# git rev-parse -q --verify 4ee812f6143d78d8ba1399671d78c8d78bf2817c^{commit}
4ee812f6143d78d8ba1399671d78c8d78bf2817c
already have revision, skipping fetch
# git checkout -q -f -B kisskb 4ee812f6143d78d8ba1399671d78c8d78bf2817c
# git clean -qxdf
# < git log -1
# commit 4ee812f6143d78d8ba1399671d78c8d78bf2817c
# Author: Michael Ellerman <mpe@ellerman.id.au>
# Date:   Wed Nov 20 22:27:38 2019 +1100
# 
#     crypto: vmx - Avoid weird build failures
#     
#     In the vmx crypto Makefile we assign to a variable called TARGET and
#     pass that to the aesp8-ppc.pl and ghashp8-ppc.pl scripts.
#     
#     The variable is meant to describe what flavour of powerpc we're
#     building for, eg. either 32 or 64-bit, and big or little endian.
#     
#     Unfortunately TARGET is a fairly common name for a make variable, and
#     if it happens that TARGET is specified as a command line parameter to
#     make, the value specified on the command line will override our value.
#     
#     In particular this can happen if the kernel Makefile is driven by an
#     external Makefile that uses TARGET for something.
#     
#     This leads to weird build failures, eg:
#       nonsense  at /build/linux/drivers/crypto/vmx/ghashp8-ppc.pl line 45.
#       /linux/drivers/crypto/vmx/Makefile:20: recipe for target 'drivers/crypto/vmx/ghashp8-ppc.S' failed
#     
#     Which shows that we passed an empty value for $(TARGET) to the perl
#     script, confirmed with make V=1:
#     
#       perl /linux/drivers/crypto/vmx/ghashp8-ppc.pl  > drivers/crypto/vmx/ghashp8-ppc.S
#     
#     We can avoid this confusion by using override, to tell make that we
#     don't want anything to override our variable, even a value specified
#     on the command line. We can also use a less common name, given the
#     script calls it "flavour", let's use that.
#     
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
#     Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
# < /opt/cross/kisskb/korg/gcc-8.1.0-nolibc/x86_64-linux/bin/x86_64-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-8.1.0-nolibc/x86_64-linux/bin/x86_64-linux-ld --version
# < git log --format=%s --max-count=1 4ee812f6143d78d8ba1399671d78c8d78bf2817c
# < make -s -j 10 ARCH=x86_64 O=/kisskb/build/crypto_x86_64-allnoconfig_x86_64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/x86_64-linux/bin/x86_64-linux-  allnoconfig
# make -s -j 10 ARCH=x86_64 O=/kisskb/build/crypto_x86_64-allnoconfig_x86_64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/x86_64-linux/bin/x86_64-linux-  
/kisskb/src/tools/objtool
Completed OK
# rm -rf /kisskb/build/crypto_x86_64-allnoconfig_x86_64-gcc8
# Build took: 0:00:21.948697