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51 lines
2.7 KiB
51 lines
2.7 KiB
7 years ago
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1. NOTE: These instructions use ~/.local/llvm_$(opam config var switch) as an install root for llvm/clang, but installing elsewhere should be fine. Also note that you probably don't want to use this clang for anything else because it is a default debug build and hence very slow. So some PATH management is likely needed to have ~/.local/llvm_$(opam config var switch) in PATH only when building / running llair. This is done automatically for the targets in test/Makefile.
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2. clone llvm, clang, and libcxxabi
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- cd ~/path/to/sledge
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- git clone git+ssh://git@github.com/jberdine/llvm.git --branch ocaml_api
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- git clone https://github.com/llvm-mirror/clang.git llvm/tools/clang
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- git clone https://github.com/llvm-mirror/libcxxabi.git llvm/projects/libcxxabi
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3. build llvm & clang
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- brew install cmake ninja
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- cd ~/path/to/sledge/llvm
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- mkdir _build
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- cd _build
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- cmake -G Ninja -DCMAKE_INSTALL_PREFIX=~/.local/llvm_$(opam config var switch) -DLLVM_OCAML_INSTALL_PATH=~/.local/llvm_$(opam config var switch)/lib/ocaml ..
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- ninja -j8
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- ninja ocaml_doc
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- ninja install
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4. install deps
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- add ~/.local/llvm_$(opam config var switch)/bin to shell PATH
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+ because installing the opam package for llvm will look for it
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+ export PATH=~/.local/llvm_$(opam config var switch)/bin:$PATH
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- pin conf-llvm
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+ opam pin add -n conf-llvm --dev
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+ opam pin edit conf-llvm
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- edit version number to match that of the llvm clone (= 7.0.0)
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- pin llvm
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+ cd ~/path/to/sledge/llvm
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+ opam pin add -n -k git llvm .
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+ opam pin edit llvm
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- edit llvm and conf-llvm version number to match that of the llvm clone (= 7.0.0)
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- when prompted, ok to save new opam file
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5. hush `ld: warning: directory not found for option '-L/opt/local/lib'`
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- the zarith package adds a spurious linker option unless you have both brew and macports, so if you see this linker warning when compiling, execute
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+ sudo mkdir -p /opt/local/lib
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6. install dev tools
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- opam install merlin ocp-indent tuareg user-setup
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- install ocamlformat
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7. if needed: point new clang to xcode c++ lib
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- cd ~/.local/llvm_$(opam config var switch)/include
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- ln -s /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include/c++ .
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8. llvm dev workflow
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- modify llvm sources
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- cd ~/path/to/sledge/llvm/_build; ninja -j8
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- iterate
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- (optional?) git add -u; git commit -m ...
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- ninja -j8 && ninja ocaml_doc && ninja install && opam upgrade llvm
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- cd ~/path/to/sledge; make
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- it is not uncommon to get "inconsistent assumptions" errors: clean and re-make
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9. llvm emacs mode
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- (add-to-list 'load-path (expand-file-name "~/path/to/sledge/llvm/utils/emacs"))
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- (require 'llvm-mode)
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- (require 'autodisass-llvm-bitcode)
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