fatal error: png.h: No such file or directory(MiddleBury Evaluation)
png.h is part of libpng16-devel and the specific include
directory must be added to the include path of your project.
$ cygcheck -l libpng16-devel |grep png.h
/usr/include/libpng16/png.h
png.h header file missing in zint barcode library:
What platform are you developing on? It sounds like you need to install the PNG development libraries. For example, if you are on Ubuntu, 'apt-get install libpng-dev'.
/usr/bin/sudo: Permission denied in cygwin when installing libpng-dev
To install package on cygwin you need to use its setup as downloaded by
https://cygwin.com
see
https://cygwin.com/cygwin-ug-net/setup-net.html#setup-packages
for how to select packages.
yum will not work and please note that Cygwin is not Linux. Most things works in the same way but not all.
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