[Buildroot] [PATCH 1/2] package/netopeer2: set SYSREPO_SHM_PREFIX and cleanup shm files after installation

[Heiko Thiery]

On install step the host tool syrepoctl is used to install some YANG
modules. Unfortunatly syrepoctl creates some files in /dev/shm folder and
does not cleanup afterwards. This files can be incompatible depending on
the used sysrepo version. This causes autobuilder failures when updating
the package [1].

To make sure we can remove this leftovers of sysrepoctl we specify a
build specific SYSREPO_SHM_PREFIX. With this the files can deleted safely
after installation is completed. This also ensures that concurrent
parallel builds will not affected mutualy.

Fixes:
 [1] http://autobuild.buildroot.net/results/6e559c4f98b7ed93d7b5af638264e907492a6532/

Co-Developed-by: Yann E. MORIN <yann.morin.1998 at free.fr>
Signed-off-by: Heiko Thiery <heiko.thiery at gmail.com>
---
 package/netopeer2/netopeer2.mk | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/package/netopeer2/netopeer2.mk b/package/netopeer2/netopeer2.mk
index bc02e0dc93..af30d8417a 100644
--- a/package/netopeer2/netopeer2.mk
+++ b/package/netopeer2/netopeer2.mk
@@ -13,9 +13,23 @@ NETOPEER2_DEPENDENCIES = libnetconf2 libyang sysrepo
 
 NETOPEER2_CONF_OPTS = -DBUILD_CLI=$(if $(BR2_PACKAGE_NETOPEER2_CLI),ON,OFF)
 
+# Set a build specific SYSREPO_SHM_PREFIX to ensure we can safely delete the
+# files. This also ensures that concurrent parallel builds will not be
+# affected mutualy.
+SYSREPO_SHM_PREFIX = sr_buildroot$(subst /,_,$(CONFIG_DIR))
+NETOPEER2_MAKE_ENV = SYSREPO_SHM_PREFIX=$(SYSREPO_SHM_PREFIX)
+
 define NETOPEER2_INSTALL_INIT_SYSV
 	$(INSTALL) -m 755 -D package/netopeer2/S52netopeer2 \
 		$(TARGET_DIR)/etc/init.d/S52netopeer2
 endef
 
+# The host sysrepo used to install the netopeer2 modules will leave
+# its shared memory files lingering about. Clean up in it's stead...
+define NETOPEER2_CLEANUP
+   rm -f /dev/shm/$(SYSREPO_SHM_PREFIX)*
+endef
+NETOPEER2_PRE_INSTALL_TARGET_HOOKS += NETOPEER2_CLEANUP
+NETOPEER2_POST_INSTALL_TARGET_HOOKS += NETOPEER2_CLEANUP
+
 $(eval $(cmake-package))
-- 
2.20.1