mirror of
https://github.com/reactos/CMake.git
synced 2024-12-05 02:06:34 +00:00
444 lines
15 KiB
CMake
444 lines
15 KiB
CMake
# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
|
|
# file Copyright.txt or https://cmake.org/licensing for details.
|
|
|
|
#[=======================================================================[.rst:
|
|
GenerateExportHeader
|
|
--------------------
|
|
|
|
Function for generation of export macros for libraries
|
|
|
|
This module provides the function GENERATE_EXPORT_HEADER().
|
|
|
|
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>]
|
|
[INCLUDE_GUARD_NAME <include_guard_name>]
|
|
[STATIC_DEFINE <static_define>]
|
|
[NO_DEPRECATED_MACRO_NAME <no_deprecated_macro_name>]
|
|
[DEFINE_NO_DEPRECATED]
|
|
[PREFIX_NAME <prefix_name>]
|
|
[CUSTOM_CONTENT_FROM_VARIABLE <variable>]
|
|
)
|
|
|
|
|
|
The target properties :prop_tgt:`CXX_VISIBILITY_PRESET <<LANG>_VISIBILITY_PRESET>`
|
|
and :prop_tgt:`VISIBILITY_INLINES_HIDDEN` can be used to add the appropriate
|
|
compile flags for targets. See the documentation of those target properties,
|
|
and the convenience variables
|
|
:variable:`CMAKE_CXX_VISIBILITY_PRESET <CMAKE_<LANG>_VISIBILITY_PRESET>` and
|
|
:variable:`CMAKE_VISIBILITY_INLINES_HIDDEN`.
|
|
|
|
By default ``GENERATE_EXPORT_HEADER()`` generates macro names in a file
|
|
name determined by the name of the library. This means that in the
|
|
simplest case, users of ``GenerateExportHeader`` will be equivalent to:
|
|
|
|
.. code-block:: cmake
|
|
|
|
set(CMAKE_CXX_VISIBILITY_PRESET hidden)
|
|
set(CMAKE_VISIBILITY_INLINES_HIDDEN 1)
|
|
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 ${INCLUDE_INSTALL_DIR}
|
|
)
|
|
|
|
|
|
And in the ABI header files:
|
|
|
|
.. code-block:: c++
|
|
|
|
#include "somelib_export.h"
|
|
class SOMELIB_EXPORT SomeClass {
|
|
...
|
|
};
|
|
|
|
|
|
The CMake fragment will generate a file in the
|
|
``${CMAKE_CURRENT_BINARY_DIR}`` called ``somelib_export.h`` containing the
|
|
macros ``SOMELIB_EXPORT``, ``SOMELIB_NO_EXPORT``, ``SOMELIB_DEPRECATED``,
|
|
``SOMELIB_DEPRECATED_EXPORT`` and ``SOMELIB_DEPRECATED_NO_EXPORT``.
|
|
They will be followed by content taken from the variable specified by
|
|
the ``CUSTOM_CONTENT_FROM_VARIABLE`` option, if any.
|
|
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:
|
|
|
|
.. code-block:: cmake
|
|
|
|
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 specifying other options in the
|
|
function. For example:
|
|
|
|
.. code-block:: cmake
|
|
|
|
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:
|
|
|
|
.. code-block:: cmake
|
|
|
|
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:
|
|
|
|
.. code-block:: cmake
|
|
|
|
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:
|
|
|
|
.. code-block:: cmake
|
|
|
|
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 ${NO_BUILD_DEPRECATED})
|
|
|
|
|
|
And then in somelib:
|
|
|
|
.. code-block:: c++
|
|
|
|
class SOMELIB_EXPORT SomeClass
|
|
{
|
|
public:
|
|
#ifndef SOMELIB_NO_DEPRECATED
|
|
SOMELIB_DEPRECATED void oldMethod();
|
|
#endif
|
|
};
|
|
|
|
.. code-block:: c++
|
|
|
|
#ifndef SOMELIB_NO_DEPRECATED
|
|
void SomeClass::oldMethod() { }
|
|
#endif
|
|
|
|
|
|
If ``PREFIX_NAME`` is specified, the argument will be used as a prefix to
|
|
all generated macros.
|
|
|
|
For example:
|
|
|
|
.. code-block:: cmake
|
|
|
|
generate_export_header(somelib PREFIX_NAME VTK_)
|
|
|
|
Generates the macros ``VTK_SOMELIB_EXPORT`` etc.
|
|
|
|
::
|
|
|
|
ADD_COMPILER_EXPORT_FLAGS( [<output_variable>] )
|
|
|
|
The ``ADD_COMPILER_EXPORT_FLAGS`` function adds ``-fvisibility=hidden`` to
|
|
:variable:`CMAKE_CXX_FLAGS <CMAKE_<LANG>_FLAGS>` if supported, and is a no-op
|
|
on Windows which does not need extra compiler flags for exporting support.
|
|
You may optionally pass a single argument to ``ADD_COMPILER_EXPORT_FLAGS``
|
|
that will be populated with the ``CXX_FLAGS`` required to enable visibility
|
|
support for the compiler/architecture in use.
|
|
|
|
This function is deprecated. Set the target properties
|
|
:prop_tgt:`CXX_VISIBILITY_PRESET <<LANG>_VISIBILITY_PRESET>` and
|
|
:prop_tgt:`VISIBILITY_INLINES_HIDDEN` instead.
|
|
#]=======================================================================]
|
|
|
|
include(CheckCCompilerFlag)
|
|
include(CheckCXXCompilerFlag)
|
|
|
|
# TODO: Install this macro separately?
|
|
macro(_check_cxx_compiler_attribute _ATTRIBUTE _RESULT)
|
|
check_cxx_source_compiles("${_ATTRIBUTE} int somefunc() { return 0; }
|
|
int main() { return somefunc();}" ${_RESULT}
|
|
)
|
|
endmacro()
|
|
|
|
# TODO: Install this macro separately?
|
|
macro(_check_c_compiler_attribute _ATTRIBUTE _RESULT)
|
|
check_c_source_compiles("${_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 MATCHES 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 XL
|
|
AND NOT CMAKE_CXX_COMPILER_ID MATCHES PGI
|
|
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
|
|
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()
|
|
_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)
|
|
|
|
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 ${type} STREQUAL "STATIC_LIBRARY")
|
|
if(WIN32 OR CYGWIN)
|
|
set(DEFINE_EXPORT "__declspec(dllexport)")
|
|
set(DEFINE_IMPORT "__declspec(dllimport)")
|
|
elseif(COMPILER_HAS_HIDDEN_VISIBILITY)
|
|
set(DEFINE_EXPORT "__attribute__((visibility(\"default\")))")
|
|
set(DEFINE_IMPORT "__attribute__((visibility(\"default\")))")
|
|
set(DEFINE_NO_EXPORT "__attribute__((visibility(\"hidden\")))")
|
|
endif()
|
|
endif()
|
|
endmacro()
|
|
|
|
macro(_DO_GENERATE_EXPORT_HEADER TARGET_LIBRARY)
|
|
# Option overrides
|
|
set(options DEFINE_NO_DEPRECATED)
|
|
set(oneValueArgs PREFIX_NAME BASE_NAME EXPORT_MACRO_NAME EXPORT_FILE_NAME
|
|
DEPRECATED_MACRO_NAME NO_EXPORT_MACRO_NAME STATIC_DEFINE
|
|
NO_DEPRECATED_MACRO_NAME CUSTOM_CONTENT_FROM_VARIABLE INCLUDE_GUARD_NAME)
|
|
set(multiValueArgs)
|
|
|
|
cmake_parse_arguments(_GEH "${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)
|
|
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(CUSTOM_CONTENT "")
|
|
endif()
|
|
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(NOT ${type} STREQUAL "STATIC_LIBRARY"
|
|
AND NOT ${type} STREQUAL "SHARED_LIBRARY"
|
|
AND NOT ${type} STREQUAL "OBJECT_LIBRARY"
|
|
AND NOT ${type} STREQUAL "MODULE_LIBRARY")
|
|
message(WARNING "This macro can only be used with libraries")
|
|
return()
|
|
endif()
|
|
_test_compiler_hidden_visibility()
|
|
_test_compiler_has_deprecated()
|
|
_do_set_macro_values(${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()
|