syslog-ng: workaround segfault for ppc64le

For now syslog-ng segfaults on ppc64le. The problem could be reproduced
by simply adding syslog-ng to IMAGE_INSTALL and then building and starting
an image for qemuppc64.

The underlying root cause is unknown yet. This workaround, on the other hand,
helps improve the situation a little bit in the sense that users can at least
use syslog-ng on ppc64le targets.

Note that this workaround should be dropped once the upstream issues[1][2]
are fixed. This has also stated very clearly in the patch.

[1] https://sourceware.org/bugzilla/show_bug.cgi?id=30062
[2] https://github.com/syslog-ng/syslog-ng/issues/4285

Signed-off-by: Chen Qi <Qi.Chen@windriver.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-oe/recipes-support/syslog-ng/files/0001-plugin.c-workaround-powerpc64le-segfaults-error.patch

@@ -0,0 +1,46 @@
+From 616446afab61ab98b28c81605e2efd4a689f37d1 Mon Sep 17 00:00:00 2001
+From: Chen Qi <Qi.Chen@windriver.com>
+Date: Fri, 20 Jan 2023 14:59:14 +0800
+Subject: [PATCH] plugin.c: workaround powerpc64le segfaults error
+
+syslog-ng segfaults on powerpc64le, workaround this error.
+See https://github.com/syslog-ng/syslog-ng/issues/4285 and
+https://sourceware.org/bugzilla/show_bug.cgi?id=30062 for more details.
+This patch should be dropped once the above issues are fixed.
+
+Upstream-Status: Inappropriate [OE Specific]
+
+Signed-off-by: Chen Qi <Qi.Chen@windriver.com>
+---
+ lib/plugin.c | 8 ++------
+ 1 file changed, 2 insertions(+), 6 deletions(-)
+
+diff --git a/lib/plugin.c b/lib/plugin.c
+index fbbfb92..3a03617 100644
+--- a/lib/plugin.c
++++ b/lib/plugin.c
+@@ -528,10 +528,7 @@ plugin_discover_candidate_modules(PluginContext *context)
+                     }
+                 }
+               g_free(module_name);
+-              if (mod)
+-                g_module_close(mod);
+-              else
+-                mod = NULL;
++              mod = NULL;
+             }
+         }
+       g_dir_close(dir);
+@@ -663,8 +660,7 @@ plugin_list_modules(FILE *out, gboolean verbose)
+                   first = FALSE;
+                 }
+               g_free(module_name);
+-              if (mod)
+-                g_module_close(mod);
++              mod = NULL;
+             }
+         }
+       g_dir_close(dir);
+-- 
+2.17.1
+

meta-oe/recipes-support/syslog-ng/syslog-ng_3.38.1.bb

@@ -23,6 +23,7 @@ SRC_URI = "https://github.com/balabit/syslog-ng/releases/download/${BP}/${BP}.ta
            file://syslog-ng-tmp.conf \
            file://syslog-ng.service-the-syslog-ng-service.patch \
 "
+SRC_URI:append:powerpc64le = " file://0001-plugin.c-workaround-powerpc64le-segfaults-error.patch"
 
 SRC_URI[sha256sum] = "5491f686d0b829b69b2e0fc0d66a62f51991aafaee005475bfa38fab399441f7"