Compile fails because wayland-client.h cannot be found

[jagot]

Apologies if this should be an issue instead.

Slightly related to: #8969

If I try to compile ImGui with the GLFW backend on a Linux machine that does not have Wayland or any of its headers installed, the compile fails since ImGui insists on defining GLFW_EXPOSE_NATIVE_WAYLAND before including GLFW/glfw3native.h.

If I comment out

imgui/backends/imgui_impl_glfw.cpp

Lines 129 to 131 in e11b7a0

	#ifndef GLFW_EXPOSE_NATIVE_WAYLAND
	#define GLFW_EXPOSE_NATIVE_WAYLAND
	#endif

GLFW picks up the X11 headers instead and the compile is successful.

[ocornut]

Moving to #9024. This should only be an issue indeed, it's not a user's build-setup issue but rather an issue triggered by recent changes.