Created attachment 458836 [details] genkernel --virtio all output Like the title says, it appears to me that genkernel doesn't know how to handle a "new" virtio option and so just aborts. (I put "new" in quotes because I've been seeing this for a while, but have been working around it.) The kernel is gentoo-sources-4.4.26, no USE flags enabled. Genkernel version is 3.4.52.4-r2. This has been a thing in significantly older versions of both, though. If I am interpreting the attached log correctly (and I may not be), configuration generation is hitting the "VIRTIO_PCI_LEGACY" option, which it doesn't know about, and elects to just give up. Compiling works fine without --virtio. Likewise, it errors out in the same way with and without --clean and --mrproper. If I do menuconfig and set the options manually everything is happy, but that rather defeats the purpose of genkernel. Assuming this is valid and not a mistake on my part, it seems likely to be related to bug 492260.
Already fixed in newer genkernel, awaiting stabilization
