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CMakeLists.txt
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CMakeLists.txt
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cmake_minimum_required(VERSION 3.17)
set(CMAKE_EXPORT_COMPILE_COMMANDS ON) # For clang-tidy
set(BUILD_SHARED_LIBS ON)
set(CMAKE_CXX_STANDARD 17) # Compile as C++17
set(CMAKE_CXX_STANDARD_REQUIRED ON) # Require C++17 support
project(YATCPIP
VERSION 2020.10
DESCRIPTION "Yet Another TCP IP Stack on User Space @ https://github.com/RetonwPlato/YA-TCPIP"
LANGUAGE C CXX
)
# This checks if you're running CMake from a folder that already has CMakeLists.txt.
file(TO_CMAKE_PATH "${PROJECT_BINARY_DIR}/CMakeLists.txt" PATH_TO_CMAKELISTS_TXT)
if (EXISTS "${PATH_TO_CMAKELISTS_TXT}")
message(FATAL_ERROR "Run CMake from a build subdirectory! \"mkdir build ; cd build ; cmake ..\" \
Some junk files were created in this folder (CMakeCache.txt, CMakeFiles); you should delete those.")
endif ()
# Expected directory structure.
set(YATCPIP_BUILD_SUPPORT_DIR "${CMAKE_SOURCE_DIR}/build_support")
set(YATCPIP_CLANG_SEARCH_PATH "/usr/local/bin" "/usr/bin" "/usr/local/opt/llvm/bin" "/usr/local/opt/llvm@8/bin"
"/usr/local/Cellar/llvm/8.0.1/bin")
################################################################################################################
# DEPENDENCIES
################################################################################################################
#CTest
enable_testing()
#clang-format
find_program(CLANG_FORMAT_BIN
NAMES clang-format clang-format-8
HINTS ${YATCPIP_CLANG_SEARCH_PATH}
)
if ("${CLANG_FORMAT_BIN}" STREQUAL "CLANG_FORMAT_BIN-NOTFOUND")
message(WARNING "YATCPIP/main couldn't find clang-format.")
else()
message(STATUS "YATCPIP/main found clang-format at ${CLANG_FORMAT_BIN}")
endif()
# clang-tidy
find_program(CLANG_TIDY_BIN
NAMES clang-tidy clang-tidy-8
HINTS ${YATCPIP_CLANG_SEARCH_PATH})
if ("${CLANG_TIDY_BIN}" STREQUAL "CLANG_TIDY_BIN-NOTFOUND")
message(WARNING "YATCPIP/main couldn't find clang-tidy.")
else()
# Output compile_commands.json
set(CMAKE_EXPORT_COMPILE_COMMANDS 1)
message(STATUS "YATCPIP/main found clang-tidy at ${CLANG_TIDY_BIN}")
endif()
# cpplint
find_program(CPPLINT_BIN
NAMES cpplint cpplint.py
HINTS "${YATCPIP_BUILD_SUPPORT_DIR}")
if ("${CPPLINT_BIN}" STREQUAL "CPPLINT_BIN-NOTFOUND")
message(WARNING "YATCPIP/main couldn't find cpplint.")
else()
message(STATUS "YATCPIP/main found cpplint at ${CPPLINT_BIN}")
endif()
# gmock gtest https://crascit.com/2015/07/25/cmake-gtest/
configure_file("${PROJECT_SOURCE_DIR}/build_support/gtest_CMakeLists.txt.in" googletest-download/CMakeLists.txt)
execute_process(COMMAND "${CMAKE_COMMAND}" -G "${CMAKE_GENERATOR}" .
WORKING_DIRECTORY "${CMAKE_BINARY_DIR}/googletest-download")
execute_process(COMMAND "${CMAKE_COMMAND}" --build .
WORKING_DIRECTORY "${CMAKE_BINARY_DIR}/googletest-download")
set(gtest_force_shared_crt ON CACHE BOOL "" FORCE) # don't override our compiler/linker options when building gtest
add_subdirectory("${CMAKE_BINARY_DIR}/googletest-src" "${CMAKE_BINARY_DIR}/googletest-build")
######################################################################################################################
# COMPILER SETUP
######################################################################################################################
# Compiler flags.
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fPIC -Wall -Wextra -Werror -march=native")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-unused-parameter -Wno-attributes") #TODO: remove
set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -O0 -ggdb -fsanitize=address -fno-omit-frame-pointer -fno-optimize-sibling-calls")
set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -fPIC")
set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -fPIC")
set(CMAKE_STATIC_LINKER_FLAGS "${CMAKE_STATIC_LINKER_FLAGS} -fPIC")
set(GCC_COVERAGE_LINK_FLAGS "-fPIC")
message(STATUS "CMAKE_CXX_FLAGS: ${CMAKE_CXX_FLAGS}")
message(STATUS "CMAKE_CXX_FLAGS_DEBUG: ${CMAKE_CXX_FLAGS_DEBUG}")
message(STATUS "CMAKE_EXE_LINKER_FLAGS: ${CMAKE_EXE_LINKER_FLAGS}")
message(STATUS "CMAKE_SHARED_LINKER_FLAGS: ${CMAKE_SHARED_LINKER_FLAGS}")
# Output directory.
set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib)
set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib)
set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin)
# Includes.
set(YATCPIP_SRC_INCLUDE_DIR ${PROJECT_SOURCE_DIR}/src/include)
set(YATCPIP_TEST_INCLUDE_DIR ${PROJECT_SOURCE_DIR}/test/include)
set(YATCPIP_THIRD_PARTY_INCLUDE_DIR ${PROJECT_SOURCE_DIR}/third_party)
include_directories(${YATCPIP_SRC_INCLUDE_DIR} ${YATCPIP_TEST_INCLUDE_DIR} ${YATCPIP_THIRD_PARTY_INCLUDE_DIR})
include_directories(BEFORE src) # This is needed for gtest.
add_subdirectory(src)
add_subdirectory(test)
######################################################################################################################
# MAKE TARGETS
######################################################################################################################
##########################################
# "make format"
# "make check-format"
##########################################
string(CONCAT YATCPIP_FORMAT_DIRS
"${CMAKE_CURRENT_SOURCE_DIR}/src,"
"${CMAKE_CURRENT_SOURCE_DIR}/test,"
)
# runs clang format and updates files in place.
add_custom_target(format ${YATCPIP_BUILD_SUPPORT_DIR}/run_clang_format.py
${CLANG_FORMAT_BIN}
${YATCPIP_BUILD_SUPPORT_DIR}/clang_format_exclusions.txt
--source_dirs
${YATCPIP_FORMAT_DIRS}
--fix
--quiet
)
# runs clang format and exits with a non-zero exit code if any files need to be reformatted
add_custom_target(check-format ${YATCPIP_BUILD_SUPPORT_DIR}/run_clang_format.py
${CLANG_FORMAT_BIN}
${YATCPIP_BUILD_SUPPORT_DIR}/clang_format_exclusions.txt
--source_dirs
${YATCPIP_FORMAT_DIRS}
--quiet
)
##########################################
# "make check-lint"
##########################################
file(GLOB_RECURSE YATCPIP_LINT_FILES
"${CMAKE_CURRENT_SOURCE_DIR}/src/*.h"
"${CMAKE_CURRENT_SOURCE_DIR}/src/*.cpp"
"${CMAKE_CURRENT_SOURCE_DIR}/test/*.h"
"${CMAKE_CURRENT_SOURCE_DIR}/test/*.cpp"
)
# Balancing act: cpplint.py takes a non-trivial time to launch,
# so process 12 files per invocation, while still ensuring parallelism
add_custom_target(check-lint echo '${YATCPIP_LINT_FILES}' | xargs -n12 -P8
${CPPLINT_BIN}
--verbose=2 --quiet
--linelength=120
--filter=-legal/copyright,-build/header_guard
)
###########################################################
# "make check-clang-tidy" target
###########################################################
# runs clang-tidy and exits with a non-zero exit code if any errors are found.
# note that clang-tidy automatically looks for a .clang-tidy file in parent directories
add_custom_target(check-clang-tidy
${YATCPIP_BUILD_SUPPORT_DIR}/run_clang_tidy.py # run LLVM's clang-tidy script
-clang-tidy-binary ${CLANG_TIDY_BIN} # using our clang-tidy binary
-p ${CMAKE_BINARY_DIR} # using cmake's generated compile commands
)
add_dependencies(check-clang-tidy gtest YATCPIP_shared) # needs gtest headers, compile_commands.json