# git rev-parse -q --verify 71c5f03154ac1cb27423b984743ccc2f5d11d14d^{commit}
71c5f03154ac1cb27423b984743ccc2f5d11d14d
already have revision, skipping fetch
# git checkout -q -f -B kisskb 71c5f03154ac1cb27423b984743ccc2f5d11d14d
# git clean -qxdf
# < git log -1
# commit 71c5f03154ac1cb27423b984743ccc2f5d11d14d
# Merge: 555a6e8c11e6 c635b0cea6b8
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Thu Dec 24 14:20:33 2020 -0800
# 
#     Merge tag 'docs-5.11-2' of git://git.lwn.net/linux
#     
#     Pull documentation fixes from Jonathan Corbet:
#      "A small set of late-arriving, small documentation fixes"
#     
#     * tag 'docs-5.11-2' of git://git.lwn.net/linux:
#       docs: admin-guide: Fix default value of max_map_count in sysctl/vm.rst
#       Documentation/submitting-patches: Document the SoB chain
#       Documentation: process: Correct numbering
#       docs: submitting-patches: Trivial - fix grammatical error
# < /opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux-gcc --version
# < /opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux-ld --version
# < git log --format=%s --max-count=1 71c5f03154ac1cb27423b984743ccc2f5d11d14d
# < make -s -j 8 ARCH=um O=/kisskb/build/linus_um-allmodconfig_um-x86_64 CROSS_COMPILE=/opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux- SUBARCH=x86_64 allmodconfig
# Added to kconfig CONFIG_STANDALONE=y
# Added to kconfig CONFIG_KCOV=n
# Added to kconfig CONFIG_GCC_PLUGINS=n
# Added to kconfig CONFIG_GCC_PLUGIN_CYC_COMPLEXITY=n
# Added to kconfig CONFIG_GCC_PLUGIN_SANCOV=n
# Added to kconfig CONFIG_GCC_PLUGIN_LATENT_ENTROPY=n
# Added to kconfig CONFIG_GCC_PLUGIN_STRUCTLEAK=n
# Added to kconfig CONFIG_GCC_PLUGIN_RANDSTRUCT=n
# Added to kconfig CONFIG_UML_NET=n
# Added to kconfig CONFIG_UML_NET_ETHERTAP=n
# Added to kconfig CONFIG_UML_NET_TUNTAP=n
# Added to kconfig CONFIG_UML_NET_SLIP=n
# Added to kconfig CONFIG_UML_NET_DAEMON=n
# Added to kconfig CONFIG_UML_NET_VDE=n
# Added to kconfig CONFIG_UML_NET_MCAST=n
# Added to kconfig CONFIG_UML_NET_PCAP=n
# Added to kconfig CONFIG_UML_NET_SLIRP=n
# Added to kconfig CONFIG_GCOV_KERNEL=n
# Added to kconfig CONFIG_DEBUG_INFO_BTF=n
# < make -s -j 8 ARCH=um O=/kisskb/build/linus_um-allmodconfig_um-x86_64 CROSS_COMPILE=/opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux- SUBARCH=x86_64 help
# make -s -j 8 ARCH=um O=/kisskb/build/linus_um-allmodconfig_um-x86_64 CROSS_COMPILE=/opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux- SUBARCH=x86_64 olddefconfig
.config:4501:warning: override: reassigning to symbol GCC_PLUGIN_CYC_COMPLEXITY
.config:4503:warning: override: reassigning to symbol GCC_PLUGIN_LATENT_ENTROPY
.config:4507:warning: override: reassigning to symbol UML_NET_ETHERTAP
.config:4509:warning: override: reassigning to symbol UML_NET_SLIP
.config:4512:warning: override: reassigning to symbol UML_NET_MCAST
.config:4514:warning: override: reassigning to symbol UML_NET_SLIRP
# make -s -j 8 ARCH=um O=/kisskb/build/linus_um-allmodconfig_um-x86_64 CROSS_COMPILE=/opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux- SUBARCH=x86_64 

Auto-detecting system features:
...                        libelf: [ OFF ]
...                          zlib: [ OFF ]
...                           bpf: [ on  ]

No libelf found
make[5]: *** [Makefile:287: elfdep] Error 1
make[4]: *** [/kisskb/src/kernel/bpf/preload/Makefile:8: kernel/bpf/preload/libbpf.a] Error 2
make[3]: *** [/kisskb/src/scripts/Makefile.build:496: kernel/bpf/preload] Error 2
make[3]: *** Waiting for unfinished jobs....
make[2]: *** [/kisskb/src/scripts/Makefile.build:496: kernel/bpf] Error 2
make[2]: *** Waiting for unfinished jobs....
make[1]: *** [/kisskb/src/Makefile:1805: kernel] Error 2
make[1]: *** Waiting for unfinished jobs....
make: *** [Makefile:185: __sub-make] Error 2
Command 'make -s -j 8 ARCH=um O=/kisskb/build/linus_um-allmodconfig_um-x86_64 CROSS_COMPILE=/opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux- SUBARCH=x86_64 ' returned non-zero exit status 2
# rm -rf /kisskb/build/linus_um-allmodconfig_um-x86_64
# Build took: 0:03:04.924734