Signed-off-by: Jan Pavlinec <jan.pavlinec@nic.cz>

This is needed for compilation. A Java compiler is also needed but that
must be handled elsewhere.

Fixed up license information.

URLs to HTTPS.

Other Makefile cleanups.

Signed-off-by: Rosen Penev <rosenp@gmail.com>

classpath builds with -Wextra and, unless configured with
--disable-werror, -Werror.  Since GCC 7 added -Wimplicit-fallthrough=3
to -Wextra we need to make it not an error for code that doesn't use
__attribute__((fallthrough)) yet.

Signed-off-by: Daniel Santos <daniel.santos@pobox.com>

gnu_java_math_GMP.c:1135:13: error: this statement may fall through [-Werror=implicit-fallthrough=]
         res = mpz_popcount (_this);
         ~~~~^~~~~~~~~~~~~~~~~~~~~~
gnu_java_math_GMP.c:1136:7: note: here
       default:
       ^~~~~~~

Signed-off-by: Guo Li <uxgood.org@gmail.com>

fix Makefile chmod (644)
replace MD5SUM with HASH
add PKG_MIRROR_HASH when PKG_SOURCE_PROTO:=git

(PKG_SOURCE_PROTO:=svn tarballs are not reproducible for now)

Signed-off-by: Etienne Champetier <champetier.etienne@gmail.com>

Signed-off-by: Nicolas Thill <nico@openwrt.org>

Signed-off-by: Dana H. Myers <k6jq@comcast.net>