Again, this is important so that everything finds the 32bit headers, even though the host OS is actually 64bit. You’ll note I’ve highlighted that host_arch is ia32. 'icu_gyp_path': 'tools/icu/icu-generic.gyp', First, download the source and put it in a directory to build things in. At the time of this writing, the newest supported Node.js release is 10.9.0, so we’ll build that. Now that we have everything installed, it’s time to set up the build. If you’re reading this in the future, you may well want to change this to “8”, or whatever gcc version your distribution defaults to. Take note that the “7” in packages such as gcc-7-multilib corresponds to the major version of the default installation of gcc on the host machine. This should get everything you need onto your system. First, we need to add the 32bit architecture to dpkg with the command On a standard 64bit installation of Ubuntu Bionic, we need to install some 32bit libraries as well as the ARM C and C++ compilers. We’ll see exactly what do to in the next few sections. The crux of the solution is that to cross compile for armhf, which is a 32bit architecture, from a 64bit Intel host, you need to install some 32bit Intel libraries and invoke the host compiler in 32bit mode. I’m going to spare you the yak shaving I had to go through to get this part sorted out, but if you want to read all about it, this bug report is where I’d start. Essentially, it can be tricky to get the needed header files where the various compilers need them to be in order for all of this to work. However, the sheer number of available compilers effectively creates its own set of issues. One of its greatest strengths is the amount of software that’s available for it, and cross compilers are no exception. Ubuntu has been my go-to Linux distribution for years now. Challenges With Cross Compiling on Ubuntu If it seems like you’re all set to cross compile at this point, you’re close to correct. They allow you to specify different compilers for the target and host architectures, in turn allowing the system to make the local executables runnable on the host machine. I wasn’t able to find much documentation about them, but the environment variablesĪll affect the build process. Built-in Cross Compiling Featuresĭue to the inability to build Node.js without having to run internal executables, the Node project gives us some tricks to help us out. Fortunately, the Node.js project has given us some other options. There are tools such as sbuild that make it easy to get around that problem, but they rely on emulation which makes the build process extremely slow again. Consequently, if you build those tools with a cross compiler for ARM and try to run them on the Intel machine they’re sitting on, the build fails at that point because of the architecture mismatch. As part of its own build process, Node.js makes some binaries that need to be executed along the way. Unfortunately, the situation with Node.js isn’t as straightforward. You install the relevant cross compiler(s), point them at your source code, and do something likeĪnd you should be good to go. I spent the better part of my Friday night figuring out exactly how to do it, so I thought I’d share what I learned so you don’t have to jump through all of the hoops I did. This is possible, but not as easy as I would have thought when using a recent 64bit Ubuntu system. It would be nicer if we could cross compile from a beefy Intel machine with the target being the ARM chips that are used in the Raspberry Pi. A clean build of a release from the 10.x line on a Raspberry Pi 3 takes around five hours. However, building Node.js for architectures other than Intel x86 or 圆4 can be very time-consuming. Over at NodeSource we package those builds up for Linux to make them easy to install. The Node Foundation publishes binary tarballs for a broad spectrum of target platforms. We can run it on our Macbooks locally, on full server grade systems, and on IoT devices with ease. Node.js is available for many different operating systems and architectures.
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