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# - Prevent in-source builds.
function(prevent_in_source_builds)
# 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(FATAL_ERROR "\
CMake must not to be run in the source directory. \
Rather create a dedicated build directory and run CMake there. \
To clean up after this aborted in-place compilation:
rm -r CMakeCache.txt CMakeFiles
")
endif()
endfunction()
prevent_in_source_builds()
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