Using this test case, I see a different behavior on Windows and Linux ; I'm
creating two files, then generating a ZIP file (with regexpmapper to rename
files), wait a few seconds (just in case there's FS timestamp problem) and
re-execute the same Zip task.
On Linux, the second Zip task doesn't do anything (as expected) as the
files are not modified.
On Windows, the Zip file is always updated. With -v, I'm getting :
[zip] us/xx/xxtest.r added as us/xx/xxtest.r is outdated.
[zip] us/zz/zztest.r added as us/zz/zztest.r is outdated.
Using Ant 1.9.7, JDK 1.8 on both systems.