gentoo-overlay/app-emulation/virtualbox-guest-additions/files/vboxguest-6.0.6-log-use-c99.patch

https://bugs.gentoo.org/298988

--- a/vboxguest/Makefile
+++ b/vboxguest/Makefile
@@ -136,7 +136,7 @@
 	IN_MODULE \
 	RT_WITH_VBOX \
 	VBGL_VBOXGUEST \
-	VBOX_WITH_HGCM
+	VBOX_WITH_HGCM LOG_USE_C99
 ifeq ($(BUILD_TARGET_ARCH),amd64)
 VBOXMOD_DEFS += VBOX_WITH_64_BITS_GUESTS
 endif