Ask a silly question.

Ask a silly question. -- Linux general technology-Linux programming and kernel information. The following is a detailed description. PS: I'm not a computer professional. It is indeed because I have been idle and interested in programming recently, so I want to see how the computer works.

This problem occurs when I read "write an operating system by myself. At that time, I was excited to write a boot sector which was compiled by nasm. I want to write nasm into a program that converts assembly code into machine commands. I was thinking, because nasm is still a program running in the operating system... Who compiled it? Likewise, who compiled gcc?

I have heard of a saying that these programs were first evolved from a simple compilation program. starting from this program, the compiled executable program continuously compiled and improved its own source code, in this way, new and more powerful players will be generated constantly... This seems amazing, and how did this first program come from?

Thank you!