Common C++ classes and routines used by my applications such as argument parser, IO and conversion utilities
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cmake_minimum_required(VERSION 3.3.0 FATAL_ERROR)
if(NOT DEFINED THIRD_PARTY_MODULE_LOADED)
macro(save_default_library_suffixes)
set(DEFAULT_CMAKE_FIND_LIBRARY_SUFFIXES ${CMAKE_FIND_LIBRARY_SUFFIXES})
endmacro()
macro(restore_default_library_suffixes)
set(CMAKE_FIND_LIBRARY_SUFFIXES ${DEFAULT_CMAKE_FIND_LIBRARY_SUFFIXES})
unset(DEFAULT_CMAKE_FIND_LIBRARY_SUFFIXES)
endmacro()
macro(configure_static_library_suffixes)
# allows to look for static libraries in particular
if(WIN32)
set(CMAKE_FIND_LIBRARY_SUFFIXES .a .lib)
else()
set(CMAKE_FIND_LIBRARY_SUFFIXES .a)
endif()
endmacro()
macro(configure_dynamic_library_suffixes)
# allows to look for dynamic libraries in particular
if(WIN32)
set(CMAKE_FIND_LIBRARY_SUFFIXES .dll .dll.a)
elseif(APPLE)
set(CMAKE_FIND_LIBRARY_SUFFIXES .dylib .so)
else()
set(CMAKE_FIND_LIBRARY_SUFFIXES .so)
endif()
endmacro()
macro(link_against_library NAME LINKAGE REQUIRED)
# determine whether the library is required or optional
# FIXME: improve passing required argument
if("${REQUIRED}" STREQUAL "OPTIONAL")
set(${NAME}_REQUIRED "NO")
elseif("${REQUIRED}" STREQUAL "REQUIRED")
set(${NAME}_REQUIRED "REQUIRED")
else()
message(FATAL_ERROR "Invalid use of link_against_library; must specify either REQUIRED or OPTIONAL.")
endif()
# add library to list of libraries to link against when building dynamic libraries or applications
if(${NAME}_STATIC_LIB AND (("${LINKAGE}" STREQUAL "AUTO_LINKAGE" AND ((NOT (${NAME}_DYNAMIC_LIB OR ${NAME}_SHARED_LIB)) OR (STATIC_LINKAGE AND "${META_PROJECT_TYPE}" STREQUAL "application") OR (STATIC_LIBRARY_LINKAGE AND ("${META_PROJECT_TYPE}" STREQUAL "" OR "${META_PROJECT_TYPE}" STREQUAL "library")))) OR ("${LINKAGE}" STREQUAL "STATIC")))
set(USE_STATIC_${NAME} ON)
list(APPEND LIBRARIES ${${NAME}_STATIC_LIB})
if(${${NAME}_STATIC_LIB} IN_LIST META_PUBLIC_STATIC_LIB_DEPENDS)
list(APPEND PUBLIC_LIBRARIES ${${NAME}_STATIC_LIB})
else()
list(APPEND PRIVATE_LIBRARIES ${${NAME}_STATIC_LIB})
endif()
message(STATUS "Linking ${TARGET_PREFIX}${META_PROJECT_NAME}${TARGET_SUFFIX} statically against external library ${NAME} (${${NAME}_STATIC_LIB}).")
elseif((${NAME}_DYNAMIC_LIB OR ${NAME}_SHARED_LIB) AND (("${LINKAGE}" STREQUAL "AUTO_LINKAGE") OR ("${LINKAGE}" STREQUAL "SHARED")))
set(USE_SHARED_${NAME} ON)
if(NOT ${NAME}_DYNAMIC_LIB)
set(${NAME}_DYNAMIC_LIB ${${NAME}_SHARED_LIB})
endif()
list(APPEND LIBRARIES ${${NAME}_DYNAMIC_LIB})
if(${${NAME}_DYNAMIC_LIB} IN_LIST META_PUBLIC_SHARED_LIB_DEPENDS)
list(APPEND PUBLIC_LIBRARIES ${${NAME}_DYNAMIC_LIB})
else()
list(APPEND PRIVATE_LIBRARIES ${${NAME}_DYNAMIC_LIB})
endif()
message(STATUS "Linking ${TARGET_PREFIX}${META_PROJECT_NAME}${TARGET_SUFFIX} dynamically against external library ${NAME} (${${NAME}_DYNAMIC_LIB}).")
else()
if(${NAME}_REQUIRED)
message(FATAL_ERROR "External library ${NAME} required by ${TARGET_PREFIX}${META_PROJECT_NAME}${TARGET_SUFFIX} is not available for the specified linkage ${LINKAGE}.")
else()
message(WARNING "External library ${NAME} required by ${TARGET_PREFIX}${META_PROJECT_NAME}${TARGET_SUFFIX} is not available for the specified linkage ${LINKAGE}.")
endif()
endif()
# add library to list of libraries to be provided as transitive dependencies when building static libraries
if(${NAME}_STATIC_LIB)
list(APPEND STATIC_LIBRARIES ${${NAME}_STATIC_LIB})
if(${${NAME}_STATIC_LIB} IN_LIST META_PUBLIC_STATIC_LIB_DEPENDS)
list(APPEND PUBLIC_STATIC_LIBRARIES ${${NAME}_STATIC_LIB})
else()
list(APPEND PRIVATE_STATIC_LIBRARIES ${${NAME}_STATIC_LIB})
endif()
message(STATUS "Adding ${${NAME}_STATIC_LIB} to static library dependencies of ${TARGET_PREFIX}${META_PROJECT_NAME}${TARGET_SUFFIX}.")
endif()
endmacro()
macro(use_external_library NAME LINKAGE REQUIRED)
save_default_library_suffixes()
configure_dynamic_library_suffixes()
find_library(${NAME}_DYNAMIC_LIB ${NAME})
configure_static_library_suffixes()
find_library(${NAME}_STATIC_LIB ${NAME})
link_against_library(${NAME} ${LINKAGE} ${REQUIRED})
restore_default_library_suffixes()
endmacro()
function(use_external_library_from_package_dynamic NAME PKGNAME INCLUDE_VAR LIBRARY_VAR COMPAT_VERSION)
# internally used by use_external_library_from_package to find dynamic libraries
configure_dynamic_library_suffixes()
find_package(${PKGNAME} ${COMPAT_VERSION})
include_directories(${${INCLUDE_VAR}})
set(${NAME}_DYNAMIC_LIB ${${LIBRARY_VAR}} PARENT_SCOPE)
endfunction()
function(use_external_library_from_package_static NAME PKGNAME INCLUDE_VAR LIBRARY_VAR COMPAT_VERSION)
# internally used by use_external_library_from_package to find static libraries
configure_static_library_suffixes()
find_package(${PKGNAME} ${COMPAT_VERSION})
include_directories(${${INCLUDE_VAR}})
set(${NAME}_STATIC_LIB ${${LIBRARY_VAR}} PARENT_SCOPE)
endfunction()
macro(use_external_library_from_package NAME PKGNAME VERSION INCLUDE_VAR LIBRARY_VAR LINKAGE REQUIRED)
save_default_library_suffixes()
# handle specified VERSION
if("${VERSION}" STREQUAL "ANY_VERSION")
set(${NAME}_COMPATIBLE_VERSION "")
else()
set(${NAME}_COMPATIBLE_VERSION ${VERSION})
endif()
# use the find_library approach first because it is less buggy when trying to detect static libraries
configure_dynamic_library_suffixes()
find_library(${NAME}_DYNAMIC_LIB ${NAME})
configure_static_library_suffixes()
find_library(${NAME}_STATIC_LIB ${NAME})
# fall back to actual use of find_package
# use separate functions to get a new scope
if(NOT ${NAME}_DYNAMIC_LIB)
use_external_library_from_package_dynamic(${NAME} ${PKGNAME} ${INCLUDE_VAR} "${LIBRARY_VAR}" "${${NAME}_COMPATIBLE_VERSION}")
endif()
if(NOT ${NAME}_STATIC_LIB)
use_external_library_from_package_static(${NAME} ${PKGNAME} ${INCLUDE_VAR} "${LIBRARY_VAR}" "${${NAME}_COMPATIBLE_VERSION}")
endif()
link_against_library(${NAME} ${LINKAGE} ${REQUIRED})
restore_default_library_suffixes()
endmacro()
macro(use_iconv LINKAGE REQUIRED)
# check whether iconv exists in the standard library
include(CheckFunctionExists)
check_function_exists(iconv HAS_ICONV)
if(HAS_ICONV)
message(STATUS "Using iconv from the standard library for ${META_PROJECT_NAME}.")
else()
# find external iconv library
use_external_library(iconv ${LINKAGE} ${REQUIRED})
endif()
endmacro()
set(THIRD_PARTY_MODULE_LOADED YES)
endif()