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include(ExternalProject)
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if(CMAKE_GENERATOR STREQUAL "Borland Makefiles" OR
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CMAKE_GENERATOR STREQUAL "Watcom WMake")
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set(fs_delay 3)
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else()
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set(fs_delay 1.125)
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endif()
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# Given this setup, on the first build, both configure steps and both build
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# steps will run. On a noop rebuild, only the build steps will run. Without
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# CONFIGURE_HANDLED_BY_BUILD, the configure step of proj2 would also run on a
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# noop rebuild.
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ExternalProject_Add(proj1
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DOWNLOAD_COMMAND ""
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SOURCE_DIR ""
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CONFIGURE_COMMAND ${CMAKE_COMMAND} -E echo "Doing something"
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# file(TIMESTAMP) gives back the timestamp in seconds so we sleep a second to
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# make sure we get a different timestamp on the stamp file
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BUILD_COMMAND ${CMAKE_COMMAND} -E sleep ${fs_delay}
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INSTALL_COMMAND ""
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BUILD_ALWAYS ON
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STAMP_DIR "stamp"
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)
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ExternalProject_Add(proj2
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DOWNLOAD_COMMAND ""
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SOURCE_DIR ""
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CONFIGURE_COMMAND ${CMAKE_COMMAND} -E echo "Doing something"
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BUILD_COMMAND ${CMAKE_COMMAND} -E sleep ${fs_delay}
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INSTALL_COMMAND ""
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CONFIGURE_HANDLED_BY_BUILD ON
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DEPENDS proj1
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STAMP_DIR "stamp"
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)
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