From 8a6911b8943748d639a99d5b07116961a645546b Mon Sep 17 00:00:00 2001
From: ocornut <omarcornut@gmail.com>
Date: Thu, 23 Mar 2023 18:17:45 +0100
Subject: [PATCH] Backends: Fixes zealous warnings (#5760)

---
 backends/imgui_impl_opengl2.cpp     | 11 +++++++++++
 backends/imgui_impl_opengl3.cpp     |  7 +++++--
 backends/imgui_impl_sdl2.cpp        | 10 ++++++++++
 backends/imgui_impl_sdl3.cpp        | 11 +++++++++++
 backends/imgui_impl_sdlrenderer.cpp | 10 ++++++++++
 5 files changed, 47 insertions(+), 2 deletions(-)

diff --git a/backends/imgui_impl_opengl2.cpp b/backends/imgui_impl_opengl2.cpp
index eb26307e..e833cf38 100644
--- a/backends/imgui_impl_opengl2.cpp
+++ b/backends/imgui_impl_opengl2.cpp
@@ -44,6 +44,13 @@
 #include <stdint.h>     // intptr_t
 #endif
 
+// Clang/GCC warnings with -Weverything
+#if defined(__clang__)
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wunused-macros"                      // warning: macro is not used
+#pragma clang diagnostic ignored "-Wnonportable-system-include-path"
+#endif
+
 // Include OpenGL header (without an OpenGL loader) requires a bit of fiddling
 #if defined(_WIN32) && !defined(APIENTRY)
 #define APIENTRY __stdcall                  // It is customary to use APIENTRY for OpenGL function pointer declarations on all platforms.  Additionally, the Windows OpenGL header needs APIENTRY.
@@ -285,3 +292,7 @@ void    ImGui_ImplOpenGL2_DestroyDeviceObjects()
 {
     ImGui_ImplOpenGL2_DestroyFontsTexture();
 }
+
+#if defined(__clang__)
+#pragma clang diagnostic pop
+#endif
diff --git a/backends/imgui_impl_opengl3.cpp b/backends/imgui_impl_opengl3.cpp
index 1ddeeeaf..7bf26e66 100644
--- a/backends/imgui_impl_opengl3.cpp
+++ b/backends/imgui_impl_opengl3.cpp
@@ -107,17 +107,20 @@
 #include <TargetConditionals.h>
 #endif
 
-// Clang warnings with -Weverything
+// Clang/GCC warnings with -Weverything
 #if defined(__clang__)
 #pragma clang diagnostic push
 #pragma clang diagnostic ignored "-Wold-style-cast"         // warning: use of old-style cast
 #pragma clang diagnostic ignored "-Wsign-conversion"        // warning: implicit conversion changes signedness
+#pragma clang diagnostic ignored "-Wunused-macros"          // warning: macro is not used
+#pragma clang diagnostic ignored "-Wnonportable-system-include-path"
+#pragma clang diagnostic ignored "-Wcast-function-type"     // warning: cast between incompatible function types (for loader)
 #endif
 #if defined(__GNUC__)
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wpragmas"                  // warning: unknown option after '#pragma GCC diagnostic' kind
 #pragma GCC diagnostic ignored "-Wunknown-warning-option"   // warning: unknown warning group 'xxx'
-#pragma GCC diagnostic ignored "-Wcast-function-type"       // warning: cast between incompatible function types
+#pragma GCC diagnostic ignored "-Wcast-function-type"       // warning: cast between incompatible function types (for loader)
 #endif
 
 // GL includes
diff --git a/backends/imgui_impl_sdl2.cpp b/backends/imgui_impl_sdl2.cpp
index 86be801c..478c283d 100644
--- a/backends/imgui_impl_sdl2.cpp
+++ b/backends/imgui_impl_sdl2.cpp
@@ -72,6 +72,12 @@
 #include "imgui.h"
 #include "imgui_impl_sdl2.h"
 
+// Clang warnings with -Weverything
+#if defined(__clang__)
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wimplicit-int-float-conversion"  // warning: implicit conversion from 'xxx' to 'float' may lose precision
+#endif
+
 // SDL
 #include <SDL.h>
 #include <SDL_syswm.h>
@@ -632,3 +638,7 @@ void ImGui_ImplSDL2_NewFrame()
     // Update game controllers (if enabled and available)
     ImGui_ImplSDL2_UpdateGamepads();
 }
+
+#if defined(__clang__)
+#pragma clang diagnostic pop
+#endif
diff --git a/backends/imgui_impl_sdl3.cpp b/backends/imgui_impl_sdl3.cpp
index 9362f7ed..c9e6e953 100644
--- a/backends/imgui_impl_sdl3.cpp
+++ b/backends/imgui_impl_sdl3.cpp
@@ -24,6 +24,12 @@
 #include "imgui.h"
 #include "imgui_impl_sdl3.h"
 
+// Clang warnings with -Weverything
+#if defined(__clang__)
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wimplicit-int-float-conversion"  // warning: implicit conversion from 'xxx' to 'float' may lose precision
+#endif
+
 // SDL
 #include <SDL3/SDL.h>
 #include <SDL3/SDL_syswm.h>
@@ -565,3 +571,8 @@ void ImGui_ImplSDL3_NewFrame()
     // Update game controllers (if enabled and available)
     ImGui_ImplSDL3_UpdateGamepads();
 }
+
+#if defined(__clang__)
+#pragma clang diagnostic pop
+#endif
+
diff --git a/backends/imgui_impl_sdlrenderer.cpp b/backends/imgui_impl_sdlrenderer.cpp
index b786ebd2..998a5373 100644
--- a/backends/imgui_impl_sdlrenderer.cpp
+++ b/backends/imgui_impl_sdlrenderer.cpp
@@ -31,6 +31,12 @@
 #include <stdint.h>     // intptr_t
 #endif
 
+// Clang warnings with -Weverything
+#if defined(__clang__)
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wsign-conversion"    // warning: implicit conversion changes signedness
+#endif
+
 // SDL
 #include <SDL.h>
 #if !SDL_VERSION_ATLEAST(2,0,17)
@@ -248,3 +254,7 @@ void ImGui_ImplSDLRenderer_DestroyDeviceObjects()
 {
     ImGui_ImplSDLRenderer_DestroyFontsTexture();
 }
+
+#if defined(__clang__)
+#pragma clang diagnostic pop
+#endif