[oe] [meta-oe][PATCH] libfastjson: backport patch to fix compilation error

[Qi.Chen at windriver.com]

From: Chen Qi <Qi.Chen at windriver.com>

I've met the following compilation error.

  | ../git/json_object.c:415:3: error: jump skips variable initialization [-Werror=jump-misses-init]

Backport a patch to fix it.

Signed-off-by: Chen Qi <Qi.Chen at windriver.com>
---
 .../0001-fix-jump-misses-init-gcc-8-warning.patch  | 46 ++++++++++++++++++++++
 .../recipes-extended/rsyslog/libfastjson_0.99.8.bb |  3 +-
 2 files changed, 48 insertions(+), 1 deletion(-)
 create mode 100644 meta-oe/recipes-extended/rsyslog/libfastjson/0001-fix-jump-misses-init-gcc-8-warning.patch

diff --git a/meta-oe/recipes-extended/rsyslog/libfastjson/0001-fix-jump-misses-init-gcc-8-warning.patch b/meta-oe/recipes-extended/rsyslog/libfastjson/0001-fix-jump-misses-init-gcc-8-warning.patch
new file mode 100644
index 0000000..25e5efa
--- /dev/null
+++ b/meta-oe/recipes-extended/rsyslog/libfastjson/0001-fix-jump-misses-init-gcc-8-warning.patch
@@ -0,0 +1,46 @@
+From d697182f18a421b7f80ea9de4914251b55d82532 Mon Sep 17 00:00:00 2001
+From: Rainer Gerhards <rgerhards at adiscon.com>
+Date: Sun, 15 Jul 2018 17:24:59 +0200
+Subject: [PATCH] "fix" "jump-misses-init" gcc-8 warning
+
+Actually, that warning is overly conservative, and so we
+have changed the code in a somewhat suboptimal way to "fix"
+it. In this spots, it's not that bad and we wanted to avoid
+totally disabling this warning.
+
+If it were more costly in terms of cleanness, we would probaly
+have done that. Just mention it to tell anyone else the
+cure is not really a good one, just selected due to the
+circumstances in this special case.
+
+Upstream-Status: Backport
+
+Signed-off-by: Chen Qi <Qi.Chen at windriver.com>
+---
+ json_object.c | 3 ++-
+ 1 file changed, 2 insertions(+), 1 deletion(-)
+
+diff --git a/json_object.c b/json_object.c
+index 35338e1..6e67891 100644
+--- a/json_object.c
++++ b/json_object.c
+@@ -396,6 +396,7 @@ fjson_child_get_empty_etry(struct fjson_object *const __restrict__ jso)
+ {
+ 	struct _fjson_child *chld = NULL;
+ 	struct _fjson_child_pg *pg;
++	int pg_idx;
+ 
+ 	if (jso->o.c_obj.ndeleted > 0) {
+ 		/* we first fill deleted spots */
+@@ -415,7 +416,7 @@ fjson_child_get_empty_etry(struct fjson_object *const __restrict__ jso)
+ 		goto done;
+ 	}
+ 
+-	const int pg_idx = jso->o.c_obj.nelem % FJSON_OBJECT_CHLD_PG_SIZE;
++	pg_idx = jso->o.c_obj.nelem % FJSON_OBJECT_CHLD_PG_SIZE;
+ 	if (jso->o.c_obj.nelem > 0 && pg_idx == 0) {
+ 		if((pg = calloc(1, sizeof(struct _fjson_child_pg))) == NULL) {
+ 			errno = ENOMEM;
+-- 
+2.11.0
+
diff --git a/meta-oe/recipes-extended/rsyslog/libfastjson_0.99.8.bb b/meta-oe/recipes-extended/rsyslog/libfastjson_0.99.8.bb
index ea089de..b84dde3 100644
--- a/meta-oe/recipes-extended/rsyslog/libfastjson_0.99.8.bb
+++ b/meta-oe/recipes-extended/rsyslog/libfastjson_0.99.8.bb
@@ -6,7 +6,8 @@ LIC_FILES_CHKSUM = "file://COPYING;md5=a958bb07122368f3e1d9b2efe07d231f"
 
 DEPENDS = ""
 
-SRC_URI = "git://github.com/rsyslog/libfastjson.git;protocol=https"
+SRC_URI = "git://github.com/rsyslog/libfastjson.git;protocol=https \
+           file://0001-fix-jump-misses-init-gcc-8-warning.patch"
 
 SRCREV = "4758b1caf69ada911ef79e1d80793fe489b98dff"
 
-- 
1.9.1