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| 1 | +# - Check if the protoype we expect is correct. |
| 2 | +# check_prototype_definition(FUNCTION PROTOTYPE RETURN HEADER VARIABLE) |
| 3 | +# FUNCTION - The name of the function (used to check if prototype exists) |
| 4 | +# PROTOTYPE- The prototype to check. |
| 5 | +# RETURN - The return value of the function. |
| 6 | +# HEADER - The header files required. |
| 7 | +# VARIABLE - The variable to store the result. |
| 8 | +# Example: |
| 9 | +# check_prototype_definition(getpwent_r |
| 10 | +# "struct passwd *getpwent_r(struct passwd *src, char *buf, int buflen)" |
| 11 | +# "NULL" |
| 12 | +# "unistd.h;pwd.h" |
| 13 | +# SOLARIS_GETPWENT_R) |
| 14 | +# The following variables may be set before calling this macro to |
| 15 | +# modify the way the check is run: |
| 16 | +# |
| 17 | +# CMAKE_REQUIRED_FLAGS = string of compile command line flags |
| 18 | +# CMAKE_REQUIRED_DEFINITIONS = list of macros to define (-DFOO=bar) |
| 19 | +# CMAKE_REQUIRED_INCLUDES = list of include directories |
| 20 | +# CMAKE_REQUIRED_LIBRARIES = list of libraries to link |
| 21 | + |
| 22 | +#============================================================================= |
| 23 | +# Copyright 2005-2009 Kitware, Inc. |
| 24 | +# Copyright 2010-2011 Andreas Schneider <[email protected]> |
| 25 | +# |
| 26 | +# Distributed under the OSI-approved BSD License (the "License"); |
| 27 | +# see accompanying file Copyright.txt for details. |
| 28 | +# |
| 29 | +# This software is distributed WITHOUT ANY WARRANTY; without even the |
| 30 | +# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
| 31 | +# See the License for more information. |
| 32 | +#============================================================================= |
| 33 | +# (To distribute this file outside of CMake, substitute the full |
| 34 | +# License text for the above reference.) |
| 35 | +# |
| 36 | + |
| 37 | +get_filename_component(__check_proto_def_dir "${CMAKE_CURRENT_LIST_FILE}" PATH) |
| 38 | + |
| 39 | +function(CHECK_PROTOTYPE_DEFINITION _FUNCTION _PROTOTYPE _RETURN _HEADER _VARIABLE) |
| 40 | + |
| 41 | + if ("${_VARIABLE}" MATCHES "^${_VARIABLE}$") |
| 42 | + set(CHECK_PROTOTYPE_DEFINITION_CONTENT "/* */\n") |
| 43 | + |
| 44 | + set(CHECK_PROTOTYPE_DEFINITION_FLAGS ${CMAKE_REQUIRED_FLAGS}) |
| 45 | + if (CMAKE_REQUIRED_LIBRARIES) |
| 46 | + set(CHECK_PROTOTYPE_DEFINITION_LIBS |
| 47 | + "-DLINK_LIBRARIES:STRING=${CMAKE_REQUIRED_LIBRARIES}") |
| 48 | + else(CMAKE_REQUIRED_LIBRARIES) |
| 49 | + set(CHECK_PROTOTYPE_DEFINITION_LIBS) |
| 50 | + endif(CMAKE_REQUIRED_LIBRARIES) |
| 51 | + if (CMAKE_REQUIRED_INCLUDES) |
| 52 | + set(CMAKE_SYMBOL_EXISTS_INCLUDES |
| 53 | + "-DINCLUDE_DIRECTORIES:STRING=${CMAKE_REQUIRED_INCLUDES}") |
| 54 | + else(CMAKE_REQUIRED_INCLUDES) |
| 55 | + set(CMAKE_SYMBOL_EXISTS_INCLUDES) |
| 56 | + endif(CMAKE_REQUIRED_INCLUDES) |
| 57 | + |
| 58 | + foreach(_FILE ${_HEADER}) |
| 59 | + set(CHECK_PROTOTYPE_DEFINITION_HEADER |
| 60 | + "${CHECK_PROTOTYPE_DEFINITION_HEADER}#include <${_FILE}>\n") |
| 61 | + endforeach(_FILE) |
| 62 | + |
| 63 | + set(CHECK_PROTOTYPE_DEFINITION_SYMBOL ${_FUNCTION}) |
| 64 | + set(CHECK_PROTOTYPE_DEFINITION_PROTO ${_PROTOTYPE}) |
| 65 | + set(CHECK_PROTOTYPE_DEFINITION_RETURN ${_RETURN}) |
| 66 | + |
| 67 | + configure_file("${__check_proto_def_dir}/CheckPrototypeDefinition.c.in" |
| 68 | + "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/CheckPrototypeDefinition.c" @ONLY) |
| 69 | + |
| 70 | + file(READ ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/CheckPrototypeDefinition.c _SOURCE) |
| 71 | + |
| 72 | + try_compile(${_VARIABLE} |
| 73 | + ${CMAKE_BINARY_DIR} |
| 74 | + ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/CheckPrototypeDefinition.c |
| 75 | + COMPILE_DEFINITIONS ${CMAKE_REQUIRED_DEFINITIONS} |
| 76 | + CMAKE_FLAGS -DCOMPILE_DEFINITIONS:STRING=${CHECK_PROTOTYPE_DEFINITION_FLAGS} |
| 77 | + "${CHECK_PROTOTYPE_DEFINITION_LIBS}" |
| 78 | + "${CMAKE_SYMBOL_EXISTS_INCLUDES}" |
| 79 | + OUTPUT_VARIABLE OUTPUT) |
| 80 | + |
| 81 | + if (${_VARIABLE}) |
| 82 | + set(${_VARIABLE} 1 CACHE INTERNAL "Have correct prototype for ${_FUNCTION}") |
| 83 | + message(STATUS "Checking prototype ${_FUNCTION} for ${_VARIABLE} - True") |
| 84 | + file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log |
| 85 | + "Determining if the prototype ${_FUNCTION} exists for ${_VARIABLE} passed with the following output:\n" |
| 86 | + "${OUTPUT}\n\n") |
| 87 | + else (${_VARIABLE}) |
| 88 | + message(STATUS "Checking prototype ${_FUNCTION} for ${_VARIABLE} - False") |
| 89 | + set(${_VARIABLE} 0 CACHE INTERNAL "Have correct prototype for ${_FUNCTION}") |
| 90 | + file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log |
| 91 | + "Determining if the prototype ${_FUNCTION} exists for ${_VARIABLE} failed with the following output:\n" |
| 92 | + "${OUTPUT}\n\n${_SOURCE}\n\n") |
| 93 | + endif (${_VARIABLE}) |
| 94 | + endif("${_VARIABLE}" MATCHES "^${_VARIABLE}$") |
| 95 | + |
| 96 | +endfunction(CHECK_PROTOTYPE_DEFINITION) |
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