From 123bb1af7bfae41d805337fef4b41045ef6c7d25 Mon Sep 17 00:00:00 2001
From: Max Bruckner <max@maxbruckner.de>
Date: Wed, 15 Feb 2017 23:21:50 +0100
Subject: [PATCH] cJSON: prevent incompatible C and header versions

Introduces a preprocessor directive that aborts the compilation if the
version numbers in the header don't match with the numbers in the c
file.
---
 cJSON.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/cJSON.c b/cJSON.c
index cf534ba..204b863 100644
--- a/cJSON.c
+++ b/cJSON.c
@@ -58,6 +58,11 @@ const char *cJSON_GetErrorPtr(void)
     return (const char*) global_ep;
 }
 
+/* This is a safeguard to prevent copy-pasters from using incompatible C and header files */
+#if (CJSON_VERSION_MAJOR != 1) || (CJSON_VERSION_MINOR != 2) || (CJSON_VERSION_PATCH != 1)
+    #error cJSON.h and cJSON.c have different versions. Make sure that both have the same.
+#endif
+
 extern const char* cJSON_Version(void)
 {
     static char version[15];