Add support for clangd language server (#602)

Author: jgiannuzzi

.gitignore

@@ -9,3 +9,7 @@ packages
 # The solution files get generated by vcpkg on Windows
 # and by the C# Dev Kit within a dev container.
 *.sln
+
+# clangd language server support
+compile_commands.json
+.cache

CMakeLists.txt

@@ -11,6 +11,8 @@ if (UNIX AND NOT CMAKE_BUILD_TYPE)
 	set(CMAKE_BUILD_TYPE "Release" CACHE STRING "Specifies the build type on single-configuration generators" FORCE)
 endif ()
 
+set(CMAKE_EXPORT_COMPILE_COMMANDS true)
+
 set(CMAKE_DEBUG_POSTFIX d)
 set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${PROJECT_SOURCE_DIR}/bin/${VCPKG_TARGET_TRIPLET})
 set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${PROJECT_SOURCE_DIR}/bin/${VCPKG_TARGET_TRIPLET})

build_unix.sh

@@ -83,4 +83,8 @@ do
   build_dir=build/$triplet-$(tr A-Z a-z <<<$build_type)
   cmake -B $build_dir -S . -D VCPKG_TARGET_TRIPLET=$triplet -D CMAKE_TOOLCHAIN_FILE=$VCPKG_INSTALLATION_ROOT/scripts/buildsystems/vcpkg.cmake -D CMAKE_BUILD_TYPE=$build_type $options
   cmake --build $build_dir -j ${nproc}
-done
+  if [ "${build_type}" == "Debug" ]
+  then
+    ln -snf $build_dir/compile_commands.json .
+  fi
+done