Spacemacs LSP for C++

README.md

Setting up Spacemacs for C/C++ Dev

Install CCLS

See included install-ccls.sh.

1. Install dependencies: sudo apt install clang-9 libclang-9-dev rapidjson-dev zlib1g-dev libncurses-dev
2. Download archived CCLS source from github release page: Releases-MaskRay/ccls
3. Unarchive: tar -xzf ccls-0.20210330.tar.gz
4. CMake build: cmake -H. -BRelease -DCMAKE_BUILD_TYPE=Release -DCMAKE_PREFIX_PATH=/usr/lib/llvm-9 -DLLVM_INCLUDE_DIR=/usr/lib/llvm-9/include -DLLVM_BUILD_INCLUDE_DIR=/usr/include/llvm-9/
5. CMake install: sudo cmake --build Release

Enable appropriate configuration layers

(c-c++ :variables c-c++-backend 'lsp-ccls)
cmake
lsp

Create Compilation Database (compile_commands.json) for C/C++ Project

If using CMake, add -DCMAKE_EXPORT_COMPILE_COMMANDS=1 to your cmake build command and then copy the resulting compile_commands.json file from the build directory to your source or project directory.

If using Make directly, use a tool like Bear: bear make or bear make build

install-ccls.sh

#!/bin/bash

sudo apt install clang-9 libclang-9-dev rapidjson-dev zlib1g-dev libncurses-dev

pushd ~/Downloads

wget https://github.com/MaskRay/ccls/archive/refs/tags/0.20210330.tar.gz -O ./ccls-0.20210330.tar.gz
tar -xzf ccls-0.20210330.tar.gz

pushd ccls-0.20210330

cmake -H. -BRelease -DCMAKE_BUILD_TYPE=Release -DCMAKE_PREFIX_PATH=/usr/lib/llvm-9 -DLLVM_INCLUDE_DIR=/usr/lib/llvm-9/include -DLLVM_BUILD_INCLUDE_DIR=/usr/include/llvm-9/
sudo cmake --build Release --target install

popd # out of ccls source directory
popd # out of ~/Downloads directory

spacemacs-snippet.el

(setq-default
 dotspacemacs-configuration-layers
 '(
   (c-c++ :variables c-c++-backend 'lsp-ccls)
   cmake
   lsp
   )))