package/s6-linux-utils: add option to build multicall binary

Since version 2.6.1.0, with another bugfix in 2.6.2.0, s6-linux-utils
can be built as a multicall binary, similar to busybox.

Signed-off-by: J. Neuschäfer <j.neuschaefer@gmx.net>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/s6-linux-utils/Config.in

@@ -7,3 +7,13 @@ config BR2_PACKAGE_S6_LINUX_UTILS
 	  system utilities.
 
 	  http://skarnet.org/software/s6-linux-utils/
+
+if BR2_PACKAGE_S6_LINUX_UTILS
+
+config BR2_PACKAGE_S6_LINUX_UTILS_MULTICALL
+	bool "s6-linux-utils multicall binary"
+	help
+	  Build s6-linux-utils as a multicall binary to save disk
+	  space.
+
+endif

package/s6-linux-utils/s6-linux-utils.mk

@@ -17,6 +17,7 @@ S6_LINUX_UTILS_CONF_OPTS = \
 	--with-dynlib=$(STAGING_DIR)/lib \
 	--with-lib=$(STAGING_DIR)/lib/skalibs \
 	$(if $(BR2_STATIC_LIBS),,--disable-allstatic) \
+	$(if $(BR2_PACKAGE_S6_LINUX_UTILS_MULTICALL),--enable-multicall,) \
 	$(SHARED_STATIC_LIBS_OPTS)
 
 define S6_LINUX_UTILS_CONFIGURE_CMDS