1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/cmake/CheckSharedFunctionExists.cmake	Tue Oct 25 13:02:31 2011 -0700
     1.3 @@ -0,0 +1,92 @@
     1.4 +# - Check if a symbol exists as a function, variable, or macro
     1.5 +# CHECK_SYMBOL_EXISTS(<symbol> <files> <variable>)
     1.6 +#
     1.7 +# Check that the <symbol> is available after including given header
     1.8 +# <files> and store the result in a <variable>.  Specify the list
     1.9 +# of files in one argument as a semicolon-separated list.
    1.10 +#
    1.11 +# If the header files define the symbol as a macro it is considered
    1.12 +# available and assumed to work.  If the header files declare the
    1.13 +# symbol as a function or variable then the symbol must also be
    1.14 +# available for linking.  If the symbol is a type or enum value
    1.15 +# it will not be recognized (consider using CheckTypeSize or
    1.16 +# CheckCSourceCompiles).
    1.17 +#
    1.18 +# The following variables may be set before calling this macro to
    1.19 +# modify the way the check is run:
    1.20 +#
    1.21 +#  CMAKE_REQUIRED_FLAGS = string of compile command line flags
    1.22 +#  CMAKE_REQUIRED_DEFINITIONS = list of macros to define (-DFOO=bar)
    1.23 +#  CMAKE_REQUIRED_INCLUDES = list of include directories
    1.24 +#  CMAKE_REQUIRED_LIBRARIES = list of libraries to link
    1.25 +
    1.26 +#=============================================================================
    1.27 +# Copyright 2003-2011 Kitware, Inc.
    1.28 +#
    1.29 +# Distributed under the OSI-approved BSD License (the "License");
    1.30 +# see accompanying file Copyright.txt for details.
    1.31 +#
    1.32 +# This software is distributed WITHOUT ANY WARRANTY; without even the
    1.33 +# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
    1.34 +# See the License for more information.
    1.35 +#=============================================================================
    1.36 +# (To distribute this file outside of CMake, substitute the full
    1.37 +#  License text for the above reference.)
    1.38 +
    1.39 +MACRO(CHECK_SHARED_FUNCTION_EXISTS SYMBOL FILES LIBRARY LOCATION VARIABLE)
    1.40 +  IF("${VARIABLE}" MATCHES "^${VARIABLE}$")
    1.41 +    SET(CMAKE_CONFIGURABLE_FILE_CONTENT "/* */\n")
    1.42 +    SET(MACRO_CHECK_SYMBOL_EXISTS_FLAGS ${CMAKE_REQUIRED_FLAGS})
    1.43 +    IF(CMAKE_REQUIRED_LIBRARIES)
    1.44 +      SET(CHECK_SYMBOL_EXISTS_LIBS 
    1.45 +        "-DLINK_LIBRARIES:STRING=${CMAKE_REQUIRED_LIBRARIES};${LIBRARY}")
    1.46 +    ELSE(CMAKE_REQUIRED_LIBRARIES)
    1.47 +      SET(CHECK_SYMBOL_EXISTS_LIBS
    1.48 +        "-DLINK_LIBRARIES:STRING=${LIBRARY}")
    1.49 +    ENDIF(CMAKE_REQUIRED_LIBRARIES)
    1.50 +    IF(CMAKE_REQUIRED_INCLUDES)
    1.51 +      SET(CMAKE_SYMBOL_EXISTS_INCLUDES
    1.52 +        "-DINCLUDE_DIRECTORIES:STRING=${CMAKE_REQUIRED_INCLUDES}")
    1.53 +    ELSE(CMAKE_REQUIRED_INCLUDES)
    1.54 +      SET(CMAKE_SYMBOL_EXISTS_INCLUDES)
    1.55 +    ENDIF(CMAKE_REQUIRED_INCLUDES)
    1.56 +    FOREACH(FILE ${FILES})
    1.57 +      SET(CMAKE_CONFIGURABLE_FILE_CONTENT
    1.58 +        "${CMAKE_CONFIGURABLE_FILE_CONTENT}#include <${FILE}>\n")
    1.59 +    ENDFOREACH(FILE)
    1.60 +    SET(CMAKE_CONFIGURABLE_FILE_CONTENT
    1.61 +      "${CMAKE_CONFIGURABLE_FILE_CONTENT}\nvoid cmakeRequireSymbol(int dummy,...){(void)dummy;}\nint main()\n{\n  cmakeRequireSymbol(0,&${SYMBOL});\n  return 0;\n}\n")
    1.62 +
    1.63 +    CONFIGURE_FILE("${CMAKE_ROOT}/Modules/CMakeConfigurableFile.in"
    1.64 +      "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/CheckSymbolExists.c" @ONLY)
    1.65 +
    1.66 +    MESSAGE(STATUS "Looking for ${SYMBOL} in ${LIBRARY}")
    1.67 +    TRY_COMPILE(${VARIABLE}
    1.68 +      ${CMAKE_BINARY_DIR}
    1.69 +      ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/CheckSymbolExists.c
    1.70 +      COMPILE_DEFINITIONS ${CMAKE_REQUIRED_DEFINITIONS}
    1.71 +      CMAKE_FLAGS 
    1.72 +      -DCOMPILE_DEFINITIONS:STRING=${MACRO_CHECK_SYMBOL_EXISTS_FLAGS}
    1.73 +      -DLINK_DIRECTORIES:STRING=${LOCATION}
    1.74 +      "${CHECK_SYMBOL_EXISTS_LIBS}"
    1.75 +      "${CMAKE_SYMBOL_EXISTS_INCLUDES}"
    1.76 +      OUTPUT_VARIABLE OUTPUT)
    1.77 +    IF(${VARIABLE})
    1.78 +      MESSAGE(STATUS "Looking for ${SYMBOL} in ${LIBRARY} - found")
    1.79 +      SET(${VARIABLE} 1 CACHE INTERNAL "Have symbol ${SYMBOL} in ${LIBRARY}")
    1.80 +      FILE(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log 
    1.81 +        "Determining if the ${SYMBOL} "
    1.82 +        "exist in ${LIBRARY} passed with the following output:\n"
    1.83 +        "${OUTPUT}\nFile ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/CheckSymbolExists.c:\n"
    1.84 +        "${CMAKE_CONFIGURABLE_FILE_CONTENT}\n")
    1.85 +    ELSE(${VARIABLE})
    1.86 +      MESSAGE(STATUS "Looking for ${SYMBOL} in ${LIBRARY} - not found.")
    1.87 +      SET(${VARIABLE} "" CACHE INTERNAL "Have symbol ${SYMBOL} in ${LIBRARY}")
    1.88 +      FILE(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log 
    1.89 +        "Determining if the ${SYMBOL} "
    1.90 +        "exist in ${LIBRARY} failed with the following output:\n"
    1.91 +        "${OUTPUT}\nFile ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/CheckSymbolExists.c:\n"
    1.92 +        "${CMAKE_CONFIGURABLE_FILE_CONTENT}\n")
    1.93 +    ENDIF(${VARIABLE})
    1.94 +  ENDIF("${VARIABLE}" MATCHES "^${VARIABLE}$")
    1.95 +ENDMACRO(CHECK_SHARED_FUNCTION_EXISTS)