diff --git a/backends/imgui_impl_dx12.cpp b/backends/imgui_impl_dx12.cpp
index 67e2763c2..a97723adb 100644
--- a/backends/imgui_impl_dx12.cpp
+++ b/backends/imgui_impl_dx12.cpp
@@ -1215,7 +1215,7 @@ static void ImGui_ImplDX12_RenderWindow(ImGuiViewport* viewport, void*)
     cmd_list->ResourceBarrier(1, &barrier);
     cmd_list->OMSetRenderTargets(1, &vd->FrameCtx[back_buffer_idx].RenderTargetCpuDescriptors, FALSE, nullptr);
     if (!(viewport->Flags & ImGuiViewportFlags_NoRendererClear))
-        cmd_list->ClearRenderTargetView(vd->FrameCtx[back_buffer_idx].RenderTargetCpuDescriptors, (float*)&clear_color, 0, nullptr);
+        cmd_list->ClearRenderTargetView(vd->FrameCtx[back_buffer_idx].RenderTargetCpuDescriptors, (const float*)&clear_color, 0, nullptr);
     cmd_list->SetDescriptorHeaps(1, &bd->pd3dSrvDescHeap);
 
     ImGui_ImplDX12_RenderDrawData(viewport->DrawData, cmd_list);
diff --git a/backends/imgui_impl_dx9.cpp b/backends/imgui_impl_dx9.cpp
index f8725cb24..ed7a88685 100644
--- a/backends/imgui_impl_dx9.cpp
+++ b/backends/imgui_impl_dx9.cpp
@@ -391,7 +391,7 @@ static void ImGui_ImplDX9_CopyTextureRegion(bool tex_use_colors, const ImU32* sr
 #endif
     for (int y = 0; y < h; y++)
     {
-        const ImU32* src_p = (const ImU32*)(void*)((const unsigned char*)src + src_pitch * y);
+        const ImU32* src_p = (const ImU32*)(const void*)((const unsigned char*)src + src_pitch * y);
         ImU32* dst_p = (ImU32*)(void*)((unsigned char*)dst + dst_pitch * y);
         if (convert_rgba_to_bgra)
             for (int x = w; x > 0; x--, src_p++, dst_p++) // Convert copy
diff --git a/backends/imgui_impl_glfw.cpp b/backends/imgui_impl_glfw.cpp
index 32452e7ba..1ffc36bf9 100644
--- a/backends/imgui_impl_glfw.cpp
+++ b/backends/imgui_impl_glfw.cpp
@@ -107,6 +107,8 @@
 #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
+#elif defined(__GNUC__)
+#pragma GCC diagnostic ignored "-Wfloat-equal"          // warning: comparing floating-point with '==' or '!=' is unsafe
 #endif
 
 // GLFW
@@ -1331,7 +1333,7 @@ static ImVec2 ImGui_ImplGlfw_GetWindowSize(ImGuiViewport* viewport)
 static void ImGui_ImplGlfw_SetWindowSize(ImGuiViewport* viewport, ImVec2 size)
 {
     ImGui_ImplGlfw_ViewportData* vd = (ImGui_ImplGlfw_ViewportData*)viewport->PlatformUserData;
-#if __APPLE__ && !GLFW_HAS_OSX_WINDOW_POS_FIX
+#if defined(__APPLE__) && !GLFW_HAS_OSX_WINDOW_POS_FIX
     // Native OS windows are positioned from the bottom-left corner on macOS, whereas on other platforms they are
     // positioned from the upper-left corner. GLFW makes an effort to convert macOS style coordinates, however it
     // doesn't handle it when changing size. We are manually moving the window in order for changes of size to be based
diff --git a/backends/imgui_impl_sdl2.cpp b/backends/imgui_impl_sdl2.cpp
index 5b6979953..b2ff04174 100644
--- a/backends/imgui_impl_sdl2.cpp
+++ b/backends/imgui_impl_sdl2.cpp
@@ -1127,7 +1127,7 @@ static void ImGui_ImplSDL2_DestroyWindow(ImGuiViewport* viewport)
 static void ImGui_ImplSDL2_ShowWindow(ImGuiViewport* viewport)
 {
     ImGui_ImplSDL2_ViewportData* vd = (ImGui_ImplSDL2_ViewportData*)viewport->PlatformUserData;
-#if defined(_WIN32) && !(defined(WINAPI_FAMILY) && (WINAPI_FAMILY == WINAPI_FAMILY_APP || WINAPI_FAMILY == WINAPI_FAMILY_GAMES))
+#if defined(_WIN32) && !(defined(WINAPI_FAMILY) && ((defined(WINAPI_FAMILY_APP) && WINAPI_FAMILY == WINAPI_FAMILY_APP) || (defined(WINAPI_FAMILY_GAMES) && WINAPI_FAMILY == WINAPI_FAMILY_GAMES)))
     HWND hwnd = (HWND)viewport->PlatformHandleRaw;
 
     // SDL hack: Hide icon from task bar
diff --git a/backends/imgui_impl_sdl3.cpp b/backends/imgui_impl_sdl3.cpp
index 4c82fe6c9..7b8ee9331 100644
--- a/backends/imgui_impl_sdl3.cpp
+++ b/backends/imgui_impl_sdl3.cpp
@@ -1063,7 +1063,7 @@ static void ImGui_ImplSDL3_DestroyWindow(ImGuiViewport* viewport)
 static void ImGui_ImplSDL3_ShowWindow(ImGuiViewport* viewport)
 {
     ImGui_ImplSDL3_ViewportData* vd = (ImGui_ImplSDL3_ViewportData*)viewport->PlatformUserData;
-#if defined(_WIN32) && !(defined(WINAPI_FAMILY) && (WINAPI_FAMILY == WINAPI_FAMILY_APP || WINAPI_FAMILY == WINAPI_FAMILY_GAMES))
+#if defined(_WIN32) && !(defined(WINAPI_FAMILY) && ((defined(WINAPI_FAMILY_APP) && WINAPI_FAMILY == WINAPI_FAMILY_APP) || (defined(WINAPI_FAMILY_GAMES) && WINAPI_FAMILY == WINAPI_FAMILY_GAMES)))
     HWND hwnd = (HWND)viewport->PlatformHandleRaw;
 
     // SDL hack: Show icon in task bar (#7989)
@@ -1193,7 +1193,7 @@ static int ImGui_ImplSDL3_CreateVkSurface(ImGuiViewport* viewport, ImU64 vk_inst
 {
     ImGui_ImplSDL3_ViewportData* vd = (ImGui_ImplSDL3_ViewportData*)viewport->PlatformUserData;
     (void)vk_allocator;
-    bool ret = SDL_Vulkan_CreateSurface(vd->Window, (VkInstance)vk_instance, (VkAllocationCallbacks*)vk_allocator, (VkSurfaceKHR*)out_vk_surface);
+    bool ret = SDL_Vulkan_CreateSurface(vd->Window, (VkInstance)vk_instance, (const VkAllocationCallbacks*)vk_allocator, (VkSurfaceKHR*)out_vk_surface);
     return ret ? 0 : 1; // ret ? VK_SUCCESS : VK_NOT_READY
 }
 
diff --git a/imgui.cpp b/imgui.cpp
index 87dd34b5a..f6e48ec85 100644
--- a/imgui.cpp
+++ b/imgui.cpp
@@ -17623,7 +17623,7 @@ static void ImGui::DockContextPruneUnusedSettingsNodes(ImGuiContext* ctx)
     {
         ImGuiDockNodeSettings* settings = &dc->NodesSettings[settings_n];
         ImGuiDockContextPruneNodeData* data = pool.GetByKey(settings->ID);
-        if (data->CountWindows > 1)
+        if (data == NULL || data->CountWindows > 1)
             continue;
         ImGuiDockContextPruneNodeData* data_root = (data->RootId == settings->ID) ? data : pool.GetByKey(data->RootId);