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extern/cmake/2.85/share/cmake-2.8/Modules/CheckIncludeFileCXX.cmake

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+# - Check if the include file exists.
+#  CHECK_INCLUDE_FILE_CXX(INCLUDE VARIABLE)
+#
+#  INCLUDE  - name of include file
+#  VARIABLE - variable to return result
+#  
+# An optional third argument is the CFlags to add to the compile line 
+# or you can use CMAKE_REQUIRED_FLAGS.
+#
+# The following variables may be set before calling this macro to
+# modify the way the check is run:
+#
+#  CMAKE_REQUIRED_FLAGS = string of compile command line flags
+#  CMAKE_REQUIRED_DEFINITIONS = list of macros to define (-DFOO=bar)
+#  CMAKE_REQUIRED_INCLUDES = list of include directories
+#
+
+#=============================================================================
+# Copyright 2002-2009 Kitware, Inc.
+#
+# Distributed under the OSI-approved BSD License (the "License");
+# see accompanying file Copyright.txt for details.
+#
+# This software is distributed WITHOUT ANY WARRANTY; without even the
+# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the License for more information.
+#=============================================================================
+# (To distribute this file outside of CMake, substitute the full
+#  License text for the above reference.)
+
+MACRO(CHECK_INCLUDE_FILE_CXX INCLUDE VARIABLE)
+  IF("${VARIABLE}" MATCHES "^${VARIABLE}$")
+    IF(CMAKE_REQUIRED_INCLUDES)
+      SET(CHECK_INCLUDE_FILE_CXX_INCLUDE_DIRS "-DINCLUDE_DIRECTORIES=${CMAKE_REQUIRED_INCLUDES}")
+    ELSE(CMAKE_REQUIRED_INCLUDES)
+      SET(CHECK_INCLUDE_FILE_CXX_INCLUDE_DIRS)
+    ENDIF(CMAKE_REQUIRED_INCLUDES)
+    SET(MACRO_CHECK_INCLUDE_FILE_FLAGS ${CMAKE_REQUIRED_FLAGS})
+    SET(CHECK_INCLUDE_FILE_VAR ${INCLUDE})
+    CONFIGURE_FILE(${CMAKE_ROOT}/Modules/CheckIncludeFile.cxx.in
+      ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/CheckIncludeFile.cxx IMMEDIATE)
+    MESSAGE(STATUS "Looking for C++ include ${INCLUDE}")
+    IF(${ARGC} EQUAL 3)
+      SET(CMAKE_CXX_FLAGS_SAVE ${CMAKE_CXX_FLAGS})
+      SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${ARGV2}")
+    ENDIF(${ARGC} EQUAL 3)
+
+    TRY_COMPILE(${VARIABLE}
+      ${CMAKE_BINARY_DIR}
+      ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/CheckIncludeFile.cxx
+      COMPILE_DEFINITIONS ${CMAKE_REQUIRED_DEFINITIONS}
+      CMAKE_FLAGS 
+      -DCOMPILE_DEFINITIONS:STRING=${MACRO_CHECK_INCLUDE_FILE_FLAGS}
+      "${CHECK_INCLUDE_FILE_CXX_INCLUDE_DIRS}"
+      OUTPUT_VARIABLE OUTPUT) 
+
+    IF(${ARGC} EQUAL 3)
+      SET(CMAKE_CXX_FLAGS ${CMAKE_CXX_FLAGS_SAVE})
+    ENDIF(${ARGC} EQUAL 3)
+
+    IF(${VARIABLE})
+      MESSAGE(STATUS "Looking for C++ include ${INCLUDE} - found")
+      SET(${VARIABLE} 1 CACHE INTERNAL "Have include ${INCLUDE}")
+      FILE(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log 
+        "Determining if the include file ${INCLUDE} "
+        "exists passed with the following output:\n"
+        "${OUTPUT}\n\n")
+    ELSE(${VARIABLE})
+      MESSAGE(STATUS "Looking for C++ include ${INCLUDE} - not found")
+      SET(${VARIABLE} "" CACHE INTERNAL "Have include ${INCLUDE}")
+      FILE(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log 
+        "Determining if the include file ${INCLUDE} "
+        "exists failed with the following output:\n"
+        "${OUTPUT}\n\n")
+    ENDIF(${VARIABLE})
+  ENDIF("${VARIABLE}" MATCHES "^${VARIABLE}$")
+ENDMACRO(CHECK_INCLUDE_FILE_CXX)