O 25 Jan 2015, at 06:16, Yue Chen <ycyc...@gmail.com> wrote: > > When I use the original versions (even 3.4.1) of LLVM/Clang to compile > FreeBSD kernel, it always has problems. > > Since I need to modify something in LLVM source and then build the kernel, > where can I get the FreeBSD-friendly Clang/LLVM source code?
See the contrib/llvm/patches directory for the list of patches that you need to apply. Not all of these are strictly needed to compile just a kernel, but it is safest to just apply them all. For 3.4.1, you can use the set available here: https://svnweb.freebsd.org/base/stable/10/contrib/llvm/patches/ Alternatively, you can compile the kernel using: make buildkernel WERROR= MK_FORMAT_EXTENSIONS=no which should fix any errors that were emitted because of -Werror. -Dimitry
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