45 lines
1.5 KiB
CMake
45 lines
1.5 KiB
CMake
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# - Issue an error if the source tree is in or equal to the build tree
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#
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# include(RequireOutOfSourceBuild)
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#
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#
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# Original Author:
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# 2009-2010 Ryan Pavlik <rpavlik@iastate.edu> <abiryan@ryand.net>
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# http://academic.cleardefinition.com
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# Iowa State University HCI Graduate Program/VRAC
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#
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# Copyright Iowa State University 2009-2010.
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# Distributed under the Boost Software License, Version 1.0.
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# (See accompanying file ../LICENSE_1_0.txt or copy at
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# http://www.boost.org/LICENSE_1_0.txt)
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get_filename_component(_src "${CMAKE_SOURCE_DIR}" ABSOLUTE)
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get_filename_component(_cur_src "${CMAKE_CURRENT_SOURCE_DIR}" ABSOLUTE)
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get_filename_component(_bin "${CMAKE_BINARY_DIR}" ABSOLUTE)
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string(LENGTH "${_src}" _src_len)
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string(LENGTH "${_cur_src}" _cur_src_len)
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string(LENGTH "${_bin}" _bin_len)
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set(_test)
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if(NOT "${_bin_len}" GREATER "${_src_len}")
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list(APPEND _test _src)
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#message(STATUS "Checking ${_src}")
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endif()
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if(NOT "${_bin_len}" GREATER "${_cur_src_len}")
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list(APPEND _test _cur_src)
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#message(STATUS "Checking ${_cur_src}")
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endif()
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foreach(_var ${_test})
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string(SUBSTRING "${${_var}}" 0 ${_bin_len} _chopped)
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#message(STATUS "comparing ${_bin} and ${_chopped}")
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if("${_bin}" STREQUAL "${_chopped}")
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get_filename_component(_parent "${CMAKE_SOURCE_DIR}/.." ABSOLUTE)
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message(FATAL_ERROR
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"You must set a binary directory that is different from your source directory. You might consider ${CMAKE_SOURCE_DIR}/build or ${_parent}/build-${CMAKE_PROJECT_NAME}")
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endif()
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endforeach()
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