Using -Oline -j 96 W=1 redirect to /tmp/tmp.BYc6YH6Uku and /tmp/tmp.oKiK44f0wS
LLVM=1 cc="ccache clang"
clang version 21.1.8 (Fedora 21.1.8-4.fc43)
Tree base:
0f394c69562a ("inet: add dst4_mtu() and dst6_mtu() helpers")
Skip baseline build, not the first patch and no Kconfig updates
Building the tree before the patch
make[1]: Entering directory '/srv/nipa-poller/net-next/wt-0/build_clang'
  GEN     Makefile
#
# configuration written to .config
#
make[1]: Leaving directory '/srv/nipa-poller/net-next/wt-0/build_clang'
  SYNC    include/config/auto.conf
  GEN     Makefile
  GEN     Makefile
  DESCEND objtool
  CALL    ../scripts/checksyscalls.sh
  INSTALL libsubcmd_headers
  CC [M]  net/ipv6/ip6_output.o
  CC [M]  net/ipv6/route.o
  CC [M]  net/ipv6/ipv6_sockglue.o
  CC [M]  net/ipv6/tcp_ipv6.o
  CC [M]  net/ipv6/ip6_tunnel.o
  CC [M]  net/ipv6/ip6_gre.o
  LD [M]  net/ipv6/ipv6.o
  MODPOST Module.symvers
Kernel: arch/x86/boot/bzImage is ready  (#2000)
  LD [M]  net/ipv6/ipv6.ko
  LD [M]  net/ipv6/ip6_tunnel.ko
  LD [M]  net/ipv6/ip6_gre.ko
Building the tree with the patch
make[1]: Entering directory '/srv/nipa-poller/net-next/wt-0/build_clang'
  GEN     Makefile
#
# configuration written to .config
#
make[1]: Leaving directory '/srv/nipa-poller/net-next/wt-0/build_clang'
  SYNC    include/config/auto.conf
  GEN     Makefile
  GEN     Makefile
  DESCEND objtool
  CALL    ../scripts/checksyscalls.sh
  INSTALL libsubcmd_headers
  CC [M]  net/ipv6/ipv6_sockglue.o
  CC [M]  net/ipv6/ip6_output.o
  CC [M]  net/ipv6/ip6_gre.o
  CC [M]  net/ipv6/ip6_tunnel.o
  CC [M]  net/ipv6/tcp_ipv6.o
  CC [M]  net/ipv6/route.o
  LD [M]  net/ipv6/ipv6.o
  MODPOST Module.symvers
Kernel: arch/x86/boot/bzImage is ready  (#2000)
  CC [M]  net/ipv6/ipv6.mod.o
  CC [M]  net/ipv6/ip6_tunnel.mod.o
  CC [M]  net/ipv6/ip6_gre.mod.o
  LD [M]  net/ipv6/ipv6.ko
  LD [M]  net/ipv6/ip6_tunnel.ko
  LD [M]  net/ipv6/ip6_gre.ko