From e69db83de5533e9817195ca82b7c0d178d0d3ab2 Mon Sep 17 00:00:00 2001
From: Stephan <stephan.gatzka@gmail.com>
Date: Thu, 8 Dec 2016 13:21:18 +0100
Subject: [PATCH 1/2] Temporarily disable warning when const is cast away.

There was a long running discussion here
https://github.com/DaveGamble/cJSON/pull/80 how to provide const
correctness for users of cJSON.

To avoid breaking changes for users of cJSON v1 it was decided to
disable this warning.

pragma was tested with gcc 5.4.0/6.2.1 and clang 3.8/3.9.
---
 cJSON.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/cJSON.c b/cJSON.c
index bba72d8..a409c8d 100644
--- a/cJSON.c
+++ b/cJSON.c
@@ -1756,7 +1756,10 @@ void   cJSON_AddItemToObjectCS(cJSON *object, const char *string, cJSON *item)
     {
         cJSON_free(item->string);
     }
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wcast-qual"
     item->string = (char*)string;
+#pragma GCC diagnostic pop
     item->type |= cJSON_StringIsConst;
     cJSON_AddItemToArray(object, item);
 }

From 89edfb6741a13181bc11ff7666b7658af050e93c Mon Sep 17 00:00:00 2001
From: Stephan Gatzka <stephan.gatzka@gmail.com>
Date: Wed, 7 Dec 2016 12:50:00 +0100
Subject: [PATCH 2/2] Warn if cast removes a type qualifier like const.

---
 CMakeLists.txt | 2 +-
 Makefile       | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 6deeecf..61294bd 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -15,7 +15,7 @@ set(PROJECT_VERSION "${PROJECT_VERSION_MAJOR}.${PROJECT_VERSION_MINOR}.${PROJECT
 option(ENABLE_CUSTOM_COMPILER_FLAGS "Enables custom compiler flags for Clang and GCC" ON)
 if (ENABLE_CUSTOM_COMPILER_FLAGS)
     if(("${CMAKE_C_COMPILER_ID}" MATCHES "GNU") OR ("${CMAKE_C_COMPILER_ID}" MATCHES "Clang"))
-        set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -std=c89 -pedantic -Wall -Wextra -Werror -Wstrict-prototypes -Wwrite-strings -Wshadow -Winit-self -Wcast-align -Wformat=2 -Wmissing-prototypes -Wstrict-overflow=2")
+        set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -std=c89 -pedantic -Wall -Wextra -Werror -Wstrict-prototypes -Wwrite-strings -Wshadow -Winit-self -Wcast-align -Wformat=2 -Wmissing-prototypes -Wstrict-overflow=2 -Wcast-qual")
     endif()
 endif()
 
diff --git a/Makefile b/Makefile
index c56618c..8c76794 100644
--- a/Makefile
+++ b/Makefile
@@ -23,7 +23,7 @@ INSTALL_LIBRARY_PATH = $(DESTDIR)$(PREFIX)/$(LIBRARY_PATH)
 
 INSTALL ?= cp -a
 
-R_CFLAGS = -fPIC -std=c89 -pedantic -Wall -Werror -Wstrict-prototypes -Wwrite-strings -Wshadow -Winit-self -Wcast-align -Wformat=2 -Wmissing-prototypes -Wstrict-overflow=2 $(CFLAGS)
+R_CFLAGS = -fPIC -std=c89 -pedantic -Wall -Werror -Wstrict-prototypes -Wwrite-strings -Wshadow -Winit-self -Wcast-align -Wformat=2 -Wmissing-prototypes -Wstrict-overflow=2 -Wcast-qual $(CFLAGS)
 
 uname := $(shell sh -c 'uname -s 2>/dev/null || echo false')