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ModernCppStarter/CMakeLists.txt
ClausKlein 88781d22ab add build time dependency to static lib
the header only fmt lib is used to show this
2021-02-10 22:33:08 +01:00

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CMake

cmake_minimum_required(VERSION 3.14 FATAL_ERROR)
# ---- Project ----
# Note: update this to your new project's name and version
project(
Greeter
VERSION 1.1
LANGUAGES CXX
)
# ---- Include guards ----
if(PROJECT_SOURCE_DIR STREQUAL PROJECT_BINARY_DIR)
message(
FATAL_ERROR
"In-source builds not allowed. Please make a new directory (called a build directory) and run CMake from there."
)
endif()
# ---- Project settings ----
if(NOT DEFINED CMAKE_CXX_STANDARD)
set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
set(CMAKE_CXX_EXTENSIONS NO)
endif()
# ---- Add dependencies via CPM ----
# see https://github.com/TheLartians/CPM.cmake for more info
include(cmake/CPM.cmake)
# PackageProject.cmake will be used to make our target installable
CPMAddPackage(
NAME PackageProject.cmake
GITHUB_REPOSITORY TheLartians/PackageProject.cmake
VERSION 1.4.1
)
# NOTE: If fmt is not imported, this is needed to prevent: CMake Error: install(EXPORT
# "GreeterTargets" ...) includes target "Greeter" which requires target "fmt" that is not in any
# export set. see too https://gitlab.kitware.com/cmake/cmake/-/issues/15415
set(FMT_VERSION 7.1.3)
CPMAddPackage(
NAME fmt
GIT_TAG ${FMT_VERSION}
GITHUB_REPOSITORY fmtlib/fmt
# XXX OPTION "FMT_INSTALL YES"
)
# ---- Add source files ----
# Note: globbing sources is considered bad practice as CMake's generators may not detect new files
# automatically. Keep that in mind when changing files, or explicitly mention them here.
file(GLOB_RECURSE headers CONFIGURE_DEPENDS "${CMAKE_CURRENT_SOURCE_DIR}/include/*.h")
file(GLOB_RECURSE sources CONFIGURE_DEPENDS "${CMAKE_CURRENT_SOURCE_DIR}/source/*.cpp")
# ---- Create library ----
# Note: for header-only libraries change all PUBLIC flags to INTERFACE and create an interface
# target:
add_library(Greeter)
target_compile_features(Greeter PUBLIC cxx_std_17)
target_sources(Greeter PRIVATE ${headers} ${sources})
# being a cross-platform target, we enforce standards conformance on MSVC
if(MSVC)
target_compile_options(Greeter PUBLIC /permissive)
endif()
# Link dependencies (if required)
target_link_libraries(Greeter PRIVATE $<BUILD_INTERFACE:fmt::fmt-header-only>)
# XXX target_link_libraries(Greeter PUBLIC fmt::fmt)
target_include_directories(
Greeter PUBLIC $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/include>
$<INSTALL_INTERFACE:include/${PROJECT_NAME}-${PROJECT_VERSION}>
)
# ---- Create an installable target ----
# this allows users to install and find the library via `find_package()`.
# the location where the project's version header will be placed should match the project's regular
# header paths
string(TOLOWER ${PROJECT_NAME}/version.h VERSION_HEADER_LOCATION)
packageProject(
NAME ${PROJECT_NAME}
VERSION ${PROJECT_VERSION}
NAMESPACE ${PROJECT_NAME}
BINARY_DIR ${PROJECT_BINARY_DIR}
INCLUDE_DIR ${PROJECT_SOURCE_DIR}/include
INCLUDE_DESTINATION include/${PROJECT_NAME}-${PROJECT_VERSION}
VERSION_HEADER "${VERSION_HEADER_LOCATION}"
# XXX DEPENDENCIES "fmt ${FMT_VERSION}"
)