pnglibconf.h generated with these lines:
PATH=$DEVKITPPC/bin:$PATH
CPPFLAGS=-I$DEVKITPRO/portlibs/ppc/include LDFLAGS=-L$DEVKITPRO/portlibs/ppc/lib ./configure --prefix=$DEVKITPRO/portlibs/ppc --host=powerpc-eabi --disable-shared --enable-static
make
Files that start with an underscore are missing in GitHub pages (doxygen documentation).
The work around for this behavior is to include a .nojekyll file in the root path to turn off Jekyll.
If we add a .nojekyll file, the source files will be published without any modifications.