new file mode 100644
@@ -0,0 +1,50 @@
+From aab792578b4f081af6ed7b993475bcb2dbca8912 Mon Sep 17 00:00:00 2001
+From: Eric Hawicz <erh+git@nimenees.com>
+Date: Sat, 11 Jul 2026 09:28:49 -0400
+Subject: [PATCH] Issue #941: fix "defined but not used" errors when building
+ with a c++ compiler.
+
+
+Upstream-Status: Backport [https://github.com/json-c/json-c/commit/aab792578b4f081af6ed7b993475bcb2dbca8912]
+Signed-off-by: Eric Hawicz <erh+git@nimenees.com>
+Signed-off-by: Adam Duskett <adam.duskett@amarulasolutions.com>
+---
+ json_object.h | 4 ++--
+ linkhash.h | 2 +-
+ 2 files changed, 3 insertions(+), 3 deletions(-)
+
+diff --git a/json_object.h b/json_object.h
+index 7edb63d4f8..2cd94906e7 100644
+--- a/json_object.h
++++ b/json_object.h
+@@ -488,7 +488,7 @@ JSON_EXPORT void json_object_object_del(struct json_object *obj, const char *key
+ * @param val the local name for the json_object* object variable defined in
+ * the body
+ */
+-#if defined(__GNUC__) && !defined(__STRICT_ANSI__) && (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L)
++#if defined(__GNUC__) && !defined(__STRICT_ANSI__) && (defined(__cplusplus) || (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L))
+
+ #define json_object_object_foreach(obj, key, val) \
+ char *key = NULL; \
+@@ -520,7 +520,7 @@ JSON_EXPORT void json_object_object_del(struct json_object *obj, const char *key
+ : 0); \
+ entry##key = entry_next##key)
+
+-#endif /* defined(__GNUC__) && !defined(__STRICT_ANSI__) && (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L) */
++#endif
+
+ /** Iterate through all keys and values of an object (ANSI C Safe)
+ * @param obj the json_object instance
+diff --git a/linkhash.h b/linkhash.h
+index 5ad17cf2d2..48fb7c0b0a 100644
+--- a/linkhash.h
++++ b/linkhash.h
+@@ -345,7 +345,7 @@ int lh_table_resize(struct lh_table *t, int new_size);
+ /**
+ * @deprecated Don't use this outside of linkhash.h:
+ */
+-#if !defined (__STDC_VERSION__) || (__STDC_VERSION__ < 199901L)
++#if !defined(__cplusplus) && (!defined (__STDC_VERSION__) || (__STDC_VERSION__ < 199901L))
+ /* C89 compilers like VS2010 can't handle inline funcs, so skip it there,
+ note: this also applies to -std=c89 in GCC! */
+ #define _LH_INLINE
@@ -7,6 +7,7 @@ LICENSE = "MIT"
LIC_FILES_CHKSUM = "file://COPYING;md5=de54b60fbbc35123ba193fea8ee216f2"
SRC_URI = "https://s3.amazonaws.com/json-c_releases/releases/${BP}.tar.gz \
+ file://0001-fix-defined-but-not-used-errors-when-building-with-a-cpp-compiler.patch \
file://run-ptest \
"
SRC_URI[sha256sum] = "37ad0249902e301bd9052bf712e511fcc6acff4ecaad4b5900aad9ce564e26de"
Backported from upstream commit aab792578b4f081af6ed7b993475bcb2dbca8912 Signed-off-by: Adam Duskett <adam.duskett@amarulasolutions.com> --- ...rs-when-building-with-a-cpp-compiler.patch | 50 +++++++++++++++++++ meta/recipes-devtools/json-c/json-c_0.19.bb | 1 + 2 files changed, 51 insertions(+) create mode 100644 meta/recipes-devtools/json-c/json-c/0001-fix-defined-but-not-used-errors-when-building-with-a-cpp-compiler.patch