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110 lines
3.8 KiB
110 lines
3.8 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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#
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# Check if the protoype we expect is correct.
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#
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# check_prototype_definition(FUNCTION PROTOTYPE RETURN HEADER VARIABLE)
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#
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# ::
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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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#
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# Example:
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#
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# ::
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#
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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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#
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# The following variables may be set before calling this macro to modify
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# the way the check is run:
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#
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# ::
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#
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# CMAKE_REQUIRED_FLAGS = string of compile command line flags
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# CMAKE_REQUIRED_DEFINITIONS = list of macros to define (-DFOO=bar)
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# CMAKE_REQUIRED_INCLUDES = list of include directories
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# CMAKE_REQUIRED_LIBRARIES = list of libraries to link
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# CMAKE_REQUIRED_QUIET = execute quietly without messages
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#
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get_filename_component(__check_proto_def_dir "${CMAKE_CURRENT_LIST_FILE}" PATH)
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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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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_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 ${_RETURN})
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configure_file("${__check_proto_def_dir}/CheckPrototypeDefinition.c.in"
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"${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/CheckPrototypeDefinition.c" @ONLY)
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file(READ ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/CheckPrototypeDefinition.c _SOURCE)
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try_compile(${_VARIABLE}
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${CMAKE_BINARY_DIR}
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${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/CheckPrototypeDefinition.c
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COMPILE_DEFINITIONS ${CMAKE_REQUIRED_DEFINITIONS}
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${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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OUTPUT_VARIABLE OUTPUT)
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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(STATUS "Checking prototype ${_FUNCTION} for ${_VARIABLE} - True")
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endif()
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file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
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"Determining if the prototype ${_FUNCTION} exists for ${_VARIABLE} passed with the following output:\n"
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"${OUTPUT}\n\n")
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else ()
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if(NOT CMAKE_REQUIRED_QUIET)
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message(STATUS "Checking prototype ${_FUNCTION} for ${_VARIABLE} - False")
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endif()
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set(${_VARIABLE} 0 CACHE INTERNAL "Have correct prototype for ${_FUNCTION}")
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file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
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"Determining if the prototype ${_FUNCTION} exists for ${_VARIABLE} failed with the following output:\n"
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"${OUTPUT}\n\n${_SOURCE}\n\n")
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endif ()
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endif()
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endfunction()
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