When attr was compiled before, patch will use it as optional dependency:
$ output/host/usr/bin/x86_64-linux-readelf -a output/target/usr/bin/patch | grep NEEDED
0x0000000000000001 (NEEDED) Shared library: [libattr.so.1]
0x0000000000000001 (NEEDED) Shared library: [libc.so.1]
Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
PATCH_LICENSE = GPLv3+
PATCH_LICENSE_FILES = COPYING
+ifeq ($(BR2_PACKAGE_ATTR),y)
+PATCH_CONF_OPTS += --enable-attr
+PATCH_DEPENDENCIES += attr
+else
+PATCH_CONF_OPTS += --disable-attr
+endif
+
$(eval $(autotools-package))