Installation

$ sudo apt install build-essentials cmake libboost-python-dev

$ mkdir ~/LLVM ; cd ~/LLVM

$ mkdir gz ; cd gz

sources

$ wget -c \

required

llvm http://releases.llvm.org/6.0.0/llvm-6.0.0.src.tar.xz

# core source tree
$ cd ~/LLVM
$ xzcat ~/LLVM/gz/llvm-6.0.0.src.tar.xz | tar x

optional

compiler-rt http://releases.llvm.org/6.0.0/compiler-rt-6.0.0.src.tar.xz
# compiler-rt
$ cd ~/LLVM/llvm-6.0.0.src/projects
$ xzcat ~/LLVM/gz/compiler-rt-6.0.0.src.tar.xz | tar x
$ mv compiler-rt-6.0.0.src compiler-rt
clang http://releases.llvm.org/6.0.0/cfe-6.0.0.src.tar.xz
# clang
$ cd ~/LLVM/llvm-6.0.0.src/tools
$ xzcat ~/LLVM/gz/cfe-6.0.0.src.tar.xz | tar x
$ mv cfe-6.0.0.src clang
lld (linker)
lldb (debugger, better C++ support)
libs:
- libcxx/libcxxabi (C++11 Standard Library Support)
- linunwind (for platforms that do not have a system HP unwinder)
- openmp (parallel)
- polly (polyhedral optimizations)
clang-tools
- clang-tidy (C++ linter static analyzer, CERT only, no MISRA)
- clangd (IDE helper: source browser,..)
- clang-doc (automated docs generator, early state, use DoxyGen)

build

$ rm -rf ~/LLVM/build ; mkdir ~/LLVM/build ; cd ~/LLVM/build
$ cmake ~/LLVM/llvm-6.0.0.src \
    -DCMAKE_BUILD_TYPE=Release -DLLVM_INCLUDE_TESTS=NO \
    -DCMAKE_INSTALL_PREFIX=/usr/local \
    -DLLVM_EXPERIMENTAL_TARGETS_TO_BUILD=AVR -DLLVM_TARGETS_TO_BUILD="X86;ARM"
$ make -j4 && sudo make install

faster build

-DLLVM_PARALLEL_COMPILE_JOBS=4 \

-DCMAKE_BUILD_TYPE=Release -DCMAKE_C_FLAGS="-pipe -O0" -DCMAKE_CXX_FLAGS="-pipe -O0" \

extra options

    -DLLVM_DEFAULT_TARGET_TRIPLE=arm-none-eabi \
    -DCMAKE_INSTALL_PREFIX=/usr/local \
    -DCMAKE_INSTALL_PREFIX=$(HOME)/LLVM
-DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=/tmp/LLVM 
-DCMAKE_BUILD_TYPE=Debug -DCMAKE_C_FLAGS="-O0 -g" -DCMAKE_CXX_FLAGS="-O0 -g"
-DCMAKE_INSTALL_PREFIX=$(HOME)/LLVM/AVR