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-rw-r--r--Modules/CheckCXXSourceCompiles.cmake96
1 files changed, 96 insertions, 0 deletions
diff --git a/Modules/CheckCXXSourceCompiles.cmake b/Modules/CheckCXXSourceCompiles.cmake
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+++ b/Modules/CheckCXXSourceCompiles.cmake
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+# - Check if given C++ source compiles and links into an executable
+# CHECK_CXX_SOURCE_COMPILES(<code> <var> [FAIL_REGEX <fail-regex>])
+# <code> - source code to try to compile, must define 'main'
+# <var> - variable to store whether the source code compiled
+# <fail-regex> - fail if test output matches this regex
+# 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 2005-2009 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.)
+
+INCLUDE("${CMAKE_CURRENT_LIST_DIR}/CMakeExpandImportedTargets.cmake")
+
+
+MACRO(CHECK_CXX_SOURCE_COMPILES SOURCE VAR)
+ IF("${VAR}" MATCHES "^${VAR}$")
+ SET(_FAIL_REGEX)
+ SET(_key)
+ FOREACH(arg ${ARGN})
+ IF("${arg}" MATCHES "^(FAIL_REGEX)$")
+ SET(_key "${arg}")
+ ELSEIF(_key)
+ LIST(APPEND _${_key} "${arg}")
+ ELSE()
+ MESSAGE(FATAL_ERROR "Unknown argument:\n ${arg}\n")
+ ENDIF()
+ ENDFOREACH()
+
+ SET(MACRO_CHECK_FUNCTION_DEFINITIONS
+ "-D${VAR} ${CMAKE_REQUIRED_FLAGS}")
+ IF(CMAKE_REQUIRED_LIBRARIES)
+ # this one translates potentially used imported library targets to their files on disk
+ CMAKE_EXPAND_IMPORTED_TARGETS(_ADJUSTED_CMAKE_REQUIRED_LIBRARIES LIBRARIES ${CMAKE_REQUIRED_LIBRARIES} CONFIGURATION "${CMAKE_TRY_COMPILE_CONFIGURATION}")
+ SET(CHECK_CXX_SOURCE_COMPILES_ADD_LIBRARIES
+ "-DLINK_LIBRARIES:STRING=${_ADJUSTED_CMAKE_REQUIRED_LIBRARIES}")
+ ELSE(CMAKE_REQUIRED_LIBRARIES)
+ SET(CHECK_CXX_SOURCE_COMPILES_ADD_LIBRARIES)
+ ENDIF(CMAKE_REQUIRED_LIBRARIES)
+ IF(CMAKE_REQUIRED_INCLUDES)
+ SET(CHECK_CXX_SOURCE_COMPILES_ADD_INCLUDES
+ "-DINCLUDE_DIRECTORIES:STRING=${CMAKE_REQUIRED_INCLUDES}")
+ ELSE(CMAKE_REQUIRED_INCLUDES)
+ SET(CHECK_CXX_SOURCE_COMPILES_ADD_INCLUDES)
+ ENDIF(CMAKE_REQUIRED_INCLUDES)
+ FILE(WRITE "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/src.cxx"
+ "${SOURCE}\n")
+
+ MESSAGE(STATUS "Performing Test ${VAR}")
+ TRY_COMPILE(${VAR}
+ ${CMAKE_BINARY_DIR}
+ ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/src.cxx
+ COMPILE_DEFINITIONS ${CMAKE_REQUIRED_DEFINITIONS}
+ CMAKE_FLAGS -DCOMPILE_DEFINITIONS:STRING=${MACRO_CHECK_FUNCTION_DEFINITIONS}
+ "${CHECK_CXX_SOURCE_COMPILES_ADD_LIBRARIES}"
+ "${CHECK_CXX_SOURCE_COMPILES_ADD_INCLUDES}"
+ OUTPUT_VARIABLE OUTPUT)
+
+ FOREACH(_regex ${_FAIL_REGEX})
+ IF("${OUTPUT}" MATCHES "${_regex}")
+ SET(${VAR} 0)
+ ENDIF()
+ ENDFOREACH()
+
+ IF(${VAR})
+ SET(${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"
+ "Source file was:\n${SOURCE}\n")
+ ELSE(${VAR})
+ MESSAGE(STATUS "Performing Test ${VAR} - Failed")
+ SET(${VAR} "" CACHE INTERNAL "Test ${VAR}")
+ FILE(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
+ "Performing C++ SOURCE FILE Test ${VAR} failed with the following output:\n"
+ "${OUTPUT}\n"
+ "Source file was:\n${SOURCE}\n")
+ ENDIF(${VAR})
+ ENDIF("${VAR}" MATCHES "^${VAR}$")
+ENDMACRO(CHECK_CXX_SOURCE_COMPILES)
+