File: MacroEnsureOutOfSourceBuild.cmake

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# MACRO_ENSURE_OUT_OF_SOURCE_BUILD(<errorMessage>)

macro( MACRO_ENSURE_OUT_OF_SOURCE_BUILD _errorMessage )

string( COMPARE EQUAL "${CMAKE_SOURCE_DIR}" "${CMAKE_BINARY_DIR}" _insource )
if( _insource )
 message( SEND_ERROR "${_errorMessage}" )
 message( FATAL_ERROR
 "In-source builds are not allowed.
 CMake would overwrite the makefiles distributed with Compiler-RT.
 Please create a directory and run cmake from there, passing the path
 to this source directory as the last argument.
 This process created the file `CMakeCache.txt' and the directory `CMakeFiles'.
 Please delete them."
 )
endif( _insource )

endmacro( MACRO_ENSURE_OUT_OF_SOURCE_BUILD )