depends tcl &&
depends tkimg &&
optional_depends zlib  --with{,out}-zlib \
		 "for zlib (de)compression support" &&
optional_depends bzip2 --with{,out}-bzip2 \
		 "for bzip2 (de)compression support" &&
optional_depends SSL   --with{,out}-ssl \
		 "for cryptographic support"

.