# git rev-parse -q --verify 316346243be6df12799c0b64b788e06bad97c30b^{commit}
316346243be6df12799c0b64b788e06bad97c30b
already have revision, skipping fetch
# git checkout -q -f -B kisskb 316346243be6df12799c0b64b788e06bad97c30b
# git clean -qxdf
# < git log -1
# commit 316346243be6df12799c0b64b788e06bad97c30b
# Merge: a69ae291e1cc df26327ea097
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Mon Sep 13 10:43:04 2021 -0700
# 
#     Merge branch 'gcc-min-version-5.1' (make gcc-5.1 the minimum version)
#     
#     Merge patch series from Nick Desaulniers to update the minimum gcc
#     version to 5.1.
#     
#     This is some of the left-overs from the merge window that I didn't want
#     to deal with yesterday, so it comes in after -rc1 but was sent before.
#     
#     Gcc-4.9 support has been an annoyance for some time, and with -Werror I
#     had the choice of applying a fairly big patch from Kees Cook to remove a
#     fair number of initializer warnings (still leaving some), or this patch
#     series from Nick that just removes the source of the problem.
#     
#     The initializer cleanups might still be worth it regardless, but
#     honestly, I preferred just tackling the problem with gcc-4.9 head-on.
#     We've been more aggressiuve about no longer having to care about
#     compilers that were released a long time ago, and I think it's been a
#     good thing.
#     
#     I added a couple of patches on top to sort out a few left-overs now that
#     we no longer support gcc-4.x.
#     
#     As noted by Arnd, as a result of this minimum compiler version upgrade
#     we can probably change our use of '--std=gnu89' to '--std=gnu11', and
#     finally start using local loop declarations etc.  But this series does
#     _not_ yet do that.
#     
#     Link: https://lore.kernel.org/all/20210909182525.372ee687@canb.auug.org.au/
#     Link: https://lore.kernel.org/lkml/CAK7LNASs6dvU6D3jL2GG3jW58fXfaj6VNOe55NJnTB8UPuk2pA@mail.gmail.com/
#     Link: https://github.com/ClangBuiltLinux/linux/issues/1438
#     
#     * emailed patches from Nick Desaulniers <ndesaulniers@google.com>:
#       Drop some straggling mentions of gcc-4.9 as being stale
#       compiler_attributes.h: drop __has_attribute() support for gcc4
#       vmlinux.lds.h: remove old check for GCC 4.9
#       compiler-gcc.h: drop checks for older GCC versions
#       Makefile: drop GCC < 5 -fno-var-tracking-assignments workaround
#       arm64: remove GCC version check for ARCH_SUPPORTS_INT128
#       powerpc: remove GCC version check for UPD_CONSTR
#       riscv: remove Kconfig check for GCC version for ARCH_RV64I
#       Kconfig.debug: drop GCC 5+ version check for DWARF5
#       mm/ksm: remove old GCC 4.9+ check
#       compiler.h: drop fallback overflow checkers
#       Documentation: raise minimum supported version of GCC to 5.1
# < /opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux-ld --version
# < git log --format=%s --max-count=1 316346243be6df12799c0b64b788e06bad97c30b
# < make -s -j 32 ARCH=powerpc O=/kisskb/build/linus_powerpc-allyesconfig_powerpc-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux-  allyesconfig
***
*** Compiler is too old.
***   Your GCC version:    4.9.4
***   Minimum GCC version: 5.1.0
***
scripts/Kconfig.include:44: Sorry, this compiler is not supported.
make[2]: *** [/kisskb/src/scripts/kconfig/Makefile:77: allyesconfig] Error 1
make[1]: *** [/kisskb/src/Makefile:616: allyesconfig] Error 2
make: *** [Makefile:219: __sub-make] Error 2
Command 'make -s -j 32 ARCH=powerpc O=/kisskb/build/linus_powerpc-allyesconfig_powerpc-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux-  allyesconfig' returned non-zero exit status 2
# rm -rf /kisskb/build/linus_powerpc-allyesconfig_powerpc-gcc4.9
# Build took: 0:00:01.018205