mirror of
https://github.com/reactos/CMake.git
synced 2024-11-25 20:49:41 +00:00
41e2b1d824
Making this a macro had unintended issues on (among others) Windows compilers. Moving it back to being a function using PARENT_SCOPE still satisfies the use case where we simply want to obtain the extra flags.
378 lines
13 KiB
CMake
378 lines
13 KiB
CMake
# - Function for generation of export macros for libraries
|
|
# This module provides the function GENERATE_EXPORT_HEADER() and the
|
|
# accompanying ADD_COMPILER_EXPORT_FLAGS() function.
|
|
#
|
|
# The GENERATE_EXPORT_HEADER function can be used to generate a file suitable
|
|
# for preprocessor inclusion which contains EXPORT macros to be used in
|
|
# library classes.
|
|
#
|
|
# GENERATE_EXPORT_HEADER( LIBRARY_TARGET
|
|
# [BASE_NAME <base_name>]
|
|
# [EXPORT_MACRO_NAME <export_macro_name>]
|
|
# [EXPORT_FILE_NAME <export_file_name>]
|
|
# [DEPRECATED_MACRO_NAME <deprecated_macro_name>]
|
|
# [NO_EXPORT_MACRO_NAME <no_export_macro_name>]
|
|
# [STATIC_DEFINE <static_define>]
|
|
# [NO_DEPRECATED_MACRO_NAME <no_deprecated_macro_name>]
|
|
# [DEFINE_NO_DEPRECATED]
|
|
# [PREFIX_NAME <prefix_name>]
|
|
# )
|
|
#
|
|
# ADD_COMPILER_EXPORT_FLAGS( [FATAL_WARNINGS] )
|
|
#
|
|
# By default GENERATE_EXPORT_HEADER() generates macro names in a file name
|
|
# determined by the name of the library. The ADD_COMPILER_EXPORT_FLAGS function
|
|
# adds -fvisibility=hidden to CMAKE_CXX_FLAGS if supported, and is a no-op on
|
|
# Windows which does not need extra compiler flags for exporting support. You
|
|
# may optionally pass a single argument to ADD_COMPILER_EXPORT_FLAGS that will
|
|
# be populated with the required CXX_FLAGS required to enable visibility support
|
|
# for the compiler/architecture in use.
|
|
#
|
|
# This means that in the simplest case, users of these functions will be
|
|
# equivalent to:
|
|
#
|
|
# add_compiler_export_flags()
|
|
# add_library(somelib someclass.cpp)
|
|
# generate_export_header(somelib)
|
|
# install(TARGETS somelib DESTINATION ${LIBRARY_INSTALL_DIR})
|
|
# install(FILES
|
|
# someclass.h
|
|
# ${PROJECT_BINARY_DIR}/somelib_export.h DESTINATION ${INCLUDE_INSTALL_DIR}
|
|
# )
|
|
#
|
|
# And in the ABI header files:
|
|
#
|
|
# #include "somelib_export.h"
|
|
# class SOMELIB_EXPORT SomeClass {
|
|
# ...
|
|
# };
|
|
#
|
|
# The CMake fragment will generate a file in the ${CMAKE_CURRENT_BUILD_DIR}
|
|
# called somelib_export.h containing the macros SOMELIB_EXPORT, SOMELIB_NO_EXPORT,
|
|
# SOMELIB_DEPRECATED, SOMELIB_DEPRECATED_EXPORT and SOMELIB_DEPRECATED_NO_EXPORT.
|
|
# The resulting file should be installed with other headers in the library.
|
|
#
|
|
# The BASE_NAME argument can be used to override the file name and the names
|
|
# used for the macros
|
|
#
|
|
# add_library(somelib someclass.cpp)
|
|
# generate_export_header(somelib
|
|
# BASE_NAME other_name
|
|
# )
|
|
#
|
|
# Generates a file called other_name_export.h containing the macros
|
|
# OTHER_NAME_EXPORT, OTHER_NAME_NO_EXPORT and OTHER_NAME_DEPRECATED etc.
|
|
#
|
|
# The BASE_NAME may be overridden by specifiying other options in the function.
|
|
# For example:
|
|
#
|
|
# add_library(somelib someclass.cpp)
|
|
# generate_export_header(somelib
|
|
# EXPORT_MACRO_NAME OTHER_NAME_EXPORT
|
|
# )
|
|
#
|
|
# creates the macro OTHER_NAME_EXPORT instead of SOMELIB_EXPORT, but other macros
|
|
# and the generated file name is as default.
|
|
#
|
|
# add_library(somelib someclass.cpp)
|
|
# generate_export_header(somelib
|
|
# DEPRECATED_MACRO_NAME KDE_DEPRECATED
|
|
# )
|
|
#
|
|
# creates the macro KDE_DEPRECATED instead of SOMELIB_DEPRECATED.
|
|
#
|
|
# If LIBRARY_TARGET is a static library, macros are defined without values.
|
|
#
|
|
# If the same sources are used to create both a shared and a static library, the
|
|
# uppercased symbol ${BASE_NAME}_STATIC_DEFINE should be used when building the
|
|
# static library
|
|
#
|
|
# add_library(shared_variant SHARED ${lib_SRCS})
|
|
# add_library(static_variant ${lib_SRCS})
|
|
# generate_export_header(shared_variant BASE_NAME libshared_and_static)
|
|
# set_target_properties(static_variant PROPERTIES
|
|
# COMPILE_FLAGS -DLIBSHARED_AND_STATIC_STATIC_DEFINE)
|
|
#
|
|
# This will cause the export macros to expand to nothing when building the
|
|
# static library.
|
|
#
|
|
# If DEFINE_NO_DEPRECATED is specified, then a macro ${BASE_NAME}_NO_DEPRECATED
|
|
# will be defined
|
|
# This macro can be used to remove deprecated code from preprocessor output.
|
|
#
|
|
# option(EXCLUDE_DEPRECATED "Exclude deprecated parts of the library" FALSE)
|
|
# if (EXCLUDE_DEPRECATED)
|
|
# set(NO_BUILD_DEPRECATED DEFINE_NO_DEPRECATED)
|
|
# endif()
|
|
# generate_export_header(somelib ${NO_BUILD_DEPRECATED})
|
|
#
|
|
# And then in somelib:
|
|
#
|
|
# class SOMELIB_EXPORT SomeClass
|
|
# {
|
|
# public:
|
|
# #ifndef SOMELIB_NO_DEPRECATED
|
|
# SOMELIB_DEPRECATED void oldMethod();
|
|
# #endif
|
|
# };
|
|
#
|
|
# #ifndef SOMELIB_NO_DEPRECATED
|
|
# void SomeClass::oldMethod() { }
|
|
# #endif
|
|
#
|
|
# If PREFIX_NAME is specified, the argument will be used as a prefix to all
|
|
# generated macros.
|
|
#
|
|
# For example:
|
|
#
|
|
# generate_export_header(somelib PREFIX_NAME VTK_)
|
|
#
|
|
# Generates the macros VTK_SOMELIB_EXPORT etc.
|
|
|
|
#=============================================================================
|
|
# Copyright 2011 Stephen Kelly <steveire@gmail.com>
|
|
#
|
|
# Distributed under the OSI-approved BSD License (the "License");
|
|
# see accompanying file Copyright.txt for details.
|
|
#
|
|
# This software is distributed WITHOUT ANY WARRANTY; without even the
|
|
# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
|
|
# See the License for more information.
|
|
#=============================================================================
|
|
# (To distribute this file outside of CMake, substitute the full
|
|
# License text for the above reference.)
|
|
|
|
include(CMakeParseArguments)
|
|
include(CheckCXXCompilerFlag)
|
|
|
|
# TODO: Install this macro separately?
|
|
macro(_check_cxx_compiler_attribute _ATTRIBUTE _RESULT)
|
|
check_cxx_source_compiles("${_ATTRIBUTE} int somefunc() { return 0; }
|
|
int main() { return somefunc();}" ${_RESULT}
|
|
# Some compilers do not fail with a bad flag
|
|
FAIL_REGEX "unrecognized .*option" # GNU
|
|
FAIL_REGEX "ignoring unknown option" # MSVC
|
|
FAIL_REGEX "warning D9002" # MSVC, any lang
|
|
FAIL_REGEX "[Uu]nknown option" # HP
|
|
FAIL_REGEX "[Ww]arning: [Oo]ption" # SunPro
|
|
FAIL_REGEX "command option .* is not recognized" # XL
|
|
)
|
|
endmacro()
|
|
|
|
macro(_test_compiler_hidden_visibility)
|
|
|
|
if(CMAKE_COMPILER_IS_GNUCXX)
|
|
exec_program(${CMAKE_C_COMPILER} ARGS --version
|
|
OUTPUT_VARIABLE _gcc_version_info)
|
|
string(REGEX MATCH "[345]\\.[0-9]\\.[0-9]"
|
|
_gcc_version "${_gcc_version_info}")
|
|
# gcc on mac just reports: "gcc (GCC) 3.3 20030304 ..." without the
|
|
# patch level, handle this here:
|
|
if(NOT _gcc_version)
|
|
string(REGEX REPLACE ".*\\(GCC\\).* ([34]\\.[0-9]) .*" "\\1.0"
|
|
_gcc_version "${_gcc_version_info}")
|
|
endif()
|
|
|
|
if(${_gcc_version} VERSION_LESS "4.2")
|
|
set(GCC_TOO_OLD TRUE)
|
|
message(WARNING "GCC version older than 4.2")
|
|
endif()
|
|
endif()
|
|
|
|
if(CMAKE_CXX_COMPILER_ID MATCHES Intel)
|
|
exec_program(${CMAKE_CXX_COMPILER} ARGS -V
|
|
OUTPUT_VARIABLE _intel_version_info)
|
|
string(REGEX REPLACE ".*Version ([0-9]+(\\.[0-9]+)+).*" "\\1"
|
|
_intel_version "${_intel_version_info}")
|
|
|
|
if(${_intel_version} VERSION_LESS "12.0")
|
|
set(_INTEL_TOO_OLD TRUE)
|
|
message(WARNING "Intel compiler older than 12.0")
|
|
endif()
|
|
endif()
|
|
|
|
|
|
# Exclude XL here because it misinterprets -fvisibility=hidden even though
|
|
# the check_cxx_compiler_flag passes
|
|
# http://www.cdash.org/CDash/testDetails.php?test=109109951&build=1419259
|
|
if(NOT GCC_TOO_OLD
|
|
AND NOT _INTEL_TOO_OLD
|
|
AND NOT WIN32
|
|
AND NOT CYGWIN
|
|
AND NOT "${CMAKE_CXX_COMPILER_ID}" MATCHES XL
|
|
AND NOT "${CMAKE_CXX_COMPILER_ID}" MATCHES PGI
|
|
AND NOT "${CMAKE_CXX_COMPILER_ID}" MATCHES Watcom)
|
|
check_cxx_compiler_flag(-fvisibility=hidden COMPILER_HAS_HIDDEN_VISIBILITY)
|
|
check_cxx_compiler_flag(-fvisibility-inlines-hidden
|
|
COMPILER_HAS_HIDDEN_INLINE_VISIBILITY)
|
|
option(USE_COMPILER_HIDDEN_VISIBILITY
|
|
"Use HIDDEN visibility support if available." ON)
|
|
mark_as_advanced(USE_COMPILER_HIDDEN_VISIBILITY)
|
|
endif()
|
|
endmacro()
|
|
|
|
macro(_test_compiler_has_deprecated)
|
|
if("${CMAKE_CXX_COMPILER_ID}" MATCHES Borland
|
|
OR "${CMAKE_CXX_COMPILER_ID}" MATCHES HP
|
|
OR GCC_TOO_OLD
|
|
OR "${CMAKE_CXX_COMPILER_ID}" MATCHES PGI
|
|
OR "${CMAKE_CXX_COMPILER_ID}" MATCHES Watcom)
|
|
set(COMPILER_HAS_DEPRECATED "" CACHE INTERNAL
|
|
"Compiler support for a deprecated attribute")
|
|
else()
|
|
_check_cxx_compiler_attribute("__attribute__((__deprecated__))"
|
|
COMPILER_HAS_DEPRECATED_ATTR)
|
|
if(COMPILER_HAS_DEPRECATED_ATTR)
|
|
set(COMPILER_HAS_DEPRECATED "${COMPILER_HAS_DEPRECATED_ATTR}"
|
|
CACHE INTERNAL "Compiler support for a deprecated attribute")
|
|
else()
|
|
_check_cxx_compiler_attribute("__declspec(deprecated)"
|
|
COMPILER_HAS_DEPRECATED)
|
|
endif()
|
|
endif()
|
|
endmacro()
|
|
|
|
get_filename_component(_GENERATE_EXPORT_HEADER_MODULE_DIR
|
|
"${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 ${type} STREQUAL "STATIC_LIBRARY")
|
|
if(WIN32)
|
|
set(DEFINE_EXPORT "__declspec(dllexport)")
|
|
set(DEFINE_IMPORT "__declspec(dllimport)")
|
|
elseif(COMPILER_HAS_HIDDEN_VISIBILITY AND USE_COMPILER_HIDDEN_VISIBILITY)
|
|
set(DEFINE_EXPORT "__attribute__((visibility(\"default\")))")
|
|
set(DEFINE_IMPORT "__attribute__((visibility(\"default\")))")
|
|
set(DEFINE_NO_EXPORT "__attribute__((visibility(\"hidden\")))")
|
|
endif()
|
|
endif()
|
|
endmacro()
|
|
|
|
macro(_DO_GENERATE_EXPORT_HEADER TARGET_LIBRARY)
|
|
# Option overrides
|
|
set(options DEFINE_NO_DEPRECATED)
|
|
set(oneValueArgs PREFIX_NAME BASE_NAME EXPORT_MACRO_NAME EXPORT_FILE_NAME
|
|
DEPRECATED_MACRO_NAME NO_EXPORT_MACRO_NAME STATIC_DEFINE
|
|
NO_DEPRECATED_MACRO_NAME)
|
|
set(multiValueArgs)
|
|
|
|
cmake_parse_arguments(_GEH "${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()
|
|
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()
|
|
if(_GEH_NO_EXPORT_MACRO_NAME)
|
|
set(NO_EXPORT_MACRO_NAME ${_GEH_PREFIX_NAME}${_GEH_NO_EXPORT_MACRO_NAME})
|
|
endif()
|
|
if(_GEH_STATIC_DEFINE)
|
|
set(STATIC_DEFINE ${_GEH_PREFIX_NAME}${_GEH_STATIC_DEFINE})
|
|
endif()
|
|
|
|
if(_GEH_DEFINE_NO_DEPRECATED)
|
|
set(DEFINE_NO_DEPRECATED TRUE)
|
|
endif()
|
|
|
|
if(_GEH_NO_DEPRECATED_MACRO_NAME)
|
|
set(NO_DEPRECATED_MACRO_NAME
|
|
${_GEH_PREFIX_NAME}${_GEH_NO_DEPRECATED_MACRO_NAME})
|
|
endif()
|
|
|
|
set(INCLUDE_GUARD_NAME "${EXPORT_MACRO_NAME}_H")
|
|
|
|
get_target_property(EXPORT_IMPORT_CONDITION ${TARGET_LIBRARY} DEFINE_SYMBOL)
|
|
|
|
if(NOT EXPORT_IMPORT_CONDITION)
|
|
set(EXPORT_IMPORT_CONDITION ${TARGET_LIBRARY}_EXPORTS)
|
|
endif()
|
|
|
|
configure_file("${_GENERATE_EXPORT_HEADER_MODULE_DIR}/exportheader.cmake.in"
|
|
"${EXPORT_FILE_NAME}" @ONLY)
|
|
endmacro()
|
|
|
|
function(GENERATE_EXPORT_HEADER TARGET_LIBRARY)
|
|
get_property(type TARGET ${TARGET_LIBRARY} PROPERTY TYPE)
|
|
if(${type} STREQUAL "MODULE")
|
|
message(WARNING "This macro should not be used with libraries of type MODULE")
|
|
return()
|
|
endif()
|
|
if(NOT ${type} STREQUAL "STATIC_LIBRARY" AND NOT ${type} STREQUAL "SHARED_LIBRARY")
|
|
message(WARNING "This macro can only be used with libraries")
|
|
return()
|
|
endif()
|
|
_test_compiler_hidden_visibility()
|
|
_test_compiler_has_deprecated()
|
|
_do_set_macro_values(${TARGET_LIBRARY})
|
|
_do_generate_export_header(${TARGET_LIBRARY} ${ARGN})
|
|
endfunction()
|
|
|
|
function(add_compiler_export_flags)
|
|
|
|
_test_compiler_hidden_visibility()
|
|
_test_compiler_has_deprecated()
|
|
|
|
if(NOT (USE_COMPILER_HIDDEN_VISIBILITY AND COMPILER_HAS_HIDDEN_VISIBILITY))
|
|
# Just return if there are no flags to add.
|
|
return()
|
|
endif()
|
|
|
|
set (EXTRA_FLAGS "-fvisibility=hidden")
|
|
|
|
if(COMPILER_HAS_HIDDEN_INLINE_VISIBILITY)
|
|
set (EXTRA_FLAGS "${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(ARGV0)
|
|
set(${ARGV0} "${EXTRA_FLAGS}" PARENT_SCOPE)
|
|
else()
|
|
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${EXTRA_FLAGS}" PARENT_SCOPE)
|
|
endif()
|
|
endfunction()
|