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CMakeLists.txt
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CMakeLists.txt
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cmake_minimum_required(VERSION 3.1)
project(ccls LANGUAGES CXX)
list(APPEND CMAKE_MODULE_PATH ${CMAKE_SOURCE_DIR}/cmake/)
include(DefaultCMakeBuildType)
# Required Clang version
set(CLANG_VERSION 6.0.0 CACHE STRING "Clang version")
set(CLANG_DOWNLOAD_LOCATION ${CMAKE_BINARY_DIR}
CACHE STRING "Downloaded Clang location")
option(SYSTEM_CLANG "Use system installation of Clang instead of \
downloading Clang" OFF)
option(ASAN "Compile with address sanitizers" OFF)
option(CLANG_USE_BUNDLED_LIBC++ "Let Clang use bundled libc++" OFF)
option(USE_SHARED_LLVM "Link against libLLVM.so instead separate LLVM{Option,Support,...}" OFF)
# Sources for the executable are specified at end of CMakeLists.txt
add_executable(ccls "")
### Compile options
# CMake default compile flags:
# MSVC + Clang(Windows):
# debug: /MDd /Zi /Ob0 /Od /RTC1
# release: /MD /O2 /Ob2 /DNDEBUG
# GCC + Clang(Linux):
# debug: -g
# release: -O3 -DNDEBUG
# Enable C++17 (Required)
set_property(TARGET ccls PROPERTY CXX_STANDARD 17)
set_property(TARGET ccls PROPERTY CXX_STANDARD_REQUIRED ON)
# Disable gnu extensions except for Cygwin which needs them to build properly
if(NOT CYGWIN)
set_property(TARGET ccls PROPERTY CXX_EXTENSIONS OFF)
endif()
# To link against LLVM libraries (usually compiled with -fno-rtti)
target_compile_options(ccls PRIVATE -fno-rtti)
# CMake sets MSVC for both MSVC and Clang(Windows)
if(MSVC)
# Common MSVC/Clang(Windows) options
target_compile_options(ccls PRIVATE
/nologo
/EHsc
/W3 # roughly -Wall
/wd4996 # disable loguru unsafe warnings
/wd4722 # ignores warning C4722
# (destructor never returns) in loguru
/wd4267 # ignores warning C4267
# (conversion from 'size_t' to 'type'),
# roughly -Wno-sign-compare
/wd4800
$<$<CONFIG:Debug>:/FS>
)
else()
# Common GCC/Clang(Linux) options
target_compile_options(ccls PRIVATE
-Wall
-Wno-sign-compare
)
if(${CMAKE_CXX_COMPILER_ID} STREQUAL GNU)
target_compile_options(ccls PRIVATE -Wno-return-type -Wno-unused-result)
endif()
if(${CMAKE_CXX_COMPILER_ID} STREQUAL Clang)
target_compile_options(ccls PRIVATE
$<$<CONFIG:Debug>:-fno-limit-debug-info>)
endif()
if(ASAN)
target_compile_options(ccls PRIVATE -fsanitize=address,undefined)
# target_link_libraries also takes linker flags
target_link_libraries(ccls PRIVATE -fsanitize=address,undefined)
endif()
endif()
### Download Clang if required
if(NOT SYSTEM_CLANG)
message(STATUS "Using downloaded Clang")
include(DownloadAndExtractClang)
download_and_extract_clang(${CLANG_VERSION} ${CLANG_DOWNLOAD_LOCATION})
# Used by FindClang
set(CLANG_ROOT ${DOWNLOADED_CLANG_DIR})
if(${CMAKE_CXX_COMPILER_ID} STREQUAL Clang AND CLANG_USE_BUNDLED_LIBC++)
message(STATUS "Using bundled libc++")
target_compile_options(ccls PRIVATE -nostdinc++ -cxx-isystem ${CLANG_ROOT}/include/c++/v1)
if(${CMAKE_SYSTEM_NAME} STREQUAL Linux)
# Don't use -stdlib=libc++ because while ccls is linked with libc++, bundled clang+llvm require libstdc++
target_link_libraries(ccls PRIVATE -L${CLANG_ROOT}/lib c++ c++abi)
# FreeBSD defaults to -stdlib=libc++ and uses system libcxxrt.a
endif()
endif()
else()
message(STATUS "Using system Clang")
endif()
### Libraries
# See cmake/FindClang.cmake
find_package(Clang ${CLANG_VERSION} REQUIRED)
target_link_libraries(ccls PRIVATE Clang::Clang)
# Enable threading support
set(THREADS_PREFER_PTHREAD_FLAG ON)
find_package(Threads REQUIRED)
target_link_libraries(ccls PRIVATE Threads::Threads)
if(${CMAKE_SYSTEM_NAME} STREQUAL FreeBSD)
find_package(Backtrace REQUIRED)
target_link_libraries(ccls PRIVATE ${Backtrace_LIBRARIES})
# src/platform_posix.cc uses libthr
target_link_libraries(ccls PRIVATE thr)
endif()
### Definitions
target_compile_definitions(ccls PRIVATE
DEFAULT_RESOURCE_DIRECTORY="${Clang_RESOURCE_DIR}")
### Includes
target_include_directories(ccls PRIVATE src)
target_include_directories(ccls SYSTEM PRIVATE
third_party
third_party/rapidjson/include)
### Install
install(TARGETS ccls RUNTIME DESTINATION bin)
# TODO: install libclang.dll on Windows as well
if(NOT SYSTEM_CLANG AND NOT ${CMAKE_SYSTEM_NAME} STREQUAL Windows)
if(${CMAKE_SYSTEM_NAME} MATCHES Linux|FreeBSD)
set_property(TARGET ccls APPEND PROPERTY
INSTALL_RPATH $ORIGIN/../lib)
elseif(${CMAKE_SYSTEM_NAME} STREQUAL Darwin)
set_property(TARGET ccls APPEND PROPERTY
INSTALL_RPATH @loader_path/../lib)
endif()
file(GLOB LIBCLANG_PLUS_SYMLINKS
${DOWNLOADED_CLANG_DIR}/lib/libclang.[so,dylib]*)
install(FILES ${LIBCLANG_PLUS_SYMLINKS} DESTINATION lib)
endif()
# Allow running from build Windows by copying libclang.dll to build directory
if(NOT SYSTEM_CLANG AND ${CMAKE_SYSTEM_NAME} STREQUAL Windows)
add_custom_command(TARGET ccls
POST_BUILD
COMMAND ${CMAKE_COMMAND} -E copy
${DOWNLOADED_CLANG_DIR}/bin/libclang.dll
$<TARGET_FILE_DIR:ccls>
COMMENT "Copying libclang.dll to build directory ...")
endif()
### Tools
# We use glob here since source files are already manually added with
# target_sources further down
file(GLOB SOURCES src/*.cc src/*.h src/serializers/*.cc src/serializers/*.h
src/messages/*.h src/messages/*.cc)
### Sources
target_sources(ccls PRIVATE third_party/siphash.cc)
target_sources(ccls PRIVATE
src/clang_complete.cc
src/clang_tu.cc
src/clang_utils.cc
src/config.cc
src/file_consumer.cc
src/filesystem.cc
src/fuzzy_match.cc
src/main.cc
src/include_complete.cc
src/indexer.cc
src/method.cc
src/language.cc
src/log.cc
src/lsp.cc
src/match.cc
src/message_handler.cc
src/pipeline.cc
src/platform_posix.cc
src/platform_win.cc
src/position.cc
src/project.cc
src/query_utils.cc
src/query.cc
src/serializer.cc
src/test.cc
src/utils.cc
src/working_files.cc)
target_sources(ccls PRIVATE
src/messages/ccls_base.cc
src/messages/ccls_callHierarchy.cc
src/messages/ccls_callers.cc
src/messages/ccls_fileInfo.cc
src/messages/ccls_freshenIndex.cc
src/messages/ccls_inheritanceHierarchy.cc
src/messages/ccls_memberHierarchy.cc
src/messages/ccls_vars.cc
src/messages/exit.cc
src/messages/initialize.cc
src/messages/shutdown.cc
src/messages/textDocument_codeAction.cc
src/messages/textDocument_codeLens.cc
src/messages/textDocument_completion.cc
src/messages/textDocument_definition.cc
src/messages/textDocument_didChange.cc
src/messages/textDocument_didClose.cc
src/messages/textDocument_didOpen.cc
src/messages/textDocument_didSave.cc
src/messages/textDocument_documentHighlight.cc
src/messages/textDocument_documentSymbol.cc
src/messages/textDocument_hover.cc
src/messages/textDocument_implementation.cc
src/messages/textDocument_references.cc
src/messages/textDocument_rename.cc
src/messages/textDocument_signatureHelp.cc
src/messages/textDocument_typeDefinition.cc
src/messages/workspace_didChangeConfiguration.cc
src/messages/workspace_didChangeWatchedFiles.cc
src/messages/workspace_symbol.cc
)