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+ Took some fairly significant changes, for one the kernel is no longer
relocated at the start of a boot, instead it sits wherever the user
decides the kernel should sit. Similarly, the initial kernel stack and
page table are stored within the binary, slightly bloating the size
but making it much safer to boot since there's really no chance of us
overwriting the fdt or initrd in memory.
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+ Compiling for size emits memcpy() calls after they've already been
removed by LTO, so add __used attribute to counteract this.
Newer versions of GCC seem to prefer `-flto=auto` to just `-flto`, so
use that.
printf format %d -> %ld
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+ First part generates deps.mk, second part reads it.
Allows us to use both bmake and gmake with the same makefiles.
Only drawback seems to be that the first makefile considers all
individual files as 'finished' targets, meaning that it's more
difficult to do something like
make kernel.elf
though I haven't found this to be an issue.
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