[PATCH] rng-tools: Fix underquoted m4 and libgcrypt floating dependency

[Richard Purdie <richard.purdie@linuxfoundation.org>]

The underquoted m4 caused build failures if libgcrypt wasn't present. The floating
dependency on libgcrypt was just plain incorrect, particularly given the incorrect
libgcrypt RDEPENDS. Change to use PACKAGECONFIG an default to on.

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

diff --git a/meta/recipes-support/rng-tools/rng-tools/underquote.patch b/meta/recipes-support/rng-tools/rng-tools/underquote.patch
new file mode 100644
index 0000000..1422571
--- /dev/null
+++ b/meta/recipes-support/rng-tools/rng-tools/underquote.patch
@@ -0,0 +1,31 @@
+Fix underquoted m4 entry. This causes a failure if gcrypt isn't present:
+
+| configure: libgcrypt support disabled
+| ../rng-tools-5/configure: line 4345: ac_fn_c_try_link: command not found
+| configure: error: in `/media/build1/poky/build/tmp/work/i586-poky-linux/rng-tools/5-r0/build':
+
+RP
+2016/2/16
+
+Index: rng-tools-5/configure.ac
+===================================================================
+--- rng-tools-5.orig/configure.ac
++++ rng-tools-5/configure.ac
+@@ -71,7 +71,7 @@ AS_IF(
+ 	[test "x$with_libgcrypt" != "xno"],
+ 	[
+ 		AC_CHECK_HEADER([gcrypt.h],
+-			AC_CHECK_LIB(
++			[AC_CHECK_LIB(
+ 				[gcrypt],
+ 				[gcry_check_version], ,
+ 				[
+@@ -80,7 +80,7 @@ AS_IF(
+ 						AC_MSG_NOTICE([libgcrypt support disabled])
+ 					fi
+ 				]
+-			),
++			)],
+ 			[if test "x$with_libgcrypt" != "xcheck"; then
+ 				AC_MSG_FAILURE([libgcrypt headers not found]); else
+ 				AC_MSG_NOTICE([libgcrypt support disabled])
diff --git a/meta/recipes-support/rng-tools/rng-tools_5.bb b/meta/recipes-support/rng-tools/rng-tools_5.bb
index 9a19d1c..bc67990 100644
--- a/meta/recipes-support/rng-tools/rng-tools_5.bb
+++ b/meta/recipes-support/rng-tools/rng-tools_5.bb
@@ -5,6 +5,7 @@ LIC_FILES_CHKSUM = "file://COPYING;md5=0b6f033afe6db235e559456585dc8cdc"
 SRC_URI = "http://heanet.dl.sourceforge.net/sourceforge/gkernel/${BP}.tar.gz \
            file://0001-If-the-libc-is-lacking-argp-use-libargp.patch \
            file://0002-Add-argument-to-control-the-libargp-dependency.patch \
+           file://underquote.patch \
            file://init \
            file://default"
 
@@ -20,12 +21,11 @@ python () {
 
 inherit autotools update-rc.d
 
-PACKAGECONFIG = ""
+PACKAGECONFIG = "libgcrypt"
 PACKAGECONFIG_libc-musl = "libargp"
 PACKAGECONFIG_libc-uclibc = "libargp"
 PACKAGECONFIG[libargp] = "--with-libargp,--without-libargp,argp-standalone,"
-
-RDEPENDS_${PN} = "libgcrypt"
+PACKAGECONFIG[libgcrypt] = "--with-libgcrypt,--without-libgcrypt,libgcrypt,"
 
 do_install_append() {
     # Only install the init script when 'sysvinit' is in DISTRO_FEATURES.