On Fri, 2021-10-15 at 14:26 +0800, ☂Josh Chia (謝任中) via Gcc-help wrote: > What is MCU? Microcontroller unit? What's the relationship to apt-get? > > The problem is just as the error message says. You can't build gcc without > an existing C compiler. Perhaps your real problem is getting "apt-get > install" to work, and not building gcc from scratch without an existing > compiler. https://help.ubuntu.com/community/AptGet/Offline -- Xi Ruoyao <xry111@xxxxxxxxxxxxxxxx> School of Aerospace Science and Technology, Xidian University