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# Original source of this script:
# https://raw.githubusercontent.com/InsightSoftwareConsortium/ITK/master/CMake/PreventInSourceBuilds.cmake
#
# Thanks to the ITK project!
#
# 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("# igraph should not be configured & built in the igraph source directory")
message("# You must run cmake in a build directory.")
message("#")
message("# Example:")
message("# mkdir build; cd build; cmake ..; make")
message("#")
message("# NOTE: Given that you already tried to make an in-source build")
message("# CMake have already created several files & directories")
message("# in your source tree. If you are using git, run 'git clean -dfx'")
message("# to start from scratch. If you don't have git, remove")
message("# CMakeCache.txt and the CMakeFiles/ folder from the top of")
message("# the source tree.")
message("#")
message("##########################################################################")
message("")
message(FATAL_ERROR "Quitting configuration")
endif()
endfunction()
AssureOutOfSourceBuilds()
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