Revbump mesa-19.2.0_rc1 to r2 (add rpi-v3d USE)

Now controlling the v3d switch by explicit USE

Author: sakaki-

media-libs/mesa/mesa-19.2.0_rc1-r1.ebuild renamed to media-libs/mesa/mesa-19.2.0_rc1-r2.ebuild

@@ -36,7 +36,7 @@ done
 
 IUSE="${IUSE_VIDEO_CARDS}
 	+classic d3d9 debug +dri3 +egl +gallium +gbm gles1 +gles2 +libglvnd +llvm
-	lm_sensors opencl osmesa pax_kernel selinux test unwind vaapi valgrind
+	lm_sensors opencl osmesa pax_kernel rpi-v3d selinux test unwind vaapi valgrind
 	vdpau vulkan vulkan-overlay wayland +X xa xvmc"
 
 REQUIRED_USE="
@@ -69,6 +69,7 @@ REQUIRED_USE="
 	video_cards_vmware? ( gallium )
 	xa? ( X )
 	xvmc? ( X )
+	rpi-v3d? ( arm64 video_cards_vc4 )
 "
 
 LIBDRM_DEPSTRING=">=x11-libs/libdrm-2.4.99"
@@ -420,7 +421,7 @@ multilib_src_configure() {
 		gallium_enable video_cards_panfrost panfrost
 		gallium_enable video_cards_vc4 vc4
 		# enable for Pi4 also
-		use arm64 && gallium_enable video_cards_vc4 v3d
+		use rpi-v3d && gallium_enable video_cards_vc4 v3d
 		gallium_enable video_cards_vivante etnaviv
 		gallium_enable video_cards_vmware svga
 		gallium_enable video_cards_nouveau nouveau

media-libs/mesa/metadata.xml

@@ -20,6 +20,7 @@
 		<flag name="osmesa">Build the Mesa library for off-screen rendering.</flag>
 		<flag name="pax_kernel">Enable if the user plans to run the package under a pax enabled hardened kernel</flag>
 		<flag name="pic">disable optimized assembly code that is not PIC friendly</flag>
+                <flag name="rpi-v3d">Enable V3D for the RPi4 (requires video_cards_vc4)</flag>
 		<flag name="valgrind">Compile in valgrind memory hints</flag>
 		<flag name="vdpau">Enable the VDPAU acceleration interface for the Gallium3D Video Layer.</flag>
 		<flag name="vulkan">Enable Vulkan drivers</flag>