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# This function will prevent in-source builds
# Based on https://github.com/InsightSoftwareConsortium/ITK/blob/1b5da45dc706e6d6803b52740fa50e0e5e7705e9/CMake/PreventInSourceBuilds.cmake
function(PreventInSourceBuilds)
# 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
"Allegro must not be configured to build in the source directory.\n"
"Please refer to README.md\n"
"Quitting configuration step")
endif()
endfunction()
PreventInSourceBuilds()
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