Emerging app-emulation/docker-1.2.0 in a Docker container (which had /proc/config.gz but not /usr/src/linux) died with the following output: >>> Emerging (32 of 32) app-emulation/docker-1.2.0 * docker-1.2.0.zip SHA256 SHA512 WHIRLPOOL size ;-) ... [ ok ] * Determining the location of the kernel source code * Unable to find kernel sources at /usr/src/linux * Please make sure that /usr/src/linux points at your running kernel, * (or the kernel you wish to build against). * Alternatively, set the KERNEL_DIR environment variable to the kernel sources location * Unable to calculate Linux Kernel version for build, attempting to use running version * Could not find a usable .config in the kernel source directory. * Please ensure that /usr/src/linux points to a configured set of Linux sources. * If you are using KBUILD_OUTPUT, please set the environment var so that * it points to the necessary object directory so that it might find .config. * ERROR: app-emulation/docker-1.2.0::gentoo failed (setup phase): * Kernel not configured; no .config found in * * Call stack: * ebuild.sh, line 93: Called pkg_setup * docker-1.2.0.ebuild, line 126: Called linux-info_pkg_setup * linux-info.eclass, line 914: Called check_extra_config * linux-info.eclass, line 724: Called require_configured_kernel * linux-info.eclass, line 297: Called die * The specific snippet of code: * die "Kernel not configured; no .config found in ${KV_OUT_DIR}" The reason is that require_configured_kernel relies on linux_config_src_exists instead of the more generic linux_config_exists. It would be nice if check_extra_config and linux-info_pkg_setup supported /proc/config.gz for checking the kernel config. However, *always* falling back to /proc/config.gz might make it harder to reliably build kernel modules. For example, linux-mod.eclass uses: linux-info_pkg_setup; require_configured_kernel check_kernel_built; to verify that a kernel is available for building modules against. That's not going to work if the checks are using /proc/config.gz. Perhaps an option to linux-info_pkg_setup, which was passed down through check_extra_config to require_configured_kernel that selected between linux_config_src_exists and linux_config_exists? Reproducible: Always Steps to Reproduce: 1. docker run --rm -it wking/gentoo-portage:20141023 /bin/bash 2. echo 'app-emulation/docker ~amd64' > /etc/portage/package.accept_keywords 3. emerge -v app-emulation/docker Actual Results: The crash shown above. Expected Results: A successfully installed Docker. I can attach the emerge --info if you want, but the image is just stage3-amd64-20141023.tar.bz2 with a Portage tree from the same day.
My system don't have /usr/src/linux since I use my own way to build linux kernel. Emerging fails for dev-lang/mono: fpemud-workstation / # USE=minimal emerge -1 mono Calculating dependencies... done! >>> Verifying ebuild manifests >>> Running pre-merge checks for dev-lang/mono-4.2.3.4 * Determining the location of the kernel source code * Found kernel source directory: * /usr/src/linux * Could not find a Makefile in the kernel source directory. * Please ensure that /usr/src/linux points to a complete set of Linux sources * Unable to calculate Linux Kernel version for build, attempting to use running version * Could not find a usable .config in the kernel source directory. * Please ensure that /usr/src/linux points to a configured set of Linux sources. * If you are using KBUILD_OUTPUT, please set the environment var so that * it points to the necessary object directory so that it might find .config. * ERROR: dev-lang/mono-4.2.3.4::gentoo failed (pretend phase): * Kernel not configured; no .config found in * * Call stack: * ebuild.sh, line 133: Called pkg_pretend * mono-4.2.3.4.ebuild, line 44: Called check_extra_config * linux-info.eclass, line 734: Called require_configured_kernel * linux-info.eclass, line 297: Called die * The specific snippet of code: * die "Kernel not configured; no .config found in ${KV_OUT_DIR}" I don't see the reason why dev-lang/mono needs a full kernel source.
For my problem above, I modified check_extra_config() in linux-info.eclass and successfully emerges dev-lang/mono.
Created attachment 429716 [details, diff] linux-info.eclass.patch
This support is currently in the eclass. Mono compiles without any /usr/src/linux/.config and a /proc/config.gz
