lxc: fix compilation error for ARM/ARM64

There's compilation error when building lxc for ARM/ARM64 BSPs.
The error message is as below:

  | ../git/src/lxc/cgroups/cgfsng.c:1234:111: error: incompatible
    type for argument 10 of 'sd_bus_call_method_asyncv'

The 10th argument is of type va_list but NULL is supplied, thus causing
compilation error.

So we use sd_bus_call_method_async to replace the asyncv one to
solve this issue.

Signed-off-by: Chen Qi <Qi.Chen@windriver.com>
Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com>

2 files changed, 50 insertions, 0 deletions

diff --git a/recipes-containers/lxc/files/0001-use-sd_bus_call_method_async-to-replace-the-asyncv-o.patch b/recipes-containers/lxc/files/0001-use-sd_bus_call_method_async-to-replace-the-asyncv-o.patch
new file mode 100644
index 00000000..ef87a0ce
--- /dev/null
+++ b/recipes-containers/lxc/files/0001-use-sd_bus_call_method_async-to-replace-the-asyncv-o.patch
@@ -0,0 +1,49 @@
+From b0abedf60b40adf0f2fb3cf9dfee4bc601f7b39f Mon Sep 17 00:00:00 2001
+From: Chen Qi <Qi.Chen@windriver.com>
+Date: Thu, 25 Aug 2022 05:45:53 -0700
+Subject: [PATCH] use sd_bus_call_method_async to replace the asyncv one
+
+The sd_bus_call_method_asyncv's 10th parameter is of type
+va_list and supplying NULL when invoking it causes compilation
+error. Just replace it with the async one.
+
+Upstream-Status: Submitted [https://github.com/lxc/lxc/pull/4187]
+
+Signed-off-by: Chen Qi <Qi.Chen@windriver.com>
+---
+ meson.build              | 4 ++--
+ src/lxc/cgroups/cgfsng.c | 2 +-
+ 2 files changed, 3 insertions(+), 3 deletions(-)
+
+diff --git a/meson.build b/meson.build
+index 21955a050..f8bdcf4e8 100644
+--- a/meson.build
++++ b/meson.build
+@@ -295,9 +295,9 @@ if not want_sd_bus.disabled()
+         has_sd_bus = false
+     endif
+ 
+-    if not cc.has_function('sd_bus_call_method_asyncv', prefix: '#include <systemd/sd-bus.h>', dependencies: libsystemd) 
++    if not cc.has_function('sd_bus_call_method_async', prefix: '#include <systemd/sd-bus.h>', dependencies: libsystemd) 
+         if not sd_bus_optional
+-            error('libsystemd misses required sd_bus_call_method_asyncv function')
++            error('libsystemd misses required sd_bus_call_method_async function')
+         endif
+ 
+         has_sd_bus = false
+diff --git a/src/lxc/cgroups/cgfsng.c b/src/lxc/cgroups/cgfsng.c
+index 8a3615893..d90e5385e 100644
+--- a/src/lxc/cgroups/cgfsng.c
++++ b/src/lxc/cgroups/cgfsng.c
+@@ -1232,7 +1232,7 @@ static int unpriv_systemd_create_scope(struct cgroup_ops *ops, struct lxc_conf *
+        if (r < 0)
+                return log_error(SYSTEMD_SCOPE_FAILED, "Failed to connect to user bus: %s", strerror(-r));
+ 
+-       r = sd_bus_call_method_asyncv(bus, NULL, DESTINATION, PATH, INTERFACE, "Subscribe", NULL, NULL, NULL, NULL);
++       r = sd_bus_call_method_async(bus, NULL, DESTINATION, PATH, INTERFACE, "Subscribe", NULL, NULL, NULL);
+        if (r < 0)
+                return log_error(SYSTEMD_SCOPE_FAILED, "Failed to subscribe to signals: %s", strerror(-r));
+ 
+-- 
+2.37.1
+
diff --git a/recipes-containers/lxc/lxc_git.bb b/recipes-containers/lxc/lxc_git.bb
index bcc17953..9cabe054 100644
--- a/recipes-containers/lxc/lxc_git.bb
+++ b/recipes-containers/lxc/lxc_git.bb
@@ -44,6 +44,7 @@ SRC_URI = "git://github.com/lxc/lxc.git;branch=master;protocol=https \
         file://templates-use-curl-instead-of-wget.patch \
         file://0001-download-don-t-try-compatbility-index.patch \
         file://tests-our-init-is-not-busybox.patch \
+        file://0001-use-sd_bus_call_method_async-to-replace-the-asyncv-o.patch \
         file://dnsmasq.conf \
         file://lxc-net \
         "