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6502-cpp/cmake/PreventInSourceBuilds.cmake

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CMake

#
# This function will prevent in-source builds
function(AssureOutOfSourceBuilds)
# make sure the user doesn't play dirty with symlinks
get_filename_component(srcdir "${CMAKE_SOURCE_DIR}" REALPATH)
get_filename_component(bindir "${CMAKE_BINARY_DIR}" REALPATH)
# disallow in-source builds
if("${srcdir}" STREQUAL "${bindir}")
message("######################################################")
message("Warning: in-source builds are disabled")
message("Please create a separate build directory and run cmake from there")
message("######################################################")
message(FATAL_ERROR "Quitting configuration")
endif()
endfunction()
assureoutofsourcebuilds()