Yes, that's the problem, I am not supposed to update prerequisite file inside of prerequisite dir.
But it's not related to WinXP or Win7, because it also worked _incorrectly_ on other Win7. So what is happening that in some cases the mtime of directory is exactly the mtime of the file created. This is confusing. @DaveK: I'll check the article for sure, thanks! Dave Korn-6 wrote: > > On 05/05/2010 06:04, Jeremy Bopp wrote: >> MichaelKim wrote: > >>> Prerequisite `../bin/build/chrome' is newer than >>> target `../bin/build/chrome/alt.jar'. >>> Must remake target `../bin/build/chrome/alt.jar'. > >> So let me get this straight. The JAR file you're trying to build is >> within a directory which is listed as a prerequisite of that JAR file? >> Unless I'm completely off base, it would seem to be that this is >> expected behavior then. If you mess with the contents of a directory, >> such as by adding a file to it, the last modified timestamp of the >> directory is going to be updated. I would expect that to happen after >> the file is added to the directory which could very well be *after* the >> last modified timestamp of the file is set. Thus the directory will >> appear newer than the file. > > Yep: > >> $(chrome_jar_file): $(jar_sources) $(jar_target_dir) > > The idea is supposed to be to make the jar file depend on the output > dir, so > that if the output dir doesn't exist, the $(jar_target_dir) rule will get > invoked to mkdir it; but it doesn't anticipate that the timestamp of an > existing dir changes everytime you touch the files within it. > > For a discussion of better ways to create an output dir in make, see: > > http://www.cmcrossroads.com/cm-articles/columns/ask-mr-make > > The particular article you're looking for is #26, "Making directories in > GNU > Make": > > http://www.cmcrossroads.com/ask-mr-make/6936-making-directories-in-gnu-make > > I don't know why this would be working on the old XP machine, unless > it's > running an older version of cygwin that had a bug or didn't implement > updating > directory timestamps. > > cheers, > DaveK > > > -- > Problem reports: http://cygwin.com/problems.html > FAQ: http://cygwin.com/faq/ > Documentation: http://cygwin.com/docs.html > Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple > > > -- View this message in context: http://old.nabble.com/Cygwin-make-target-is-never-determined-up-to-date-tp28454344p28467628.html Sent from the Cygwin list mailing list archive at Nabble.com. -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple