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macros.cmake
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macro(add_to_alloptions _NEWNAME)
list(APPEND ALLOPTIONS ${_NEWNAME})
endmacro()
macro(set_option _NAME _DESC)
add_to_alloptions(${_NAME})
if(${ARGC} EQUAL 3)
set(_DEFLT ${ARGV2})
else()
set(_DEFLT OFF)
endif()
option(${_NAME} ${_DESC} ${_DEFLT})
endmacro()
macro(dep_option _NAME _DESC _DEFLT _DEPTEST _FAILDFLT)
add_to_alloptions("${_NAME}")
cmake_dependent_option("${_NAME}" "${_DESC}" "${_DEFLT}" "${_DEPTEST}" "${_FAILDFLT}")
endmacro()
macro(option_string _NAME _DESC _VALUE)
add_to_alloptions(${_NAME})
set(${_NAME} ${_VALUE} CACHE STRING "${_DESC}")
set(HAVE_${_NAME} ${_VALUE})
ENDMACRO()
macro(message_bool_option _NAME _VALUE)
set(_PAD "\t")
if(${ARGC} EQUAL 3)
set(_PAD ${ARGV2})
endif()
if(${_VALUE})
message(STATUS " ${_NAME}:${_PAD}ON")
else()
message(STATUS " ${_NAME}:${_PAD}OFF")
endif()
endmacro()
macro(message_tested_option _NAME)
set(_REQVALUE ${${_NAME}})
set(_PAD " ")
if(${ARGC} EQUAL 2)
set(_PAD ${ARGV1})
endif()
string(SUBSTRING "${_NAME}" 0 4 _NAMESTART)
if(_NAMESTART STREQUAL "SDL_")
string(SUBSTRING "${_NAME}" 4 -1 _STRIPPEDNAME)
else()
set(_STRIPPEDNAME "${_NAME}")
endif()
if(NOT HAVE_${_STRIPPEDNAME})
set(HAVE_${_STRIPPEDNAME} OFF)
elseif("${HAVE_${_STRIPPEDNAME}}" MATCHES "1|TRUE|YES|Y")
set(HAVE_${_STRIPPEDNAME} ON)
endif()
message(STATUS " ${_NAME}${_PAD}(Wanted: ${_REQVALUE}): ${HAVE_${_STRIPPEDNAME}}")
endmacro()
function(find_stringlength_longest_item inList outLength)
set(maxLength 0)
foreach(item IN LISTS ${inList})
string(LENGTH "${item}" slen)
if(slen GREATER maxLength)
set(maxLength ${slen})
endif()
endforeach()
set("${outLength}" ${maxLength} PARENT_SCOPE)
endfunction()
function(message_dictlist inList)
find_stringlength_longest_item(${inList} maxLength)
foreach(name IN LISTS ${inList})
# Get the padding
string(LENGTH ${name} nameLength)
math(EXPR padLength "(${maxLength} + 1) - ${nameLength}")
string(RANDOM LENGTH ${padLength} ALPHABET " " padding)
message_tested_option(${name} ${padding})
endforeach()
endfunction()
if(APPLE)
include(CheckOBJCSourceCompiles)
enable_language(OBJC)
endif()
function(SDL_detect_linker)
if(CMAKE_VERSION VERSION_LESS 3.29)
if(NOT DEFINED SDL_CMAKE_C_COMPILER_LINKER_ID)
execute_process(COMMAND ${CMAKE_LINKER} -v OUTPUT_VARIABLE LINKER_OUTPUT ERROR_VARIABLE LINKER_OUTPUT)
string(REGEX REPLACE "[\r\n]" " " LINKER_OUTPUT "${LINKER_OUTPUT}")
if(LINKER_OUTPUT MATCHES ".*Microsoft.*")
set(linker MSVC)
else()
set(linker GNUlike)
endif()
message(STATUS "Linker identification: ${linker}")
set(SDL_CMAKE_C_COMPILER_LINKER_ID "${linker}" CACHE STRING "Linker identification")
mark_as_advanced(SDL_CMAKE_C_COMPILER_LINKER_ID)
endif()
set(CMAKE_C_COMPILER_LINKER_ID "${SDL_CMAKE_C_COMPILER_LINKER_ID}" PARENT_SCOPE)
endif()
endfunction()
function(read_absolute_symlink DEST PATH)
file(READ_SYMLINK "${PATH}" p)
if(NOT IS_ABSOLUTE "${p}")
get_filename_component(pdir "${PATH}" DIRECTORY)
set(p "${pdir}/${p}")
endif()
get_filename_component(p "${p}" ABSOLUTE)
set("${DEST}" "${p}" PARENT_SCOPE)
endfunction()
function(win32_implib_identify_dll DEST IMPLIB)
cmake_parse_arguments(ARGS "NOTFATAL" "" "" ${ARGN})
if(CMAKE_DLLTOOL)
execute_process(
COMMAND "${CMAKE_DLLTOOL}" --identify "${IMPLIB}"
RESULT_VARIABLE retcode
OUTPUT_VARIABLE stdout
ERROR_VARIABLE stderr)
if(NOT retcode EQUAL 0)
if(NOT ARGS_NOTFATAL)
message(FATAL_ERROR "${CMAKE_DLLTOOL} failed.")
else()
set("${DEST}" "${DEST}-NOTFOUND" PARENT_SCOPE)
return()
endif()
endif()
string(STRIP "${stdout}" result)
set(${DEST} "${result}" PARENT_SCOPE)
elseif(MSVC)
get_filename_component(CMAKE_C_COMPILER_DIRECTORY "${CMAKE_C_COMPILER}" DIRECTORY CACHE)
find_program(CMAKE_DUMPBIN NAMES dumpbin PATHS "${CMAKE_C_COMPILER_DIRECTORY}")
if(CMAKE_DUMPBIN)
execute_process(
COMMAND "${CMAKE_DUMPBIN}" "-headers" "${IMPLIB}"
RESULT_VARIABLE retcode
OUTPUT_VARIABLE stdout
ERROR_VARIABLE stderr)
if(NOT retcode EQUAL 0)
if(NOT ARGS_NOTFATAL)
message(FATAL_ERROR "dumpbin failed.")
else()
set(${DEST} "${DEST}-NOTFOUND" PARENT_SCOPE)
return()
endif()
endif()
string(REGEX MATCH "DLL name[ ]+:[ ]+([^\n]+)\n" match "${stdout}")
if(NOT match)
if(NOT ARGS_NOTFATAL)
message(FATAL_ERROR "dumpbin did not find any associated dll for ${IMPLIB}.")
else()
set(${DEST} "${DEST}-NOTFOUND" PARENT_SCOPE)
return()
endif()
endif()
set(result "${CMAKE_MATCH_1}")
set(${DEST} "${result}" PARENT_SCOPE)
else()
message(FATAL_ERROR "Cannot find dumpbin, please set CMAKE_DUMPBIN cmake variable")
endif()
else()
if(NOT ARGS_NOTFATAL)
message(FATAL_ERROR "Don't know how to identify dll from import library. Set CMAKE_DLLTOOL (for mingw) or CMAKE_DUMPBIN (for MSVC)")
else()
set(${DEST} "${DEST}-NOTFOUND")
endif()
endif()
endfunction()
function(get_actual_target)
set(dst "${ARGV0}")
set(target "${${dst}}")
set(input "${target}")
get_target_property(alias "${target}" ALIASED_TARGET)
while(alias)
set(target "${alias}")
get_target_property(alias "${target}" ALIASED_TARGET)
endwhile()
message(DEBUG "get_actual_target(\"${input}\") -> \"${target}\"")
set("${dst}" "${target}" PARENT_SCOPE)
endfunction()
function(target_get_dynamic_library DEST TARGET)
set(result)
get_actual_target(TARGET)
if(WIN32)
# Use the target dll of the import library
set(props_to_check IMPORTED_IMPLIB)
if(CMAKE_BUILD_TYPE)
list(APPEND props_to_check IMPORTED_IMPLIB_${CMAKE_BUILD_TYPE})
endif()
list(APPEND props_to_check IMPORTED_LOCATION)
if(CMAKE_BUILD_TYPE)
list(APPEND props_to_check IMPORTED_LOCATION_${CMAKE_BUILD_TYPE})
endif()
foreach (config_type ${CMAKE_CONFIGURATION_TYPES} RELEASE DEBUG RELWITHDEBINFO MINSIZEREL)
list(APPEND props_to_check IMPORTED_IMPLIB_${config_type})
list(APPEND props_to_check IMPORTED_LOCATION_${config_type})
endforeach()
foreach(prop_to_check ${props_to_check})
if(NOT result)
get_target_property(propvalue "${TARGET}" ${prop_to_check})
if(propvalue AND EXISTS "${propvalue}")
win32_implib_identify_dll(result "${propvalue}" NOTFATAL)
endif()
endif()
endforeach()
else()
# 1. find the target library a file might be symbolic linking to
# 2. find all other files in the same folder that symbolic link to it
# 3. sort all these files, and select the 1st item on Linux, and last on macOS
set(location_properties IMPORTED_LOCATION)
if(CMAKE_BUILD_TYPE)
list(APPEND location_properties IMPORTED_LOCATION_${CMAKE_BUILD_TYPE})
endif()
foreach (config_type ${CMAKE_CONFIGURATION_TYPES} RELEASE DEBUG RELWITHDEBINFO MINSIZEREL)
list(APPEND location_properties IMPORTED_LOCATION_${config_type})
endforeach()
if(APPLE)
set(valid_shared_library_regex "\\.[0-9]+\\.dylib$")
else()
set(valid_shared_library_regex "\\.so\\.([0-9.]+)?[0-9]")
endif()
foreach(location_property ${location_properties})
if(NOT result)
get_target_property(library_path "${TARGET}" ${location_property})
message(DEBUG "get_target_property(${TARGET} ${location_property}) -> ${library_path}")
if(EXISTS "${library_path}")
get_filename_component(library_path "${library_path}" ABSOLUTE)
while (IS_SYMLINK "${library_path}")
read_absolute_symlink(library_path "${library_path}")
endwhile()
message(DEBUG "${TARGET} -> ${library_path}")
get_filename_component(libdir "${library_path}" DIRECTORY)
file(GLOB subfiles "${libdir}/*")
set(similar_files "${library_path}")
foreach(subfile ${subfiles})
if(IS_SYMLINK "${subfile}")
read_absolute_symlink(subfile_target "${subfile}")
while(IS_SYMLINK "${subfile_target}")
read_absolute_symlink(subfile_target "${subfile_target}")
endwhile()
get_filename_component(subfile_target "${subfile_target}" ABSOLUTE)
if(subfile_target STREQUAL library_path AND subfile MATCHES "${valid_shared_library_regex}")
list(APPEND similar_files "${subfile}")
endif()
endif()
endforeach()
list(SORT similar_files)
message(DEBUG "files that are similar to \"${library_path}\"=${similar_files}")
if(APPLE)
list(REVERSE similar_files)
endif()
list(GET similar_files 0 item)
get_filename_component(result "${item}" NAME)
endif()
endif()
endforeach()
endif()
if(result)
string(TOLOWER "${result}" result_lower)
if(WIN32 OR OS2)
if(NOT result_lower MATCHES ".*dll")
message(FATAL_ERROR "\"${result}\" is not a .dll library")
endif()
elseif(APPLE)
if(NOT result_lower MATCHES ".*dylib.*")
message(FATAL_ERROR "\"${result}\" is not a .dylib shared library")
endif()
else()
if(NOT result_lower MATCHES ".*so.*")
message(FATAL_ERROR "\"${result}\" is not a .so shared library")
endif()
endif()
else()
get_target_property(target_type ${TARGET} TYPE)
if(target_type MATCHES "SHARED_LIBRARY|MODULE_LIBRARY")
# OK
elseif(target_type MATCHES "STATIC_LIBRARY|OBJECT_LIBRARY|INTERFACE_LIBRARY|EXECUTABLE")
message(SEND_ERROR "${TARGET} is not a shared library, but has type=${target_type}")
else()
message(WARNING "Unable to extract dynamic library from target=${TARGET}, type=${target_type}.")
endif()
# TARGET_SONAME_FILE is not allowed for DLL target platforms.
if(WIN32)
set(result "$<TARGET_FILE_NAME:${TARGET}>")
else()
set(result "$<TARGET_SONAME_FILE_NAME:${TARGET}>")
endif()
endif()
set(${DEST} ${result} PARENT_SCOPE)
endfunction()
function(check_linker_supports_version_file VAR)
SDL_detect_linker()
if(CMAKE_C_COMPILER_LINKER_ID MATCHES "^(MSVC)$")
set(LINKER_SUPPORTS_VERSION_SCRIPT FALSE)
else()
cmake_push_check_state(RESET)
file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/CMakeFiles/dummy.sym" "n_0 {\n global:\n func;\n local: *;\n};\n")
list(APPEND CMAKE_REQUIRED_LINK_OPTIONS "-Wl,--version-script=${CMAKE_CURRENT_BINARY_DIR}/CMakeFiles/dummy.sym")
check_c_source_compiles("int func(void) {return 0;} int main(int argc,char*argv[]){(void)argc;(void)argv;return func();}" LINKER_SUPPORTS_VERSION_SCRIPT FAIL_REGEX "(unsupported|syntax error|unrecognized option)")
cmake_pop_check_state()
endif()
set(${VAR} "${LINKER_SUPPORTS_VERSION_SCRIPT}" PARENT_SCOPE)
endfunction()
if(CMAKE_VERSION VERSION_LESS 3.18)
function(check_linker_flag LANG FLAG VAR)
cmake_push_check_state(RESET)
list(APPEND CMAKE_REQUIRED_LINK_OPTIONS ${FLAG})
if(LANG STREQUAL "C")
include(CheckCSourceCompiles)
check_c_source_compiles("int main(int argc,char*argv[]){(void)argc;(void)argv;return 0;}" ${VAR} FAIL_REGEX "(unsupported|syntax error)")
elseif(LANG STREQUAL "CXX")
include(CheckCXXSourceCompiles)
check_cxx_source_compiles("int main(int argc,char*argv[]){(void)argc;(void)argv;return 0;}" ${VAR} FAIL_REGEX "(unsupported|syntax error)")
else()
message(FATAL_ERROR "Unsupported language: ${LANG}")
endif()
cmake_pop_check_state()
endfunction()
else()
cmake_policy(SET CMP0057 NEW) # Support new if() IN_LIST operator. (used inside check_linker_flag, used in CMake 3.18)
include(CheckLinkerFlag)
endif()
if(APPLE)
check_language(OBJC)
if(NOT CMAKE_OBJC_COMPILER)
message(WARNING "Cannot find working OBJC compiler.")
endif()
endif()
function(SDL_PrintSummary)
##### Info output #####
message(STATUS "")
message(STATUS "SDL3 was configured with the following options:")
message(STATUS "")
message(STATUS "Platform: ${CMAKE_SYSTEM}")
message(STATUS "64-bit: ${ARCH_64}")
message(STATUS "Compiler: ${CMAKE_C_COMPILER}")
message(STATUS "Revision: ${SDL_REVISION}")
message(STATUS "Vendor: ${SDL_VENDOR_INFO}")
message(STATUS "")
message(STATUS "Subsystems:")
find_stringlength_longest_item(SDL_SUBSYSTEMS maxLength)
foreach(_SUB IN LISTS SDL_SUBSYSTEMS)
string(LENGTH ${_SUB} _SUBLEN)
math(EXPR _PADLEN "(${maxLength} + 1) - ${_SUBLEN}")
string(RANDOM LENGTH ${_PADLEN} ALPHABET " " _PADDING)
string(TOUPPER ${_SUB} _OPT)
message_bool_option(${_SUB} SDL_${_OPT} ${_PADDING})
endforeach()
message(STATUS "")
message(STATUS "Options:")
list(SORT ALLOPTIONS)
message_dictlist(ALLOPTIONS)
message(STATUS "")
message(STATUS " Build Shared Library: ${SDL_SHARED}")
message(STATUS " Build Static Library: ${SDL_STATIC}")
if(APPLE)
message(STATUS " Build libraries as Apple Framework: ${SDL_FRAMEWORK}")
endif()
message(STATUS "")
if(UNIX)
message(STATUS "If something was not detected, although the libraries")
message(STATUS "were installed, then make sure you have set the")
message(STATUS "CMAKE_C_FLAGS and CMAKE_PREFIX_PATH CMake variables correctly.")
message(STATUS "")
endif()
if(UNIX AND NOT (ANDROID OR APPLE OR EMSCRIPTEN OR HAIKU OR RISCOS))
if(NOT (HAVE_X11 OR HAVE_WAYLAND))
if(NOT SDL_UNIX_CONSOLE_BUILD)
message(FATAL_ERROR
"SDL could not find X11 or Wayland development libraries on your system. "
"This means SDL will not be able to create windows on a typical unix operating system. "
"Most likely, this is not wanted."
"\n"
"On Linux, install the packages listed at "
"https://github.com/libsdl-org/SDL/blob/main/docs/README-linux.md#build-dependencies "
"\n"
"If you really don't need desktop windows, the documentation tells you how to skip this check. "
"https://github.com/libsdl-org/SDL/blob/main/docs/README-cmake.md#cmake-fails-to-build-without-x11-or-wayland-support\n"
)
endif()
endif()
endif()
endfunction()
function(SDL_install_pdb TARGET DIRECTORY)
get_property(type TARGET ${TARGET} PROPERTY TYPE)
if(type MATCHES "^(SHARED_LIBRARY|EXECUTABLE)$")
install(FILES $<TARGET_PDB_FILE:${TARGET}> DESTINATION "${DIRECTORY}" OPTIONAL)
elseif(type STREQUAL "STATIC_LIBRARY")
# FIXME: Use $<TARGET_COMPILE_PDB_FILE:${TARGET} once it becomes available (https://gitlab.kitware.com/cmake/cmake/-/issues/25244)
if(CMAKE_GENERATOR MATCHES "^Visual Studio.*")
install(CODE "file(INSTALL DESTINATION \"\${CMAKE_INSTALL_PREFIX}/${DIRECTORY}\" TYPE FILE OPTIONAL FILES \"${CMAKE_CURRENT_BINARY_DIR}/\${CMAKE_INSTALL_CONFIG_NAME}/${TARGET}.pdb\")")
else()
install(CODE "file(INSTALL DESTINATION \"\${CMAKE_INSTALL_PREFIX}/${DIRECTORY}\" TYPE FILE OPTIONAL FILES \"${CMAKE_CURRENT_BINARY_DIR}/CMakeFiles/${TARGET}.dir/${TARGET}.pdb\")")
endif()
endif()
endfunction()