mirror of
https://github.com/reactos/CMake.git
synced 2024-11-30 23:10:26 +00:00
f051814ed0
Run the convert-help.bash script to convert documentation: ./convert-help.bash "/path/to/CMake-build/bin" Then remove it.
79 lines
2.6 KiB
CMake
79 lines
2.6 KiB
CMake
#.rst:
|
|
# CheckVariableExists
|
|
# -------------------
|
|
#
|
|
# Check if the variable exists.
|
|
#
|
|
# ::
|
|
#
|
|
# CHECK_VARIABLE_EXISTS(VAR VARIABLE)
|
|
#
|
|
#
|
|
#
|
|
# ::
|
|
#
|
|
# VAR - the name of the variable
|
|
# VARIABLE - variable to store the result
|
|
#
|
|
#
|
|
#
|
|
# 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
|
|
|
|
#=============================================================================
|
|
# 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("${VARIABLE}" MATCHES "^${VARIABLE}$")
|
|
set(MACRO_CHECK_VARIABLE_DEFINITIONS
|
|
"-DCHECK_VARIABLE_EXISTS=${VAR} ${CMAKE_REQUIRED_FLAGS}")
|
|
message(STATUS "Looking for ${VAR}")
|
|
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}")
|
|
message(STATUS "Looking for ${VAR} - found")
|
|
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}")
|
|
message(STATUS "Looking for ${VAR} - not found")
|
|
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()
|