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Diffstat (limited to 'share/cmake-3.5/Modules/CheckVariableExists.cmake')
-rwxr-xr-x | share/cmake-3.5/Modules/CheckVariableExists.cmake | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/share/cmake-3.5/Modules/CheckVariableExists.cmake b/share/cmake-3.5/Modules/CheckVariableExists.cmake new file mode 100755 index 0000000..f3e05e4 --- /dev/null +++ b/share/cmake-3.5/Modules/CheckVariableExists.cmake @@ -0,0 +1,85 @@ +#.rst: +# CheckVariableExists +# ------------------- +# +# Check if the variable exists. +# +# :: +# +# CHECK_VARIABLE_EXISTS(VAR VARIABLE) +# +# +# +# :: +# +# VAR - the name of the variable +# VARIABLE - variable to store the result +# Will be created as an internal cache variable. +# +# +# This macro is only for C variables. +# +# 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_LIBRARIES = list of libraries to link +# CMAKE_REQUIRED_QUIET = execute quietly without messages + +#============================================================================= +# 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_VARIABLE_EXISTS VAR VARIABLE) + if(NOT DEFINED "${VARIABLE}") + set(MACRO_CHECK_VARIABLE_DEFINITIONS + "-DCHECK_VARIABLE_EXISTS=${VAR} ${CMAKE_REQUIRED_FLAGS}") + if(NOT CMAKE_REQUIRED_QUIET) + message(STATUS "Looking for ${VAR}") + endif() + if(CMAKE_REQUIRED_LIBRARIES) + set(CHECK_VARIABLE_EXISTS_ADD_LIBRARIES + LINK_LIBRARIES ${CMAKE_REQUIRED_LIBRARIES}) + else() + set(CHECK_VARIABLE_EXISTS_ADD_LIBRARIES) + endif() + try_compile(${VARIABLE} + ${CMAKE_BINARY_DIR} + ${CMAKE_ROOT}/Modules/CheckVariableExists.c + COMPILE_DEFINITIONS ${CMAKE_REQUIRED_DEFINITIONS} + ${CHECK_VARIABLE_EXISTS_ADD_LIBRARIES} + CMAKE_FLAGS -DCOMPILE_DEFINITIONS:STRING=${MACRO_CHECK_VARIABLE_DEFINITIONS} + OUTPUT_VARIABLE OUTPUT) + if(${VARIABLE}) + set(${VARIABLE} 1 CACHE INTERNAL "Have variable ${VAR}") + if(NOT CMAKE_REQUIRED_QUIET) + message(STATUS "Looking for ${VAR} - found") + endif() + file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log + "Determining if the variable ${VAR} exists passed with the following output:\n" + "${OUTPUT}\n\n") + else() + set(${VARIABLE} "" CACHE INTERNAL "Have variable ${VAR}") + if(NOT CMAKE_REQUIRED_QUIET) + message(STATUS "Looking for ${VAR} - not found") + endif() + file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log + "Determining if the variable ${VAR} exists failed with the following output:\n" + "${OUTPUT}\n\n") + endif() + endif() +endmacro() |