[cfe-dev] Porting to a new target

[Daniel Dilts]

>
>
>>  0. QEMU or some other emulator
>   Not an absolute must, but super useful if you don't real hardware yet,
> or your hardware doesn't have good debug support.
>
>  1. Compiler (Clang and LLVM)
>>
> 1.25 Linker
>   You could port ld, or lld.
> 1.5. Compiler runtimes (libgcc or compiler_rt).
>   For compiler_rt, you can probably skip the sanitizers in your first stab
> at it.  Save them for after you've got the regular bits working.
> 1.75 Debugger
>   Not an absolute must, but suuuuper useful.
>   Could port gdb, or lldb.
>
>> 2. C++ library (libc++)
>>
> Or libstdc++
>
>  3. C library (PDCLib?)
>> 4. ABI (libc++abi)
>>
> Or libcxxrt, or libsupc++.
> 5. Unwinder (sort of part of libc++abi, or libgcc_s)
>

I assume that an unwinder is related to stack unwinding when an exception
is thrown.  What does that require beyond what libc++abi supports?
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