coreutils: add optionals, use single binary

Add proper support for optional libraries: acl, attr, gmp & libcap.

Also build the single binary as pointed out by Pádraig Brady for some
neat space savings.
Use the shebang (default) method since it allows us to move binaries
into other directories to suit our needs whereas for symlink that
wouldn't be so easy.

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

package/coreutils/coreutils.mk

@@ -20,6 +20,30 @@ ifeq ($(BR2_PACKAGE_BUSYBOX),y)
 COREUTILS_DEPENDENCIES = busybox
 endif
 
+ifeq ($(BR2_PACKAGE_ACL),y)
+COREUTILS_DEPENDENCIES += acl
+else
+COREUTILS_CONF_OPTS += --disable-acl
+endif
+
+ifeq ($(BR2_PACKAGE_ATTR),y)
+COREUTILS_DEPENDENCIES += attr
+else
+COREUTILS_CONF_OPTS += --disable-xattr
+endif
+
+ifeq ($(BR2_PACKAGE_GMP),y)
+COREUTILS_DEPENDENCIES += gmp
+else
+COREUTILS_CONF_OPTS += --without-gmp
+endif
+
+ifeq ($(BR2_PACKAGE_LIBCAP),y)
+COREUTILS_DEPENDENCIES += libcap
+else
+COREUTILS_CONF_OPTS += --disable-libcap
+endif
+
 COREUTILS_BIN_PROGS = cat chgrp chmod chown cp date dd df dir echo false \
 	ln ls mkdir mknod mv pwd rm rmdir vdir sleep stty sync touch true \
 	uname join
@@ -61,7 +85,7 @@ COREUTILS_CONF_ENV = ac_cv_c_restrict=no \
 		utils_cv_localtime_cache=no \
 		PERL=missing
 
-COREUTILS_CONF_OPTS = --disable-rpath
+COREUTILS_CONF_OPTS = --disable-rpath --enable-single-binary=shebangs
 
 define COREUTILS_POST_INSTALL
 	# some things go in root rather than usr