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https://github.com/Kitware/CMake.git
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4ffec8f666
The cleanup in commit 4f2fcce4 (Check*: Allow result variables to
contain regex special characters, 2014-07-31) broke old VXL code that
abuses the old "if(MATCHES)" implementation by using
SET( ${VARIABLE} ${VARIABLE} )
to reset a check result variable. Add a compatibility hack to the
CheckFunctionExists, CheckIncludeFileCXX, and CheckSymbolExists modules
to re-run their checks when the result variable is set to its own name.
Use STREQUAL instead of MATCHES so that special characters still work.
99 lines
3.4 KiB
CMake
99 lines
3.4 KiB
CMake
#.rst:
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# CheckIncludeFileCXX
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# -------------------
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#
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# Check if the include file exists.
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#
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# ::
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#
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# CHECK_INCLUDE_FILE_CXX(INCLUDE VARIABLE)
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#
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#
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#
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# ::
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#
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# INCLUDE - name of include file
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# VARIABLE - variable to return result
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#
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#
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#
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# An optional third argument is the CFlags to add to the compile line or
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# you can use CMAKE_REQUIRED_FLAGS.
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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_QUIET = execute quietly without messages
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#=============================================================================
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# Copyright 2002-2009 Kitware, Inc.
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#
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# Distributed under the OSI-approved BSD License (the "License");
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# see accompanying file Copyright.txt for details.
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#
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# This software is distributed WITHOUT ANY WARRANTY; without even the
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# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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# See the License for more information.
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#=============================================================================
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# (To distribute this file outside of CMake, substitute the full
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# License text for the above reference.)
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macro(CHECK_INCLUDE_FILE_CXX INCLUDE VARIABLE)
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if(NOT DEFINED "${VARIABLE}" OR "x${${VARIABLE}}" STREQUAL "x${VARIABLE}")
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if(CMAKE_REQUIRED_INCLUDES)
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set(CHECK_INCLUDE_FILE_CXX_INCLUDE_DIRS "-DINCLUDE_DIRECTORIES=${CMAKE_REQUIRED_INCLUDES}")
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else()
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set(CHECK_INCLUDE_FILE_CXX_INCLUDE_DIRS)
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endif()
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set(MACRO_CHECK_INCLUDE_FILE_FLAGS ${CMAKE_REQUIRED_FLAGS})
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set(CHECK_INCLUDE_FILE_VAR ${INCLUDE})
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configure_file(${CMAKE_ROOT}/Modules/CheckIncludeFile.cxx.in
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${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/CheckIncludeFile.cxx)
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if(NOT CMAKE_REQUIRED_QUIET)
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message(STATUS "Looking for C++ include ${INCLUDE}")
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endif()
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if(${ARGC} EQUAL 3)
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set(CMAKE_CXX_FLAGS_SAVE ${CMAKE_CXX_FLAGS})
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set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${ARGV2}")
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endif()
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try_compile(${VARIABLE}
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${CMAKE_BINARY_DIR}
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${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/CheckIncludeFile.cxx
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COMPILE_DEFINITIONS ${CMAKE_REQUIRED_DEFINITIONS}
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CMAKE_FLAGS
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-DCOMPILE_DEFINITIONS:STRING=${MACRO_CHECK_INCLUDE_FILE_FLAGS}
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"${CHECK_INCLUDE_FILE_CXX_INCLUDE_DIRS}"
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OUTPUT_VARIABLE OUTPUT)
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if(${ARGC} EQUAL 3)
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set(CMAKE_CXX_FLAGS ${CMAKE_CXX_FLAGS_SAVE})
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endif()
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if(${VARIABLE})
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if(NOT CMAKE_REQUIRED_QUIET)
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message(STATUS "Looking for C++ include ${INCLUDE} - found")
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endif()
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set(${VARIABLE} 1 CACHE INTERNAL "Have include ${INCLUDE}")
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file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
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"Determining if the include file ${INCLUDE} "
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"exists passed with the following output:\n"
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"${OUTPUT}\n\n")
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else()
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if(NOT CMAKE_REQUIRED_QUIET)
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message(STATUS "Looking for C++ include ${INCLUDE} - not found")
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endif()
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set(${VARIABLE} "" CACHE INTERNAL "Have include ${INCLUDE}")
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file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
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"Determining if the include file ${INCLUDE} "
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"exists failed with the following output:\n"
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"${OUTPUT}\n\n")
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endif()
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endif()
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endmacro()
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