xz (you can do so with wget <url>).
Steps after downloading:
-
Extract the above
gcc-arm-w.x.y-x86_64-arm-none-linux-gnueabihf.tar.xzfile (I extracted them into my ~/Downloads dir) -
Then, in the SEAL's build.config file:
2.1 set the
CXXvariable to the toolchain prefix (usuallyarm-none-linux-gnueabihf-)2.2 set the
CXX_LOCvariable to the download location on your disk.
[FYI, other good resources on Toolchains:
For the installs performed below, and in general, it's a good idea to first determine
if your network requires to go through a proxy to access the distro's software repositories.
Also do a
sudo apt-get update
first.
NOTE Specifying an incorrect kernel configuration often results in the kernel (qemu) hanging very early
at boot. So getting the kernel config right is critical. Hence, to help the user, we provide a working sample
kernel config file (for kernel ver 4.14.52) here: doc/kconfig_4.14.52. One could use this as a base.
Support to display the curses-based menu used in 'make menuconfig' requires the installation of certain headers:
sudo apt-get install libncurses5-dev
Qemu for ARM
sudo apt-get install qemu-system-arm