Fix build of json-c on newer hostsdab

Newer hosts with gcc >= 7.1 might fail to compile json-c.

Fix by backporting patchset.

Change-Id: Ic089a30d2ad1096ac3b1ef86f842eeab4460cfe1
Signed-off-by: Jan-Simon Möller <jsmoeller@linuxfoundation.org>

1 files changed, 100 insertions, 0 deletions

diff --git a/meta-agl-bsp/meta-core/recipes-devtools/json-c/files/0001-Add-FALLTHRU-comment-to-handle-GCC7-warnings.patch b/meta-agl-bsp/meta-core/recipes-devtools/json-c/files/0001-Add-FALLTHRU-comment-to-handle-GCC7-warnings.patch
new file mode 100644
index 000000000..fb130f2f1
--- /dev/null
+++ b/meta-agl-bsp/meta-core/recipes-devtools/json-c/files/0001-Add-FALLTHRU-comment-to-handle-GCC7-warnings.patch
@@ -0,0 +1,100 @@
+From 14edbe3c04101a2f967862ccf162f725235f627f Mon Sep 17 00:00:00 2001
+From: marxin <mliska@suse.cz>
+Date: Tue, 21 Mar 2017 08:42:11 +0100
+Subject: [PATCH] Add FALLTHRU comment to handle GCC7 warnings.
+
+---
+ json_object.c  | 30 +++++++++++++++++-------------
+ json_tokener.c |  1 +
+ linkhash.c     | 22 +++++++++++-----------
+ 3 files changed, 29 insertions(+), 24 deletions(-)
+
+diff --git a/json_object.c b/json_object.c
+index 6cc73bc..e271083 100644
+--- a/json_object.c
++++ b/json_object.c
+@@ -542,19 +542,23 @@ int64_t json_object_get_int64(struct json_object *jso)
+ {
+    int64_t cint;
+ 
+-  if(!jso) return 0;
+-  switch(jso->o_type) {
+-  case json_type_int:
+-    return jso->o.c_int64;
+-  case json_type_double:
+-    return (int64_t)jso->o.c_double;
+-  case json_type_boolean:
+-    return jso->o.c_boolean;
+-  case json_type_string:
+-	if (json_parse_int64(jso->o.c_string.str, &cint) == 0) return cint;
+-  default:
+-    return 0;
+-  }
++	if (!jso)
++		return 0;
++	switch(jso->o_type)
++	{
++	case json_type_int:
++		return jso->o.c_int64;
++	case json_type_double:
++		return (int64_t)jso->o.c_double;
++	case json_type_boolean:
++		return jso->o.c_boolean;
++	case json_type_string:
++		if (json_parse_int64(jso->o.c_string.str, &cint) == 0)
++			return cint;
++		/* FALLTHRU */
++	default:
++		return 0;
++	}
+ }
+ 
+ 
+diff --git a/json_tokener.c b/json_tokener.c
+index 19de8ef..fbb5d68 100644
+--- a/json_tokener.c
++++ b/json_tokener.c
+@@ -305,6 +305,7 @@ struct json_object* json_tokener_parse_ex(struct json_tokener *tok,
+             tok->err = json_tokener_error_parse_unexpected;
+             goto out;
+         }
++	/* FALLTHRU */
+       case '"':
+ 	state = json_tokener_state_string;
+ 	printbuf_reset(tok->pb);
+diff --git a/linkhash.c b/linkhash.c
+index 712c387..74e3b0f 100644
+--- a/linkhash.c
++++ b/linkhash.c
+@@ -376,17 +376,17 @@ static uint32_t hashlittle( const void *key, size_t length, uint32_t initval)
+     /*-------------------------------- last block: affect all 32 bits of (c) */
+     switch(length)                   /* all the case statements fall through */
+     {
+-    case 12: c+=((uint32_t)k[11])<<24;
+-    case 11: c+=((uint32_t)k[10])<<16;
+-    case 10: c+=((uint32_t)k[9])<<8;
+-    case 9 : c+=k[8];
+-    case 8 : b+=((uint32_t)k[7])<<24;
+-    case 7 : b+=((uint32_t)k[6])<<16;
+-    case 6 : b+=((uint32_t)k[5])<<8;
+-    case 5 : b+=k[4];
+-    case 4 : a+=((uint32_t)k[3])<<24;
+-    case 3 : a+=((uint32_t)k[2])<<16;
+-    case 2 : a+=((uint32_t)k[1])<<8;
++    case 12: c+=((uint32_t)k[11])<<24; /* FALLTHRU */
++    case 11: c+=((uint32_t)k[10])<<16; /* FALLTHRU */
++    case 10: c+=((uint32_t)k[9])<<8; /* FALLTHRU */
++    case 9 : c+=k[8]; /* FALLTHRU */
++    case 8 : b+=((uint32_t)k[7])<<24; /* FALLTHRU */
++    case 7 : b+=((uint32_t)k[6])<<16; /* FALLTHRU */
++    case 6 : b+=((uint32_t)k[5])<<8; /* FALLTHRU */
++    case 5 : b+=k[4]; /* FALLTHRU */
++    case 4 : a+=((uint32_t)k[3])<<24; /* FALLTHRU */
++    case 3 : a+=((uint32_t)k[2])<<16; /* FALLTHRU */
++    case 2 : a+=((uint32_t)k[1])<<8; /* FALLTHRU */
+     case 1 : a+=k[0];
+              break;
+     case 0 : return c;
+-- 
+2.16.4
+