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+ Building libpng-1.6.37 as part of the TL tree
+ =============================================
+
+This directory libs/libpng/ uses a proxy Makefile.am to build the libpng library
+from the unmodified (*) source tree in libs/libpng/libpng-src/, bypassing
+the original build system.
+
+(*) The directory TLpatches contains patches (if any) applied to
+the original source tree.
+
+As far as applicable, the tests in libs/libpng-src/configure.ac have been
+copied to libs/libpng/configure.ac.
+
+=============================
+
+2009-07-23 Peter Breitenlohner <peb@mppmu.mpg.de>
+2019-05-03 Akira Kakuto <kakuto@fuk.kindai.ac.jp>