diff --git a/cmake/GenerateExportHeader.cmake b/cmake/GenerateExportHeader.cmake index 0a28f675e1..f41226ea28 100644 --- a/cmake/GenerateExportHeader.cmake +++ b/cmake/GenerateExportHeader.cmake @@ -203,254 +203,254 @@ include(CheckCXXCompilerFlag) # TODO: Install this macro separately? macro(_check_cxx_compiler_attribute _ATTRIBUTE _RESULT) - check_cxx_source_compiles("${_ATTRIBUTE} int somefunc() { return 0; } + check_cxx_source_compiles("${_ATTRIBUTE} int somefunc() { return 0; } int main() { return somefunc();}" ${_RESULT} - ) + ) endmacro() # TODO: Install this macro separately? macro(_check_c_compiler_attribute _ATTRIBUTE _RESULT) - check_c_source_compiles("${_ATTRIBUTE} int somefunc() { return 0; } + check_c_source_compiles("${_ATTRIBUTE} int somefunc() { return 0; } int main() { return somefunc();}" ${_RESULT} - ) + ) endmacro() macro(_test_compiler_hidden_visibility) - if(CMAKE_COMPILER_IS_GNUCXX AND CMAKE_CXX_COMPILER_VERSION VERSION_LESS "4.2") - set(GCC_TOO_OLD TRUE) - elseif(CMAKE_COMPILER_IS_GNUCC AND CMAKE_C_COMPILER_VERSION VERSION_LESS "4.2") - set(GCC_TOO_OLD TRUE) - elseif(CMAKE_CXX_COMPILER_ID STREQUAL "Intel" AND CMAKE_CXX_COMPILER_VERSION VERSION_LESS "12.0") - set(_INTEL_TOO_OLD TRUE) - endif() - - # Exclude XL here because it misinterprets -fvisibility=hidden even though - # the check_cxx_compiler_flag passes - if(NOT GCC_TOO_OLD - AND NOT _INTEL_TOO_OLD - AND NOT WIN32 - AND NOT CYGWIN - AND NOT CMAKE_CXX_COMPILER_ID MATCHES "^(IBMClang|XLClang|XL)$" - AND NOT CMAKE_CXX_COMPILER_ID MATCHES "^(PGI|NVHPC)$" - AND NOT CMAKE_CXX_COMPILER_ID MATCHES Watcom) - if (CMAKE_CXX_COMPILER_LOADED) - check_cxx_compiler_flag(-fvisibility=hidden COMPILER_HAS_HIDDEN_VISIBILITY) - check_cxx_compiler_flag(-fvisibility-inlines-hidden - COMPILER_HAS_HIDDEN_INLINE_VISIBILITY) - else() - check_c_compiler_flag(-fvisibility=hidden COMPILER_HAS_HIDDEN_VISIBILITY) - check_c_compiler_flag(-fvisibility-inlines-hidden - COMPILER_HAS_HIDDEN_INLINE_VISIBILITY) - endif() + if(CMAKE_COMPILER_IS_GNUCXX AND CMAKE_CXX_COMPILER_VERSION VERSION_LESS "4.2") + set(GCC_TOO_OLD TRUE) + elseif(CMAKE_COMPILER_IS_GNUCC AND CMAKE_C_COMPILER_VERSION VERSION_LESS "4.2") + set(GCC_TOO_OLD TRUE) + elseif(CMAKE_CXX_COMPILER_ID STREQUAL "Intel" AND CMAKE_CXX_COMPILER_VERSION VERSION_LESS "12.0") + set(_INTEL_TOO_OLD TRUE) + endif() + + # Exclude XL here because it misinterprets -fvisibility=hidden even though + # the check_cxx_compiler_flag passes + if(NOT GCC_TOO_OLD + AND NOT _INTEL_TOO_OLD + AND NOT WIN32 + AND NOT CYGWIN + AND NOT CMAKE_CXX_COMPILER_ID MATCHES "^(IBMClang|XLClang|XL)$" + AND NOT CMAKE_CXX_COMPILER_ID MATCHES "^(PGI|NVHPC)$" + AND NOT CMAKE_CXX_COMPILER_ID MATCHES Watcom) + if (CMAKE_CXX_COMPILER_LOADED) + check_cxx_compiler_flag(-fvisibility=hidden COMPILER_HAS_HIDDEN_VISIBILITY) + check_cxx_compiler_flag(-fvisibility-inlines-hidden + COMPILER_HAS_HIDDEN_INLINE_VISIBILITY) + else() + check_c_compiler_flag(-fvisibility=hidden COMPILER_HAS_HIDDEN_VISIBILITY) + check_c_compiler_flag(-fvisibility-inlines-hidden + COMPILER_HAS_HIDDEN_INLINE_VISIBILITY) endif() + endif() endmacro() macro(_test_compiler_has_deprecated) - # NOTE: Some Embarcadero compilers silently compile __declspec(deprecated) - # without error, but this is not a documented feature and the attribute does - # not actually generate any warnings. - if(CMAKE_CXX_COMPILER_ID MATCHES Borland - OR CMAKE_CXX_COMPILER_ID MATCHES Embarcadero - OR CMAKE_CXX_COMPILER_ID MATCHES HP - OR GCC_TOO_OLD - OR CMAKE_CXX_COMPILER_ID MATCHES "^(PGI|NVHPC)$" - OR CMAKE_CXX_COMPILER_ID MATCHES Watcom) - set(COMPILER_HAS_DEPRECATED "" CACHE INTERNAL - "Compiler support for a deprecated attribute") + # NOTE: Some Embarcadero compilers silently compile __declspec(deprecated) + # without error, but this is not a documented feature and the attribute does + # not actually generate any warnings. + if(CMAKE_CXX_COMPILER_ID MATCHES Borland + OR CMAKE_CXX_COMPILER_ID MATCHES Embarcadero + OR CMAKE_CXX_COMPILER_ID MATCHES HP + OR GCC_TOO_OLD + OR CMAKE_CXX_COMPILER_ID MATCHES "^(PGI|NVHPC)$" + OR CMAKE_CXX_COMPILER_ID MATCHES Watcom) + set(COMPILER_HAS_DEPRECATED "" CACHE INTERNAL + "Compiler support for a deprecated attribute") + else() + if (CMAKE_CXX_COMPILER_LOADED) + _check_cxx_compiler_attribute("__attribute__((__deprecated__))" + COMPILER_HAS_DEPRECATED_ATTR) + if(COMPILER_HAS_DEPRECATED_ATTR) + set(COMPILER_HAS_DEPRECATED "${COMPILER_HAS_DEPRECATED_ATTR}" + CACHE INTERNAL "Compiler support for a deprecated attribute") + else() + _check_cxx_compiler_attribute("__declspec(deprecated)" + COMPILER_HAS_DEPRECATED) + endif() else() - if (CMAKE_CXX_COMPILER_LOADED) - _check_cxx_compiler_attribute("__attribute__((__deprecated__))" - COMPILER_HAS_DEPRECATED_ATTR) - if(COMPILER_HAS_DEPRECATED_ATTR) - set(COMPILER_HAS_DEPRECATED "${COMPILER_HAS_DEPRECATED_ATTR}" - CACHE INTERNAL "Compiler support for a deprecated attribute") - else() - _check_cxx_compiler_attribute("__declspec(deprecated)" - COMPILER_HAS_DEPRECATED) - endif() - else() - _check_c_compiler_attribute("__attribute__((__deprecated__))" - COMPILER_HAS_DEPRECATED_ATTR) - if(COMPILER_HAS_DEPRECATED_ATTR) - set(COMPILER_HAS_DEPRECATED "${COMPILER_HAS_DEPRECATED_ATTR}" - CACHE INTERNAL "Compiler support for a deprecated attribute") - else() - _check_c_compiler_attribute("__declspec(deprecated)" - COMPILER_HAS_DEPRECATED) - endif() - - endif() + _check_c_compiler_attribute("__attribute__((__deprecated__))" + COMPILER_HAS_DEPRECATED_ATTR) + if(COMPILER_HAS_DEPRECATED_ATTR) + set(COMPILER_HAS_DEPRECATED "${COMPILER_HAS_DEPRECATED_ATTR}" + CACHE INTERNAL "Compiler support for a deprecated attribute") + else() + _check_c_compiler_attribute("__declspec(deprecated)" + COMPILER_HAS_DEPRECATED) + endif() + endif() + endif() endmacro() get_filename_component(_GENERATE_EXPORT_HEADER_MODULE_DIR - "${CMAKE_CURRENT_LIST_FILE}" PATH) + "${CMAKE_CURRENT_LIST_FILE}" PATH) macro(_DO_SET_MACRO_VALUES TARGET_LIBRARY) - set(DEFINE_DEPRECATED) - set(DEFINE_EXPORT) - set(DEFINE_IMPORT) - set(DEFINE_NO_EXPORT) - - if (COMPILER_HAS_DEPRECATED_ATTR) - set(DEFINE_DEPRECATED "__attribute__ ((__deprecated__))") - elseif(COMPILER_HAS_DEPRECATED) - set(DEFINE_DEPRECATED "__declspec(deprecated)") - endif() - - get_property(type TARGET ${TARGET_LIBRARY} PROPERTY TYPE) - - if(NOT ${type} STREQUAL "STATIC_LIBRARY") - if(WIN32 OR CYGWIN) - set(DEFINE_EXPORT "__declspec(dllexport)") - set(DEFINE_IMPORT "__declspec(dllimport)") - elseif(COMPILER_HAS_HIDDEN_VISIBILITY) - set(DEFINE_EXPORT "__attribute__((visibility(\"default\")))") - set(DEFINE_IMPORT "__attribute__((visibility(\"default\")))") - set(DEFINE_NO_EXPORT "__attribute__((visibility(\"hidden\")))") - endif() + set(DEFINE_DEPRECATED) + set(DEFINE_EXPORT) + set(DEFINE_IMPORT) + set(DEFINE_NO_EXPORT) + + if (COMPILER_HAS_DEPRECATED_ATTR) + set(DEFINE_DEPRECATED "__attribute__ ((__deprecated__))") + elseif(COMPILER_HAS_DEPRECATED) + set(DEFINE_DEPRECATED "__declspec(deprecated)") + endif() + + get_property(type TARGET ${TARGET_LIBRARY} PROPERTY TYPE) + + if(NOT ${type} STREQUAL "STATIC_LIBRARY") + if(WIN32 OR CYGWIN) + set(DEFINE_EXPORT "__declspec(dllexport)") + set(DEFINE_IMPORT "__declspec(dllimport)") + elseif(COMPILER_HAS_HIDDEN_VISIBILITY) + set(DEFINE_EXPORT "__attribute__((visibility(\"default\")))") + set(DEFINE_IMPORT "__attribute__((visibility(\"default\")))") + set(DEFINE_NO_EXPORT "__attribute__((visibility(\"hidden\")))") endif() + endif() endmacro() macro(_DO_GENERATE_EXPORT_HEADER TARGET_LIBRARY) - # Option overrides - set(options DEFINE_NO_DEPRECATED) - set(oneValueArgs PREFIX_NAME BASE_NAME EXPORT_MACRO_NAME EXPORT_FILE_NAME - DEPRECATED_MACRO_NAME NO_EXPORT_MACRO_NAME STATIC_DEFINE - NO_DEPRECATED_MACRO_NAME CUSTOM_CONTENT_FROM_VARIABLE INCLUDE_GUARD_NAME) - set(multiValueArgs) - - cmake_parse_arguments(_GEH "${options}" "${oneValueArgs}" "${multiValueArgs}" - ${ARGN}) - - set(BASE_NAME "${TARGET_LIBRARY}") - - if(_GEH_BASE_NAME) - set(BASE_NAME ${_GEH_BASE_NAME}) - endif() - - string(TOUPPER ${BASE_NAME} BASE_NAME_UPPER) - string(TOLOWER ${BASE_NAME} BASE_NAME_LOWER) - - # Default options - set(EXPORT_MACRO_NAME "${_GEH_PREFIX_NAME}${BASE_NAME_UPPER}_EXPORT") - set(NO_EXPORT_MACRO_NAME "${_GEH_PREFIX_NAME}${BASE_NAME_UPPER}_NO_EXPORT") - set(EXPORT_FILE_NAME "${CMAKE_CURRENT_BINARY_DIR}/${BASE_NAME_LOWER}_export.h") - set(DEPRECATED_MACRO_NAME "${_GEH_PREFIX_NAME}${BASE_NAME_UPPER}_DEPRECATED") - set(STATIC_DEFINE "${_GEH_PREFIX_NAME}${BASE_NAME_UPPER}_STATIC_DEFINE") - set(NO_DEPRECATED_MACRO_NAME - "${_GEH_PREFIX_NAME}${BASE_NAME_UPPER}_NO_DEPRECATED") - - if(_GEH_UNPARSED_ARGUMENTS) - message(FATAL_ERROR "Unknown keywords given to GENERATE_EXPORT_HEADER(): \"${_GEH_UNPARSED_ARGUMENTS}\"") - endif() - - if(_GEH_EXPORT_MACRO_NAME) - set(EXPORT_MACRO_NAME ${_GEH_PREFIX_NAME}${_GEH_EXPORT_MACRO_NAME}) - endif() - string(MAKE_C_IDENTIFIER ${EXPORT_MACRO_NAME} EXPORT_MACRO_NAME) - if(_GEH_EXPORT_FILE_NAME) - if(IS_ABSOLUTE ${_GEH_EXPORT_FILE_NAME}) - set(EXPORT_FILE_NAME ${_GEH_EXPORT_FILE_NAME}) - else() - set(EXPORT_FILE_NAME "${CMAKE_CURRENT_BINARY_DIR}/${_GEH_EXPORT_FILE_NAME}") - endif() - endif() - if(_GEH_DEPRECATED_MACRO_NAME) - set(DEPRECATED_MACRO_NAME ${_GEH_PREFIX_NAME}${_GEH_DEPRECATED_MACRO_NAME}) - endif() - string(MAKE_C_IDENTIFIER ${DEPRECATED_MACRO_NAME} DEPRECATED_MACRO_NAME) - if(_GEH_NO_EXPORT_MACRO_NAME) - set(NO_EXPORT_MACRO_NAME ${_GEH_PREFIX_NAME}${_GEH_NO_EXPORT_MACRO_NAME}) - endif() - string(MAKE_C_IDENTIFIER ${NO_EXPORT_MACRO_NAME} NO_EXPORT_MACRO_NAME) - if(_GEH_STATIC_DEFINE) - set(STATIC_DEFINE ${_GEH_PREFIX_NAME}${_GEH_STATIC_DEFINE}) - endif() - string(MAKE_C_IDENTIFIER ${STATIC_DEFINE} STATIC_DEFINE) - - if(_GEH_DEFINE_NO_DEPRECATED) - set(DEFINE_NO_DEPRECATED 1) + # Option overrides + set(options DEFINE_NO_DEPRECATED) + set(oneValueArgs PREFIX_NAME BASE_NAME EXPORT_MACRO_NAME EXPORT_FILE_NAME + DEPRECATED_MACRO_NAME NO_EXPORT_MACRO_NAME STATIC_DEFINE + NO_DEPRECATED_MACRO_NAME CUSTOM_CONTENT_FROM_VARIABLE INCLUDE_GUARD_NAME) + set(multiValueArgs) + + cmake_parse_arguments(_GEH "${options}" "${oneValueArgs}" "${multiValueArgs}" + ${ARGN}) + + set(BASE_NAME "${TARGET_LIBRARY}") + + if(_GEH_BASE_NAME) + set(BASE_NAME ${_GEH_BASE_NAME}) + endif() + + string(TOUPPER ${BASE_NAME} BASE_NAME_UPPER) + string(TOLOWER ${BASE_NAME} BASE_NAME_LOWER) + + # Default options + set(EXPORT_MACRO_NAME "${_GEH_PREFIX_NAME}${BASE_NAME_UPPER}_EXPORT") + set(NO_EXPORT_MACRO_NAME "${_GEH_PREFIX_NAME}${BASE_NAME_UPPER}_NO_EXPORT") + set(EXPORT_FILE_NAME "${CMAKE_CURRENT_BINARY_DIR}/${BASE_NAME_LOWER}_export.h") + set(DEPRECATED_MACRO_NAME "${_GEH_PREFIX_NAME}${BASE_NAME_UPPER}_DEPRECATED") + set(STATIC_DEFINE "${_GEH_PREFIX_NAME}${BASE_NAME_UPPER}_STATIC_DEFINE") + set(NO_DEPRECATED_MACRO_NAME + "${_GEH_PREFIX_NAME}${BASE_NAME_UPPER}_NO_DEPRECATED") + + if(_GEH_UNPARSED_ARGUMENTS) + message(FATAL_ERROR "Unknown keywords given to GENERATE_EXPORT_HEADER(): \"${_GEH_UNPARSED_ARGUMENTS}\"") + endif() + + if(_GEH_EXPORT_MACRO_NAME) + set(EXPORT_MACRO_NAME ${_GEH_PREFIX_NAME}${_GEH_EXPORT_MACRO_NAME}) + endif() + string(MAKE_C_IDENTIFIER ${EXPORT_MACRO_NAME} EXPORT_MACRO_NAME) + if(_GEH_EXPORT_FILE_NAME) + if(IS_ABSOLUTE ${_GEH_EXPORT_FILE_NAME}) + set(EXPORT_FILE_NAME ${_GEH_EXPORT_FILE_NAME}) else() - set(DEFINE_NO_DEPRECATED 0) - endif() - - if(_GEH_NO_DEPRECATED_MACRO_NAME) - set(NO_DEPRECATED_MACRO_NAME - ${_GEH_PREFIX_NAME}${_GEH_NO_DEPRECATED_MACRO_NAME}) + set(EXPORT_FILE_NAME "${CMAKE_CURRENT_BINARY_DIR}/${_GEH_EXPORT_FILE_NAME}") endif() - string(MAKE_C_IDENTIFIER ${NO_DEPRECATED_MACRO_NAME} NO_DEPRECATED_MACRO_NAME) - - if(_GEH_INCLUDE_GUARD_NAME) - set(INCLUDE_GUARD_NAME ${_GEH_INCLUDE_GUARD_NAME}) + endif() + if(_GEH_DEPRECATED_MACRO_NAME) + set(DEPRECATED_MACRO_NAME ${_GEH_PREFIX_NAME}${_GEH_DEPRECATED_MACRO_NAME}) + endif() + string(MAKE_C_IDENTIFIER ${DEPRECATED_MACRO_NAME} DEPRECATED_MACRO_NAME) + if(_GEH_NO_EXPORT_MACRO_NAME) + set(NO_EXPORT_MACRO_NAME ${_GEH_PREFIX_NAME}${_GEH_NO_EXPORT_MACRO_NAME}) + endif() + string(MAKE_C_IDENTIFIER ${NO_EXPORT_MACRO_NAME} NO_EXPORT_MACRO_NAME) + if(_GEH_STATIC_DEFINE) + set(STATIC_DEFINE ${_GEH_PREFIX_NAME}${_GEH_STATIC_DEFINE}) + endif() + string(MAKE_C_IDENTIFIER ${STATIC_DEFINE} STATIC_DEFINE) + + if(_GEH_DEFINE_NO_DEPRECATED) + set(DEFINE_NO_DEPRECATED 1) + else() + set(DEFINE_NO_DEPRECATED 0) + endif() + + if(_GEH_NO_DEPRECATED_MACRO_NAME) + set(NO_DEPRECATED_MACRO_NAME + ${_GEH_PREFIX_NAME}${_GEH_NO_DEPRECATED_MACRO_NAME}) + endif() + string(MAKE_C_IDENTIFIER ${NO_DEPRECATED_MACRO_NAME} NO_DEPRECATED_MACRO_NAME) + + if(_GEH_INCLUDE_GUARD_NAME) + set(INCLUDE_GUARD_NAME ${_GEH_INCLUDE_GUARD_NAME}) + else() + set(INCLUDE_GUARD_NAME "${EXPORT_MACRO_NAME}_H") + endif() + + get_target_property(EXPORT_IMPORT_CONDITION ${TARGET_LIBRARY} DEFINE_SYMBOL) + + if(NOT EXPORT_IMPORT_CONDITION) + set(EXPORT_IMPORT_CONDITION ${TARGET_LIBRARY}_EXPORTS) + endif() + string(MAKE_C_IDENTIFIER ${EXPORT_IMPORT_CONDITION} EXPORT_IMPORT_CONDITION) + + if(_GEH_CUSTOM_CONTENT_FROM_VARIABLE) + if(DEFINED "${_GEH_CUSTOM_CONTENT_FROM_VARIABLE}") + set(CUSTOM_CONTENT "${${_GEH_CUSTOM_CONTENT_FROM_VARIABLE}}") else() - set(INCLUDE_GUARD_NAME "${EXPORT_MACRO_NAME}_H") + set(CUSTOM_CONTENT "") endif() + endif() - get_target_property(EXPORT_IMPORT_CONDITION ${TARGET_LIBRARY} DEFINE_SYMBOL) - - if(NOT EXPORT_IMPORT_CONDITION) - set(EXPORT_IMPORT_CONDITION ${TARGET_LIBRARY}_EXPORTS) - endif() - string(MAKE_C_IDENTIFIER ${EXPORT_IMPORT_CONDITION} EXPORT_IMPORT_CONDITION) - - if(_GEH_CUSTOM_CONTENT_FROM_VARIABLE) - if(DEFINED "${_GEH_CUSTOM_CONTENT_FROM_VARIABLE}") - set(CUSTOM_CONTENT "${${_GEH_CUSTOM_CONTENT_FROM_VARIABLE}}") - else() - set(CUSTOM_CONTENT "") - endif() - endif() - - configure_file("${_GENERATE_EXPORT_HEADER_MODULE_DIR}/exportheader.cmake.in" - "${EXPORT_FILE_NAME}" @ONLY) + configure_file("${_GENERATE_EXPORT_HEADER_MODULE_DIR}/exportheader.cmake.in" + "${EXPORT_FILE_NAME}" @ONLY) endmacro() function(GENERATE_EXPORT_HEADER TARGET_LIBRARY) - get_property(type TARGET ${TARGET_LIBRARY} PROPERTY TYPE) - if(NOT ${type} STREQUAL "STATIC_LIBRARY" - AND NOT ${type} STREQUAL "SHARED_LIBRARY" - AND NOT ${type} STREQUAL "OBJECT_LIBRARY" - AND NOT ${type} STREQUAL "MODULE_LIBRARY" - AND NOT ${type} STREQUAL "INTERFACE_LIBRARY") - message(WARNING "This macro can only be used with libraries") - return() - endif() - _test_compiler_hidden_visibility() - _test_compiler_has_deprecated() - _do_set_macro_values(${TARGET_LIBRARY}) - _do_generate_export_header(${TARGET_LIBRARY} ${ARGN}) + get_property(type TARGET ${TARGET_LIBRARY} PROPERTY TYPE) + if(NOT ${type} STREQUAL "STATIC_LIBRARY" + AND NOT ${type} STREQUAL "SHARED_LIBRARY" + AND NOT ${type} STREQUAL "OBJECT_LIBRARY" + AND NOT ${type} STREQUAL "MODULE_LIBRARY" + AND NOT ${type} STREQUAL "INTERFACE_LIBRARY") + message(WARNING "This macro can only be used with libraries") + return() + endif() + _test_compiler_hidden_visibility() + _test_compiler_has_deprecated() + _do_set_macro_values(${TARGET_LIBRARY}) + _do_generate_export_header(${TARGET_LIBRARY} ${ARGN}) endfunction() function(add_compiler_export_flags) - if(NOT CMAKE_MINIMUM_REQUIRED_VERSION VERSION_LESS 2.8.12) - message(DEPRECATION "The add_compiler_export_flags function is obsolete. Use the CXX_VISIBILITY_PRESET and VISIBILITY_INLINES_HIDDEN target properties instead.") - endif() - - _test_compiler_hidden_visibility() - _test_compiler_has_deprecated() - - option(USE_COMPILER_HIDDEN_VISIBILITY - "Use HIDDEN visibility support if available." ON) - mark_as_advanced(USE_COMPILER_HIDDEN_VISIBILITY) - if(NOT (USE_COMPILER_HIDDEN_VISIBILITY AND COMPILER_HAS_HIDDEN_VISIBILITY)) - # Just return if there are no flags to add. - return() - endif() - - set (EXTRA_FLAGS "-fvisibility=hidden") - - if(COMPILER_HAS_HIDDEN_INLINE_VISIBILITY) - set (EXTRA_FLAGS "${EXTRA_FLAGS} -fvisibility-inlines-hidden") - endif() - - # Either return the extra flags needed in the supplied argument, or to the - # CMAKE_CXX_FLAGS if no argument is supplied. - if(ARGC GREATER 0) - set(${ARGV0} "${EXTRA_FLAGS}" PARENT_SCOPE) - else() - string(APPEND CMAKE_CXX_FLAGS " ${EXTRA_FLAGS}") - set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}" PARENT_SCOPE) - endif() -endfunction() \ No newline at end of file + if(NOT CMAKE_MINIMUM_REQUIRED_VERSION VERSION_LESS 2.8.12) + message(DEPRECATION "The add_compiler_export_flags function is obsolete. Use the CXX_VISIBILITY_PRESET and VISIBILITY_INLINES_HIDDEN target properties instead.") + endif() + + _test_compiler_hidden_visibility() + _test_compiler_has_deprecated() + + option(USE_COMPILER_HIDDEN_VISIBILITY + "Use HIDDEN visibility support if available." ON) + mark_as_advanced(USE_COMPILER_HIDDEN_VISIBILITY) + if(NOT (USE_COMPILER_HIDDEN_VISIBILITY AND COMPILER_HAS_HIDDEN_VISIBILITY)) + # Just return if there are no flags to add. + return() + endif() + + set (EXTRA_FLAGS "-fvisibility=hidden") + + if(COMPILER_HAS_HIDDEN_INLINE_VISIBILITY) + set (EXTRA_FLAGS "${EXTRA_FLAGS} -fvisibility-inlines-hidden") + endif() + + # Either return the extra flags needed in the supplied argument, or to the + # CMAKE_CXX_FLAGS if no argument is supplied. + if(ARGC GREATER 0) + set(${ARGV0} "${EXTRA_FLAGS}" PARENT_SCOPE) + else() + string(APPEND CMAKE_CXX_FLAGS " ${EXTRA_FLAGS}") + set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}" PARENT_SCOPE) + endif() +endfunction()