rng-tools: bump to version 5

Add semi-automatic libgcrypt dependency for i386/x86_64 to use RDRAND.
This is exclusively used by rngd for which we don't yet ship an
initscript/service file. Even so the user can choose to disable it at
invocation time via the --no-drng option (which must be accounted for).

Also add hash file.

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/rng-tools/Config.in

@@ -1,6 +1,8 @@
 config BR2_PACKAGE_RNG_TOOLS
 	bool "rng-tools"
 	select BR2_PACKAGE_ARGP_STANDALONE if BR2_TOOLCHAIN_USES_UCLIBC
+	# For rdrand ligcrypt is required and it's not obvious to users
+	select BR2_PACKAGE_LIBGCRYPT if BR2_i386 || BR2_x86_64
 	help
 	  Daemon to use hardware random number generators.
 

package/rng-tools/rng-tools.hash

@@ -0,0 +1,3 @@
+# From http://sourceforge.net/projects/gkernel/files/rng-tools/5/
+md5	6726cdc6fae1f5122463f24ae980dd68	rng-tools-5.tar.gz
+sha1	3092768ac45315a5dcc0170d05566d1d00dbad96	rng-tools-5.tar.gz

package/rng-tools/rng-tools.mk

@@ -4,13 +4,21 @@
 #
 ################################################################################
 
-RNG_TOOLS_VERSION = 4
+RNG_TOOLS_VERSION = 5
 RNG_TOOLS_SITE = http://downloads.sourceforge.net/project/gkernel/rng-tools/$(RNG_TOOLS_VERSION)
-ifeq ($(BR2_TOOLCHAIN_USES_UCLIBC),y)
-RNG_TOOLS_CONF_ENV = LIBS="-largp"
-RNG_TOOLS_DEPENDENCIES = argp-standalone
-endif
 RNG_TOOLS_LICENSE = GPLv2
 RNG_TOOLS_LICENSE_FILES = COPYING
 
+# Work around for uClibc's lack of argp_*() functions
+ifeq ($(BR2_TOOLCHAIN_USES_UCLIBC),y)
+RNG_TOOLS_CONF_ENV += LIBS="-largp"
+RNG_TOOLS_DEPENDENCIES += argp-standalone
+endif
+
+ifeq ($(BR2_PACKAGE_LIBGCRYPT),y)
+RNG_TOOLS_DEPENDENCIES += libgcrypt
+else
+RNG_TOOLS_CONF_OPTS += --without-libgcrypt
+endif
+
 $(eval $(autotools-package))