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cmake_minimum_required(VERSION 3.12 FATAL_ERROR)
include(GNUInstallDirs)
project(mcl LANGUAGES CXX VERSION 0.1.12)
# Determine if we're built as a subproject (using add_subdirectory)
# or if this is the master project.
set(MASTER_PROJECT OFF)
if (CMAKE_CURRENT_SOURCE_DIR STREQUAL CMAKE_SOURCE_DIR)
set(MASTER_PROJECT ON)
endif()
# Project options
option(MCL_WARNINGS_AS_ERRORS "Warnings as errors" ${MASTER_PROJECT})
option(MCL_INSTALL "Enable installation" ${MASTER_PROJECT})
# Default to a Release build
if (NOT CMAKE_BUILD_TYPE)
set(CMAKE_BUILD_TYPE "Release" CACHE STRING "Choose the type of build, options are: Debug Release RelWithDebInfo MinSizeRel." FORCE)
message(STATUS "Defaulting to a Release build")
endif()
# Set hard requirements for C++
set(CMAKE_CXX_STANDARD 20)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
set(CMAKE_CXX_EXTENSIONS OFF)
# Warn on CMake API deprecations
set(CMAKE_WARN_DEPRECATED ON)
# Disable in-source builds
set(CMAKE_DISABLE_SOURCE_CHANGES ON)
set(CMAKE_DISABLE_IN_SOURCE_BUILD ON)
if ("${CMAKE_SOURCE_DIR}" STREQUAL "${CMAKE_BINARY_DIR}")
message(SEND_ERROR "In-source builds are not allowed.")
endif()
# Add the module directory to the list of paths
list(APPEND CMAKE_MODULE_PATH "${PROJECT_SOURCE_DIR}/CMakeModules")
# Compiler flags
if (MSVC)
set(MCL_CXX_FLAGS
/std:c++latest
/experimental:external
/external:W0
/external:anglebrackets
/W4
/w44263 # Non-virtual member function hides base class virtual function
/w44265 # Class has virtual functions, but destructor is not virtual
/w44456 # Declaration of 'var' hides previous local declaration
/w44457 # Declaration of 'var' hides function parameter
/w44458 # Declaration of 'var' hides class member
/w44459 # Declaration of 'var' hides global definition
/w44946 # Reinterpret-cast between related types
/wd4592 # Symbol will be dynamically initialized (implementation limitation)
/permissive- # Stricter C++ standards conformance
/MP
/Zi
/Zo
/EHsc
/Zc:externConstexpr # Allows external linkage for variables declared "extern constexpr", as the standard permits.
/Zc:inline # Omits inline functions from object-file output.
/Zc:throwingNew # Assumes new (without std::nothrow) never returns null.
/volatile:iso # Use strict standard-abiding volatile semantics
/bigobj # Increase number of sections in .obj files
/DNOMINMAX)
if (MCL_WARNINGS_AS_ERRORS)
list(APPEND MCL_CXX_FLAGS /WX)
endif()
if (CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
list(APPEND MCL_CXX_FLAGS
-Qunused-arguments
-Wno-missing-braces)
endif()
else()
set(MCL_CXX_FLAGS
-Wall
-Wextra
-Wcast-qual
-pedantic
-pedantic-errors
-Wfatal-errors
-Wno-missing-braces)
if (MCL_WARNINGS_AS_ERRORS)
list(APPEND MCL_CXX_FLAGS -Werror)
endif()
endif()
# Dependencies
if (NOT TARGET Catch2::Catch2)
find_package(Catch2 3 QUIET)
endif()
if (NOT TARGET fmt::fmt)
find_package(fmt REQUIRED)
endif()
# Project files
add_subdirectory(src)
if (TARGET Catch2::Catch2 AND MASTER_PROJECT)
add_subdirectory(tests)
endif()
# Install instructions
if (MCL_INSTALL)
include(GNUInstallDirs)
include(CMakePackageConfigHelpers)
install(TARGETS mcl EXPORT mclTargets)
install(EXPORT mclTargets
NAMESPACE merry::
DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake/mcl"
)
configure_package_config_file(CMakeModules/mclConfig.cmake.in
mclConfig.cmake
INSTALL_DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake/mcl"
)
write_basic_package_version_file(mclConfigVersion.cmake
COMPATIBILITY SameMajorVersion
)
install(FILES
"${CMAKE_CURRENT_BINARY_DIR}/mclConfig.cmake"
"${CMAKE_CURRENT_BINARY_DIR}/mclConfigVersion.cmake"
DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake/mcl"
)
install(DIRECTORY include/ TYPE INCLUDE FILES_MATCHING PATTERN "*.hpp")
endif()
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