ardupilot/cmake/modules/MacroEnsureOutOfSourceBuild...

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# - MACRO_ENSURE_OUT_OF_SOURCE_BUILD(<errorMessage>)
# MACRO_ENSURE_OUT_OF_SOURCE_BUILD(<errorMessage>)
# Copyright (c) 2006, Alexander Neundorf, <neundorf@kde.org>
#
# Redistribution and use is allowed according to the terms of the BSD license.
# For details see the accompanying COPYING-CMAKE-SCRIPTS file.
macro (MACRO_ENSURE_OUT_OF_SOURCE_BUILD _errorMessage)
string(COMPARE EQUAL "${CMAKE_SOURCE_DIR}" "${CMAKE_BINARY_DIR}" _insource)
if (_insource)
file(REMOVE [CMakeCache.txt CMakeFiles])
message(FATAL_ERROR "${_errorMessage}")
endif (_insource)
endmacro (MACRO_ENSURE_OUT_OF_SOURCE_BUILD)
# vim:ts=4:sw=4:expandtab