diff options
Diffstat (limited to 'Modules/CheckCXXSourceCompiles.cmake')
| -rw-r--r-- | Modules/CheckCXXSourceCompiles.cmake | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/Modules/CheckCXXSourceCompiles.cmake b/Modules/CheckCXXSourceCompiles.cmake new file mode 100644 index 000000000..7f7336e5b --- /dev/null +++ b/Modules/CheckCXXSourceCompiles.cmake @@ -0,0 +1,96 @@ +# - 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) + |