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function(generate_hex_number _var_name _version)
set(_hexnumber 0)
set(version_regex "^([0-9]+)\\.([0-9]+)\\.([0-9]+)$")
string(REGEX REPLACE ${version_regex} "\\1" _version_major "${_version}")
string(REGEX REPLACE ${version_regex} "\\2" _version_minor "${_version}")
string(REGEX REPLACE ${version_regex} "\\3" _version_patch "${_version}")
set(_outputformat)
set(_outputformat OUTPUT_FORMAT HEXADECIMAL)
math(EXPR _hexnumber "${_version_major}*65536 + ${_version_minor}*256 + ${_version_patch}" ${_outputformat})
set(${_var_name} ${_hexnumber} PARENT_SCOPE)
endfunction()
generate_hex_number(disable_deprecated_before_and_at_hexnumber ${LIBRARY_DISABLE_DEPRECATED_BEFORE_AND_AT})
if(GROUP_MODE STREQUAL "GROUP_USE_GROUP")
set(_deprecation_macros_base_name "LIBGROUP")
else()
set(_deprecation_macros_base_name "LIBRARY")
endif()
function(testAPI code_var_name)
set(options BUILD_TIME_ONLY_DISABLABLE NO_WARNING)
set(oneValueArgs DEPRECATED_AT CXX_STANDARD)
set(multiValueArgs)
cmake_parse_arguments(ARGS "${options}" "${oneValueArgs}" "${multiValueArgs}" ${ARGN})
if((NOT ARGS_DEPRECATED_AT) OR
(ARGS_BUILD_TIME_ONLY_DISABLABLE AND ARGS_DEPRECATED_AT VERSION_GREATER DEPRECATED_EXCLUDED_BEFORE_AND_AT) OR
(ARGS_DEPRECATED_AT VERSION_GREATER LIBRARY_DISABLE_DEPRECATED_BEFORE_AND_AT))
set(_build_result_expected TRUE)
else()
set(_build_result_expected FALSE)
endif()
if (ARGS_CXX_STANDARD)
if(MSVC)
# C++11 is default for MSVC, no /std:c++11 flag available to set
if (NOT ARGS_CXX_STANDARD STREQUAL "11")
set(std_flag "/std:c++${ARGS_CXX_STANDARD}")
endif()
else()
set(std_flag "-std=c++${ARGS_CXX_STANDARD}")
endif()
else()
set(std_flag)
endif()
set(CMAKE_REQUIRED_FLAGS "${std_flag}")
set(CMAKE_REQUIRED_LIBRARIES library)
set(CMAKE_REQUIRED_DEFINITIONS "-D${_deprecation_macros_base_name}_DISABLE_DEPRECATED_BEFORE_AND_AT=${disable_deprecated_before_and_at_hexnumber}")
set(_code "
#include <library.hpp>
int main(int, char**)
{
${${code_var_name}}
}
")
unset(_result CACHE) # clear out as check_cxx_source_compiles caches the result
check_cxx_source_compiles("${_code}" _result)
assert_var_bool_value(_result ${_build_result_expected})
# check warning
if(_build_result_expected)
if(NOT ARGS_NO_WARNING AND
((ARGS_BUILD_TIME_ONLY_DISABLABLE) OR
(NOT ARGS_BUILD_TIME_ONLY_DISABLABLE AND ARGS_DEPRECATED_AT AND
ARGS_DEPRECATED_AT VERSION_GREATER LIBRARY_DISABLE_DEPRECATED_BEFORE_AND_AT)))
set(_dep_warning_as_error_result_expected FALSE)
else()
set(_dep_warning_as_error_result_expected TRUE)
endif()
if(MSVC)
# warning C4996 warns about deprecated declarations
set(dep_warning_as_error_flag "-we4996")
else()
set(dep_warning_as_error_flag "-Werror=deprecated-declarations")
endif()
set(CMAKE_REQUIRED_FLAGS "${std_flag} ${dep_warning_as_error_flag}")
set(CMAKE_REQUIRED_DEFINITIONS) # unset LIBRARY_DISABLE_DEPRECATED_BEFORE_AND_AT, as LIBRARY_DEPRECATED_WARNINGS_SINCE defaults to it
unset(_dep_warning_result CACHE) # clear out as check_cxx_source_compiles caches the result
check_cxx_source_compiles("${_code}" _dep_warning_result)
assert_var_bool_value(_dep_warning_result ${_dep_warning_as_error_result_expected})
endif()
endfunction()
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