1Any Android specific modifications to upstream libpng (1.6.22beta) should
2be listed here:
3
4(1) Android has added the following files.
5    pngusr.h
6    Android.mk
7    CleanSpec.mk
8    MODULE_LICENSE_BSD_LIKE
9    README.version
10
11(2) pnglibconf.h
12    This is copied from scripts/pnglibconf.h.prebuilt.
13    Android has undefined PNG_WARNINGS_SUPPORTED.
14
15(3) Removed contrib/testpngs/
16    There is no reason to check in all of these files if we won't
17    be using them.
18