[Buildroot] [PATCH] package/refpolicy: make sure xmllint is used

[Antoine Tenart]

When parsing and adding modules the refpolicy build system checks their
validity using xmllint. By default the host system version is used and
if not found an error is displayed but the build is not stopped. This
leads to interesting issues where modules are not added correctly to
modules.conf[1] (other possible issues are likely).

Fix this by adding a dependency on host-libxml2 and explicitly use the
xmllint binary built by Buildroot.

[1] https://lore.kernel.org/buildroot/20210830114531.2285178-1-jose.pekkarinen@unikie.com/

Tested-by: José Pekkarinen <jose.pekkarinen at unikie.com>
Signed-off-by: Antoine Tenart <atenart at kernel.org>
---
 package/refpolicy/refpolicy.mk | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/package/refpolicy/refpolicy.mk b/package/refpolicy/refpolicy.mk
index eb345d0f98c9..975c3b584c42 100644
--- a/package/refpolicy/refpolicy.mk
+++ b/package/refpolicy/refpolicy.mk
@@ -14,7 +14,8 @@ REFPOLICY_DEPENDENCIES = \
 	host-policycoreutils \
 	host-python3 \
 	host-setools \
-	host-gawk
+	host-gawk \
+	host-libxml2
 
 ifeq ($(BR2_PACKAGE_REFPOLICY_CUSTOM_GIT),y)
 REFPOLICY_VERSION = $(call qstrip,$(BR2_PACKAGE_REFPOLICY_CUSTOM_REPO_VERSION))
@@ -30,6 +31,7 @@ endif
 # Cannot use multiple threads to build the reference policy
 REFPOLICY_MAKE = \
 	PYTHON=$(HOST_DIR)/usr/bin/python3 \
+	XMLLINT=$(LIBXML2_HOST_BINARY) \
 	TEST_TOOLCHAIN=$(HOST_DIR) \
 	$(TARGET_MAKE_ENV) \
 	$(MAKE1)
-- 
2.31.1