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121 lines
3.7 KiB
121 lines
3.7 KiB
# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
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# file Copyright.txt or https://cmake.org/licensing for details.
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#[=======================================================================[.rst:
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CheckPrototypeDefinition
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------------------------
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Check if the prototype we expect is correct.
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.. command:: check_prototype_definition
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.. code-block:: cmake
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check_prototype_definition(FUNCTION PROTOTYPE RETURN HEADER VARIABLE)
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::
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FUNCTION - The name of the function (used to check if prototype exists)
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PROTOTYPE- The prototype to check.
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RETURN - The return value of the function.
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HEADER - The header files required.
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VARIABLE - The variable to store the result.
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Will be created as an internal cache variable.
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Example:
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.. code-block:: cmake
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check_prototype_definition(getpwent_r
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"struct passwd *getpwent_r(struct passwd *src, char *buf, int buflen)"
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"NULL"
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"unistd.h;pwd.h"
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SOLARIS_GETPWENT_R)
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The following variables may be set before calling this function to modify
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the way the check is run:
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.. include:: /module/CMAKE_REQUIRED_FLAGS.txt
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.. include:: /module/CMAKE_REQUIRED_DEFINITIONS.txt
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.. include:: /module/CMAKE_REQUIRED_INCLUDES.txt
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.. include:: /module/CMAKE_REQUIRED_LINK_OPTIONS.txt
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.. include:: /module/CMAKE_REQUIRED_LIBRARIES.txt
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.. include:: /module/CMAKE_REQUIRED_QUIET.txt
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#]=======================================================================]
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#
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get_filename_component(__check_proto_def_dir "${CMAKE_CURRENT_LIST_FILE}" PATH)
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include_guard(GLOBAL)
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function(check_prototype_definition _FUNCTION _PROTOTYPE _RETURN _HEADER _VARIABLE)
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if (NOT DEFINED ${_VARIABLE})
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if(NOT CMAKE_REQUIRED_QUIET)
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message(CHECK_START "Checking prototype ${_FUNCTION} for ${_VARIABLE}")
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endif()
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set(CHECK_PROTOTYPE_DEFINITION_CONTENT "/* */\n")
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set(CHECK_PROTOTYPE_DEFINITION_FLAGS ${CMAKE_REQUIRED_FLAGS})
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if (CMAKE_REQUIRED_LINK_OPTIONS)
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set(CHECK_PROTOTYPE_DEFINITION_LINK_OPTIONS
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LINK_OPTIONS ${CMAKE_REQUIRED_LINK_OPTIONS})
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else()
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set(CHECK_PROTOTYPE_DEFINITION_LINK_OPTIONS)
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endif()
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if (CMAKE_REQUIRED_LIBRARIES)
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set(CHECK_PROTOTYPE_DEFINITION_LIBS
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LINK_LIBRARIES ${CMAKE_REQUIRED_LIBRARIES})
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else()
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set(CHECK_PROTOTYPE_DEFINITION_LIBS)
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endif()
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if (CMAKE_REQUIRED_INCLUDES)
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set(CMAKE_SYMBOL_EXISTS_INCLUDES
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"-DINCLUDE_DIRECTORIES:STRING=${CMAKE_REQUIRED_INCLUDES}")
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else()
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set(CMAKE_SYMBOL_EXISTS_INCLUDES)
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endif()
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foreach(_FILE ${_HEADER})
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string(APPEND CHECK_PROTOTYPE_DEFINITION_HEADER
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"#include <${_FILE}>\n")
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endforeach()
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set(CHECK_PROTOTYPE_DEFINITION_SYMBOL ${_FUNCTION})
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set(CHECK_PROTOTYPE_DEFINITION_PROTO ${_PROTOTYPE})
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set(CHECK_PROTOTYPE_DEFINITION_RETURN ${_RETURN})
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file(READ ${__check_proto_def_dir}/CheckPrototypeDefinition.c.in _SOURCE)
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string(CONFIGURE "${_SOURCE}" _SOURCE @ONLY)
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try_compile(${_VARIABLE}
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SOURCE_FROM_VAR CheckPrototypeDefinition.c _SOURCE
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COMPILE_DEFINITIONS ${CMAKE_REQUIRED_DEFINITIONS}
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${CHECK_PROTOTYPE_DEFINITION_LINK_OPTIONS}
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${CHECK_PROTOTYPE_DEFINITION_LIBS}
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CMAKE_FLAGS -DCOMPILE_DEFINITIONS:STRING=${CHECK_PROTOTYPE_DEFINITION_FLAGS}
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"${CMAKE_SYMBOL_EXISTS_INCLUDES}"
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)
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if (${_VARIABLE})
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set(${_VARIABLE} 1 CACHE INTERNAL "Have correct prototype for ${_FUNCTION}")
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if(NOT CMAKE_REQUIRED_QUIET)
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message(CHECK_PASS "True")
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endif()
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else ()
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if(NOT CMAKE_REQUIRED_QUIET)
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message(CHECK_FAIL "False")
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endif()
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set(${_VARIABLE} 0 CACHE INTERNAL "Have correct prototype for ${_FUNCTION}")
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endif ()
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endif()
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endfunction()
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