A couple of Microsoft engineers are contributing code to Google’s Chrome browser to help make it a native Windows on ARM application, as spotted by 9to5google.
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Windows 10 on ARM, Microsoft’s second attempt at creating a line of PCs that run on ARM processors, does something important that Windows RT, Microsoft’s first attempt, did not. It can run x86 programs in an emulator, greatly expanding the range of software that it can use. But this has a performance penalty, so where possible, it’s better to have native ARM applications.
One of the biggest sticking points here is Chrome; Google’s browser is the most widely used third-party application on Windows. While Chrome does of course run on ARM systems (both Android phones and Chrome OS laptops), it doesn’t currently compile properly as a Windows-on-ARM application. The contributions made by the Microsoft developers are addressing these various issues—adding ARM64 build targets, specifying the right compilers and Windows SDK versions, providing alternatives to x86-specific code, and so on.