This should fix building when a builder png.h is not available.
@ -31,6 +31,7 @@ ac_cv_func_res_nsearch=no
--with-libxml-dir=$TERMUX_PREFIX
--with-openssl=$TERMUX_PREFIX
--with-pcre-regex=$TERMUX_PREFIX
--with-png-dir=$TERMUX_PREFIX
--with-readline=$TERMUX_PREFIX
--with-zlib
--with-pgsql=shared,$TERMUX_PREFIX