From 4ce188def8af61acce1aef5c2bca0481888326b8 Mon Sep 17 00:00:00 2001
From: JD31 <jerome.desfieux@gmail.com>
Date: Wed, 7 Jan 2026 16:37:59 +0100
Subject: [PATCH] Backends: WebGPU: clarify build failure when attempting to
 build with Dawn for iOS. (#9155, #9156)

---
 backends/imgui_impl_wgpu.cpp | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/backends/imgui_impl_wgpu.cpp b/backends/imgui_impl_wgpu.cpp
index 47c31726b..c8722cd4a 100644
--- a/backends/imgui_impl_wgpu.cpp
+++ b/backends/imgui_impl_wgpu.cpp
@@ -1020,15 +1020,18 @@ void ImGui_ImplWGPU_DebugPrintAdapterInfo(const WGPUAdapter& adapter)
 #if defined(__APPLE__)
 // MacOS specific: is necessary to compile with "-x objective-c++" flags
 // (e.g. using cmake: set_source_files_properties(${IMGUI_DIR}/backends/imgui_impl_wgpu.cpp PROPERTIES COMPILE_FLAGS "-x objective-c++") )
+#include <TargetConditionals.h>
+#if TARGET_OS_OSX
 #include <Cocoa/Cocoa.h>
 #include <QuartzCore/CAMetalLayer.h>
 #endif
+#endif
 
 WGPUSurface ImGui_ImplWGPU_CreateWGPUSurfaceHelper(ImGui_ImplWGPU_CreateSurfaceInfo* info)
 {
     WGPUSurfaceDescriptor surface_descriptor = {};
     WGPUSurface surface = {};
-#if defined(__APPLE__)
+#if defined(__APPLE__) && TARGET_OS_OSX
     if (strcmp(info->System, "cocoa") == 0)
     {
         IM_ASSERT(info->RawWindow != nullptr);
@@ -1075,7 +1078,7 @@ WGPUSurface ImGui_ImplWGPU_CreateWGPUSurfaceHelper(ImGui_ImplWGPU_CreateSurfaceI
         surface = wgpuInstanceCreateSurface(info->Instance, &surface_descriptor);
     }
 #else
-#error "Unsupported WebGPU native platform!"
+    fprintf(stderr, "'CreateWGPUSurfaceHelper' is not implemented for this platform\n");
 #endif
     return surface;
 }