Forcibly disable hidden dep on Wayland.

The upstream knob to turn it off doesn't work, so Wayland is used
unconditionally if installed, necessitating patching the knob.

Even if it weren't junked during the build, making Wayland a dependency
of this port is not an option right now, as it requires SDL2 to have
been built with Wayland support.

Build breakage reported by ajacoutot@

emulators/ppsspp/Makefile

@@ -5,6 +5,7 @@ COMMENT =	Sony PlayStation Portable emulator
 
 DISTNAME =	ppsspp-$V
 V =		1.16.1
+REVISION =	0
 
 SITES =		https://github.com/hrydgard/ppsspp/releases/download/v$V/
 
@@ -37,11 +38,13 @@ LIB_DEPENDS =		archivers/snappy \
 
 COMPILER =		base-clang ports-gcc
 
+# Wayland not yet supported in sdl2
 CONFIGURE_ARGS =	-DUSE_SYSTEM_FFMPEG=ON \
 			-DUSE_SYSTEM_LIBZIP=ON \
 			-DUSE_SYSTEM_SNAPPY=ON \
 			-DUSE_SYSTEM_ZSTD=ON \
 			-DUSE_DISCORD=OFF \
+			-DUSE_WAYLAND_WSI=OFF \
 			-DUSING_EGL=OFF
 
 DEBUG_PACKAGES = ${BUILD_PACKAGES}

emulators/ppsspp/patches/patch-CMakeLists_txt

@@ -1,10 +1,23 @@
 - Honor CFLAGS and DEBUG
 - Use system libpng on arm platforms
+- Allow disabling Wayland even if found
 
 Index: CMakeLists.txt
 --- CMakeLists.txt.orig
 +++ CMakeLists.txt
-@@ -378,13 +378,13 @@ if(NOT MSVC)
+@@ -188,10 +188,9 @@ if(UNIX AND NOT (APPLE OR ANDROID) AND VULKAN)
+ 	find_package(Wayland)
+ 	if(NOT WAYLAND_FOUND)
+ 		message(STATUS "Could not find Wayland libraries, disabling Wayland WSI support for Vulkan.")
+-	else()
++	elseif(USE_WAYLAND_WSI)
+ 		include_directories(${WAYLAND_INCLUDE_DIR})
+ 		add_definitions(-DVK_USE_PLATFORM_WAYLAND_KHR)
+-		add_definitions(-DUSE_WAYLAND_WSI=ON)
+ 	endif()
+ 
+ 	if(USE_VULKAN_DISPLAY_KHR)
+@@ -378,13 +377,13 @@ if(NOT MSVC)
  		endif()
  	endif()
  
@@ -22,7 +35,7 @@ Index: CMakeLists.txt
  	set(CMAKE_C_FLAGS_RELWITHDEBINFO "${CMAKE_C_FLAGS_RELWITHDEBINFO} -O2 -g -D_NDEBUG")
  
  	# Enable checking printf-like format strings (also works for logging functions)
-@@ -1125,7 +1125,7 @@ else()
+@@ -1125,7 +1124,7 @@ else()
  endif()
  
  # Arm platforms require at least libpng17.