Missing zlib dependency

[pneerincx]

Adding "Requires: zlib" to libpng.pc.in like in the patch below solved compilation issues...

diff -ru libpng-1.6.29.original/libpng.pc.in libpng-1.6.29.patched/libpng.pc.in
--- libpng-1.6.29.original/libpng.pc.in 2017-03-16 13:21:02.000000000 +0100
+++ libpng-1.6.29.patched/libpng.pc.in 2017-06-29 11:04:17.000000000 +0200
@@ -6,6 +6,7 @@
Name: libpng
Description: Loads and saves PNG files
Version: @PNGLIB_VERSION@
+Requires: zlib
Libs: -L${libdir} -lpng@PNGLIB_MAJOR@@PNGLIB_MINOR@
Libs.private: @libs@
Cflags: -I${includedir}

[glennrp]

Thanks. I pushed your change to the libpng16 branch: commit 89b8c13
It will appear in the next beta release which will be libpng-1.6.31beta01.

[pneerincx]

Thanks; looking forward to 1.6.31!