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

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+# - Check if the given C source code compiles and runs.
+# CHECK_C_SOURCE_RUNS(<code> <var>)
+#  <code>   - source code to try to compile
+#  <var>    - variable to store the result
+#             (1 for success, empty for failure)
+# 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
+#  CMAKE_REQUIRED_LIBRARIES = list of libraries to link
+
+#=============================================================================
+# Copyright 2006-2009 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_C_SOURCE_RUNS SOURCE VAR)
+  IF("${VAR}" MATCHES "^${VAR}$")
+    SET(MACRO_CHECK_FUNCTION_DEFINITIONS 
+      "-D${VAR} ${CMAKE_REQUIRED_FLAGS}")
+    IF(CMAKE_REQUIRED_LIBRARIES)
+      SET(CHECK_C_SOURCE_COMPILES_ADD_LIBRARIES
+        "-DLINK_LIBRARIES:STRING=${CMAKE_REQUIRED_LIBRARIES}")
+    ELSE(CMAKE_REQUIRED_LIBRARIES)
+      SET(CHECK_C_SOURCE_COMPILES_ADD_LIBRARIES)
+    ENDIF(CMAKE_REQUIRED_LIBRARIES)
+    IF(CMAKE_REQUIRED_INCLUDES)
+      SET(CHECK_C_SOURCE_COMPILES_ADD_INCLUDES
+        "-DINCLUDE_DIRECTORIES:STRING=${CMAKE_REQUIRED_INCLUDES}")
+    ELSE(CMAKE_REQUIRED_INCLUDES)
+      SET(CHECK_C_SOURCE_COMPILES_ADD_INCLUDES)
+    ENDIF(CMAKE_REQUIRED_INCLUDES)
+    FILE(WRITE "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/src.c"
+      "${SOURCE}\n")
+
+    MESSAGE(STATUS "Performing Test ${VAR}")
+    TRY_RUN(${VAR}_EXITCODE ${VAR}_COMPILED
+      ${CMAKE_BINARY_DIR}
+      ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/src.c
+      COMPILE_DEFINITIONS ${CMAKE_REQUIRED_DEFINITIONS}
+      CMAKE_FLAGS -DCOMPILE_DEFINITIONS:STRING=${MACRO_CHECK_FUNCTION_DEFINITIONS}
+      -DCMAKE_SKIP_RPATH:BOOL=${CMAKE_SKIP_RPATH}
+      "${CHECK_C_SOURCE_COMPILES_ADD_LIBRARIES}"
+      "${CHECK_C_SOURCE_COMPILES_ADD_INCLUDES}"
+      COMPILE_OUTPUT_VARIABLE OUTPUT)
+    # if it did not compile make the return value fail code of 1
+    IF(NOT ${VAR}_COMPILED)
+      SET(${VAR}_EXITCODE 1)
+    ENDIF(NOT ${VAR}_COMPILED)
+    # if the return value was 0 then it worked
+    IF("${${VAR}_EXITCODE}" EQUAL 0)
+      SET(${VAR} 1 CACHE INTERNAL "Test ${VAR}")
+      MESSAGE(STATUS "Performing Test ${VAR} - Success")
+      FILE(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log 
+        "Performing C SOURCE FILE Test ${VAR} succeded with the following output:\n"
+        "${OUTPUT}\n"
+        "Return value: ${${VAR}}\n"
+        "Source file was:\n${SOURCE}\n")
+    ELSE("${${VAR}_EXITCODE}" EQUAL 0)
+      IF(CMAKE_CROSSCOMPILING AND "${${VAR}_EXITCODE}" MATCHES  "FAILED_TO_RUN")
+        SET(${VAR} "${${VAR}_EXITCODE}")
+      ELSE(CMAKE_CROSSCOMPILING AND "${${VAR}_EXITCODE}" MATCHES  "FAILED_TO_RUN")
+        SET(${VAR} "" CACHE INTERNAL "Test ${VAR}")
+      ENDIF(CMAKE_CROSSCOMPILING AND "${${VAR}_EXITCODE}" MATCHES  "FAILED_TO_RUN")
+
+      MESSAGE(STATUS "Performing Test ${VAR} - Failed")
+      FILE(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log 
+        "Performing C SOURCE FILE Test ${VAR} failed with the following output:\n"
+        "${OUTPUT}\n"
+        "Return value: ${${VAR}_EXITCODE}\n"
+        "Source file was:\n${SOURCE}\n")
+
+    ENDIF("${${VAR}_EXITCODE}" EQUAL 0)
+  ENDIF("${VAR}" MATCHES "^${VAR}$")
+ENDMACRO(CHECK_C_SOURCE_RUNS)
+