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Sometimes I wanted/want just affirmation that what I think I know is true. I've been compiling my own OSes from source, from basically nothing for years. I just recently purchased a book that's an introduction to gcc/g++ simply to leave no stone unturned.
Without spiraling into a rant, there's a lot of partial/biased/wrong/wrong context being presented as truth out there. There's _a lot_ to the raw educational aspect of tech that google just can't hit 100% of the time
