OK, wait, you left something out.... Here is my original post:
# only run if parser.e is newer than source.cmake
if(parser.e IS_NEWER_THAN source.cmake)
execute_process(COMMAND myparser parser.e --sources sources.cmake)
endif()
# include source.cmake, this file should set some vars
# something like set(SOURCES a.c b.c d.c)
include(sources.cmake)
******** This is what you left out **********
******** We have to make sure cmake re-runs when
******** input files to this change, the only way
******** to do that is to use them as an input to cmake
# now make parser.e an input to cmake, so that cmake will
# re-run when make is run and parser.e changes
configure_file(parser.e parser.e.flagfile)
add_custom_command( # add the custom command to run the full parser here)
-Bill
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