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cmake: use {LLVM,Clang}Config.cmake

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Combined Daan De Meyer's #227 with other simplification

* USE_SHARED_LLVM is deleted in favor of LLVM_LINK_LLVM_DYLIB
* LLVM_ENABLE_RTTI is deleted as it is provided by LLVMConfig.cmake
* Only direct Clang/LLVM dependencies are required in target_link_libraries
* Restrict -DCLANG_RESOURCE_DIRECTORY= to src/utils.cc
This commit is contained in:
Fangrui Song 2019-03-09 19:45:37 -08:00
parent 5d27ac9f34
commit 7c70c0662f
4 changed files with 78 additions and 203 deletions
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110
CMakeLists.txt
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@ -1,39 +1,35 @@
cmake_minimum_required(VERSION 3.8) cmake_minimum_required(VERSION 3.8)
project(ccls LANGUAGES CXX) project(ccls LANGUAGES CXX)
list(APPEND CMAKE_MODULE_PATH ${CMAKE_SOURCE_DIR}/cmake/)
include(DefaultCMakeBuildType)
# Required Clang version
option(LLVM_ENABLE_RTTI "-fno-rtti if OFF. This should match LLVM libraries" OFF)
option(USE_SHARED_LLVM "Link against libLLVM.so instead separate LLVM{Option,Support,...}" OFF)
option(USE_SYSTEM_RAPIDJSON "Use system RapidJSON instead of the git submodule if exists" ON) option(USE_SYSTEM_RAPIDJSON "Use system RapidJSON instead of the git submodule if exists" ON)
# Sources for the executable are specified at end of CMakeLists.txt # Sources for the executable are specified at end of CMakeLists.txt
add_executable(ccls "") add_executable(ccls "")
### Compile options ### Default build type
# CMake default compile flags: set(DEFAULT_CMAKE_BUILD_TYPE Release)
# MSVC + Clang(Windows):
# debug: /MDd /Zi /Ob0 /Od /RTC1 # CMAKE_BUILD_TYPE is not available if a multi-configuration generator is used
# release: /MD /O2 /Ob2 /DNDEBUG # (eg Visual Studio generators)
# GCC + Clang(Linux): if(NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
# debug: -g message(STATUS "Setting build type to '${DEFAULT_CMAKE_BUILD_TYPE}' as none \
# release: -O3 -DNDEBUG was specified.")
set(CMAKE_BUILD_TYPE ${DEFAULT_CMAKE_BUILD_TYPE}
CACHE STRING "Choose the type of build." FORCE)
# Set the possible values of build type for cmake-gui
set_property(CACHE CMAKE_BUILD_TYPE
PROPERTY STRINGS Debug Release MinSizeRel RelWithDebInfo)
endif()
### Compile options
# Enable C++17 (Required) # Enable C++17 (Required)
set_property(TARGET ccls PROPERTY CXX_STANDARD 17) set_property(TARGET ccls PROPERTY CXX_STANDARD 17)
set_property(TARGET ccls PROPERTY CXX_STANDARD_REQUIRED ON) set_property(TARGET ccls PROPERTY CXX_STANDARD_REQUIRED ON)
set_property(TARGET ccls PROPERTY CXX_EXTENSIONS OFF) set_property(TARGET ccls PROPERTY CXX_EXTENSIONS OFF)
if(NOT LLVM_ENABLE_RTTI)
# releases.llvm.org libraries are compiled with -fno-rtti
# The mismatch between lib{clang,LLVM}* and ccls can make libstdc++ std::make_shared return nullptr
# _Sp_counted_ptr_inplace::_M_get_deleter
target_compile_options(ccls PRIVATE -fno-rtti)
endif()
# CMake sets MSVC for both MSVC and Clang(Windows) # CMake sets MSVC for both MSVC and Clang(Windows)
if(MSVC) if(MSVC)
# Common MSVC/Clang(Windows) options # Common MSVC/Clang(Windows) options
@ -72,9 +68,41 @@ endif()
### Libraries ### Libraries
# See cmake/FindClang.cmake find_package(Clang REQUIRED)
find_package(Clang 7.0.0)
target_link_libraries(ccls PRIVATE Clang::Clang) target_link_libraries(ccls PRIVATE
clangIndex
clangFormat
clangTooling
clangToolingInclusions
clangToolingCore
clangFrontend
clangParse
clangSerialization
clangSema
clangAST
clangLex
clangDriver
clangBasic
)
if(LLVM_LINK_LLVM_DYLIB)
target_link_libraries(ccls PRIVATE LLVM)
else()
# In llvm 7, clangDriver headers reference LLVMOption
target_link_libraries(ccls PRIVATE LLVMOption LLVMSupport)
endif()
if(NOT LLVM_ENABLE_RTTI)
# releases.llvm.org libraries are compiled with -fno-rtti
# The mismatch between lib{clang,LLVM}* and ccls can make libstdc++ std::make_shared return nullptr
# _Sp_counted_ptr_inplace::_M_get_deleter
if(MSVC)
target_compile_options(ccls PRIVATE /GR-)
else()
target_compile_options(ccls PRIVATE -fno-rtti)
endif()
endif()
# Enable threading support # Enable threading support
set(THREADS_PREFER_PTHREAD_FLAG ON) set(THREADS_PREFER_PTHREAD_FLAG ON)
@ -90,13 +118,34 @@ endif()
### Definitions ### Definitions
target_compile_definitions(ccls PRIVATE # Find Clang resource directory with Clang executable.
DEFAULT_RESOURCE_DIRECTORY=R"\(${Clang_RESOURCE_DIR}\)")
find_program(CLANG_EXECUTABLE clang)
if(NOT CLANG_EXECUTABLE)
message(FATAL_ERROR "clang executable not found.")
endif()
execute_process(
COMMAND ${CLANG_EXECUTABLE} -print-resource-dir
RESULT_VARIABLE CLANG_FIND_RESOURCE_DIR_RESULT
OUTPUT_VARIABLE CLANG_RESOURCE_DIR
ERROR_VARIABLE CLANG_FIND_RESOURCE_DIR_ERROR
OUTPUT_STRIP_TRAILING_WHITESPACE
)
if(CLANG_FIND_RESOURCE_DIR_RESULT)
message(FATAL_ERROR "Error retrieving Clang resource directory with Clang \
executable. Output:\n ${CLANG_FIND_RESOURCE_DIR_ERROR}")
endif()
set_property(SOURCE src/utils.cc APPEND PROPERTY COMPILE_DEFINITIONS
CLANG_RESOURCE_DIRECTORY=R"\(${CLANG_RESOURCE_DIR}\)")
### Includes ### Includes
target_include_directories(ccls PRIVATE src) target_include_directories(ccls PRIVATE src)
target_include_directories(ccls SYSTEM PRIVATE third_party) target_include_directories(ccls SYSTEM PRIVATE
third_party ${LLVM_INCLUDE_DIRS} ${CLANG_INCLUDE_DIRS})
if(USE_SYSTEM_RAPIDJSON) if(USE_SYSTEM_RAPIDJSON)
find_package(RapidJSON QUIET) find_package(RapidJSON QUIET)
@ -110,13 +159,6 @@ target_include_directories(ccls SYSTEM PRIVATE ${RapidJSON_INCLUDE_DIRS})
install(TARGETS ccls RUNTIME DESTINATION bin) install(TARGETS ccls RUNTIME DESTINATION bin)
### 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 ### Sources
target_sources(ccls PRIVATE third_party/siphash.cc) target_sources(ccls PRIVATE third_party/siphash.cc)

14
cmake/DefaultCMakeBuildType.cmake
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@ -1,14 +0,0 @@
set(DEFAULT_CMAKE_BUILD_TYPE Release)
# CMAKE_BUILD_TYPE is not available if a multi-configuration generator is used
# (eg Visual Studio generators)
if(NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
message(STATUS "Setting build type to '${DEFAULT_CMAKE_BUILD_TYPE}' as none \
was specified.")
set(CMAKE_BUILD_TYPE ${DEFAULT_CMAKE_BUILD_TYPE}
CACHE STRING "Choose the type of build." FORCE)
# Set the possible values of build type for cmake-gui
set_property(CACHE CMAKE_BUILD_TYPE
PROPERTY STRINGS Debug Release MinSizeRel RelWithDebInfo)
endif()

153
cmake/FindClang.cmake
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@ -1,153 +0,0 @@
#.rst
# FindClang
# ---------
#
# Find Clang and LLVM libraries required by ccls
#
# Results are reported in the following variables::
#
# Clang_FOUND - True if headers and requested libraries were found
# Clang_EXECUTABLE - Clang executable
# Clang_RESOURCE_DIR - Clang resource directory
# Clang_VERSION - Clang version as reported by Clang executable
#
# The following :prop_tgt:`IMPORTED` targets are also defined::
#
# Clang::Clang - Target for all required Clang libraries and headers
#
# This module reads hints about which libraries to look for and where to find
# them from the following variables::
#
# CLANG_ROOT - If set, only look for Clang components in CLANG_ROOT
#
# Example to link against Clang target::
#
# target_link_libraries(<target> PRIVATE Clang::Clang)
### Definitions
# Wrapper macro's around the find_* macro's from CMake that only search in
# CLANG_ROOT if it is defined
macro(_Clang_find_library VAR NAME)
# Windows needs lib prefix
if (CLANG_ROOT)
find_library(${VAR} NAMES ${NAME} lib${NAME}
NO_DEFAULT_PATH PATHS ${CLANG_ROOT} PATH_SUFFIXES lib)
else()
find_library(${VAR} NAMES ${NAME} lib${NAME})
endif()
endmacro()
macro(_Clang_find_add_library NAME)
_Clang_find_library(${NAME}_LIBRARY ${NAME})
list(APPEND _Clang_LIBRARIES ${${NAME}_LIBRARY})
endmacro()
macro(_Clang_find_path VAR INCLUDE_FILE)
if (CLANG_ROOT)
find_path(${VAR} ${INCLUDE_FILE}
NO_DEFAULT_PATH PATHS ${CLANG_ROOT} PATH_SUFFIXES include)
else()
find_path(${VAR} ${INCLUDE_FILE})
endif()
endmacro()
macro(_Clang_find_program VAR NAME)
if (CLANG_ROOT)
find_program(${VAR} ${NAME}
NO_DEFAULT_PATH PATHS ${CLANG_ROOT} PATH_SUFFIXES bin)
else()
find_program(${VAR} ${NAME})
endif()
endmacro()
### Start
set(_Clang_REQUIRED_VARS Clang_LIBRARY Clang_INCLUDE_DIR Clang_EXECUTABLE
Clang_RESOURCE_DIR Clang_VERSION
LLVM_INCLUDE_DIR LLVM_BUILD_INCLUDE_DIR)
_Clang_find_library(Clang_LIBRARY clangIndex)
_Clang_find_add_library(clangFormat)
_Clang_find_add_library(clangTooling)
_Clang_find_library(clangToolingInclusions_LIBRARY clangToolingInclusions)
if (clangToolingInclusions_LIBRARY)
list(APPEND _Clang_LIBRARIES ${clangToolingInclusions_LIBRARY})
endif()
_Clang_find_add_library(clangToolingCore)
_Clang_find_add_library(clangRewrite)
_Clang_find_add_library(clangFrontend)
_Clang_find_add_library(clangParse)
_Clang_find_add_library(clangSerialization)
_Clang_find_add_library(clangSema)
_Clang_find_add_library(clangAnalysis)
_Clang_find_add_library(clangEdit)
_Clang_find_add_library(clangAST)
_Clang_find_add_library(clangLex)
_Clang_find_add_library(clangDriver)
_Clang_find_add_library(clangBasic)
if(USE_SHARED_LLVM)
_Clang_find_add_library(LLVM)
else()
_Clang_find_add_library(LLVMMCParser)
_Clang_find_add_library(LLVMMC)
_Clang_find_add_library(LLVMBitReader)
_Clang_find_add_library(LLVMOption)
_Clang_find_add_library(LLVMProfileData)
_Clang_find_add_library(LLVMCore)
_Clang_find_add_library(LLVMBinaryFormat)
_Clang_find_add_library(LLVMSupport)
_Clang_find_add_library(LLVMDemangle)
endif()
_Clang_find_path(Clang_INCLUDE_DIR clang-c/Index.h)
_Clang_find_path(Clang_BUILD_INCLUDE_DIR clang/Driver/Options.inc)
_Clang_find_path(LLVM_INCLUDE_DIR llvm/PassInfo.h)
_Clang_find_path(LLVM_BUILD_INCLUDE_DIR llvm/Config/llvm-config.h)
_Clang_find_program(Clang_EXECUTABLE clang)
if(Clang_EXECUTABLE)
# Find Clang resource directory with Clang executable
execute_process(COMMAND ${Clang_EXECUTABLE} -print-resource-dir
RESULT_VARIABLE _Clang_FIND_RESOURCE_DIR_RESULT
OUTPUT_VARIABLE Clang_RESOURCE_DIR
ERROR_VARIABLE _Clang_FIND_RESOURCE_DIR_ERROR
OUTPUT_STRIP_TRAILING_WHITESPACE)
if(_Clang_FIND_RESOURCE_DIR_RESULT)
message(FATAL_ERROR "Error retrieving Clang resource directory with Clang \
executable. Output:\n ${_Clang_FIND_RESOURCE_DIR_ERROR}")
endif()
# Find Clang version
set(_Clang_VERSION_REGEX "([0-9]+)\\.([0-9]+)\\.([0-9]+)")
execute_process(
COMMAND ${Clang_EXECUTABLE} --version
OUTPUT_VARIABLE Clang_VERSION
)
string(REGEX MATCH ${_Clang_VERSION_REGEX} Clang_VERSION ${Clang_VERSION})
endif()
include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(Clang
FOUND_VAR Clang_FOUND
REQUIRED_VARS ${_Clang_REQUIRED_VARS}
VERSION_VAR Clang_VERSION
)
if(Clang_FOUND AND NOT TARGET Clang::Clang)
add_library(Clang::Clang UNKNOWN IMPORTED)
set_target_properties(Clang::Clang PROPERTIES
IMPORTED_LOCATION ${Clang_LIBRARY}
INTERFACE_INCLUDE_DIRECTORIES "${Clang_INCLUDE_DIR};${Clang_BUILD_INCLUDE_DIR};${LLVM_INCLUDE_DIR};${LLVM_BUILD_INCLUDE_DIR}")
if(NOT MSVC)
find_package(Curses REQUIRED)
find_package(ZLIB REQUIRED)
endif()
set_property(TARGET Clang::Clang PROPERTY IMPORTED_LINK_INTERFACE_LIBRARIES "${_Clang_LIBRARIES};${CURSES_LIBRARIES};${ZLIB_LIBRARIES}")
if(MINGW)
set_property(TARGET Clang::Clang APPEND_STRING PROPERTY IMPORTED_LINK_INTERFACE_LIBRARIES ";version")
endif()
endif()

4
src/utils.cc
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@ -177,5 +177,5 @@ int ReverseSubseqMatch(std::string_view pat, std::string_view text,
return -1; return -1;
} }
std::string GetDefaultResourceDirectory() { return DEFAULT_RESOURCE_DIRECTORY; } std::string GetDefaultResourceDirectory() { return CLANG_RESOURCE_DIRECTORY; }
} } // namespace ccls