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1# MACRO_ENSURE_OUT_OF_SOURCE_BUILD(<errorMessage>)2 3macro( MACRO_ENSURE_OUT_OF_SOURCE_BUILD _errorMessage )4 5string( COMPARE EQUAL "${CMAKE_SOURCE_DIR}" "${CMAKE_BINARY_DIR}" _insource )6if( _insource )7 message( SEND_ERROR "${_errorMessage}" )8 message( FATAL_ERROR9 "In-source builds are not allowed.10 CMake would overwrite the makefiles distributed with libcxxabi.11 Please create a directory and run cmake from there, passing the path12 to this source directory as the last argument.13 This process created the file `CMakeCache.txt' and the directory `CMakeFiles'.14 Please delete them."15 )16endif( _insource )17 18endmacro( MACRO_ENSURE_OUT_OF_SOURCE_BUILD )19