Using -Oline -j 72 W=1 redirect to /tmp/tmp.pbkJrxEPn8 and /tmp/tmp.qaNUVeCBhK
LLVM=1 cc=clang
clang version 18.1.1 (Fedora 18.1.1-1.fc40)
Tree base:
143492fce361 ("Merge branch '40GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/net-queue")
Baseline building the tree
make[1]: Entering directory '/home/nipa/bpf/wt-0/build_clang'
  GEN     Makefile
#
# configuration written to .config
#
make[1]: Leaving directory '/home/nipa/bpf/wt-0/build_clang'
  SYNC    include/config/auto.conf
  GEN     Makefile
  GEN     Makefile
mkdir -p /home/nipa/bpf/wt-0/build_clang/tools/objtool && make O=/home/nipa/bpf/wt-0/build_clang subdir=tools/objtool --no-print-directory -C objtool 
  INSTALL libsubcmd_headers
  CALL    ../scripts/checksyscalls.sh
  CHK     kernel/kheaders_data.tar.xz
  CC      kernel/bpf/arena.o
  AR      kernel/bpf/built-in.a
  AR      kernel/built-in.a
  CC [M]  drivers/net/fjes/fjes_trace.o
Building the tree before the patch
make[1]: Entering directory '/home/nipa/bpf/wt-0/build_clang'
  GEN     Makefile
#
# configuration written to .config
#
make[1]: Leaving directory '/home/nipa/bpf/wt-0/build_clang'
  SYNC    include/config/auto.conf
  GEN     Makefile
  GEN     Makefile
mkdir -p /home/nipa/bpf/wt-0/build_clang/tools/objtool && make O=/home/nipa/bpf/wt-0/build_clang subdir=tools/objtool --no-print-directory -C objtool 
  INSTALL libsubcmd_headers
  CALL    ../scripts/checksyscalls.sh
  CHK     kernel/kheaders_data.tar.xz
  CC      kernel/bpf/arena.o
  AR      kernel/bpf/built-in.a
  AR      kernel/built-in.a
  CC [M]  drivers/net/fjes/fjes_trace.o
Building the tree with the patch
make[1]: Entering directory '/home/nipa/bpf/wt-0/build_clang'
  GEN     Makefile
#
# configuration written to .config
#
make[1]: Leaving directory '/home/nipa/bpf/wt-0/build_clang'
  SYNC    include/config/auto.conf
  GEN     Makefile
  GEN     Makefile
mkdir -p /home/nipa/bpf/wt-0/build_clang/tools/objtool && make O=/home/nipa/bpf/wt-0/build_clang subdir=tools/objtool --no-print-directory -C objtool 
  INSTALL libsubcmd_headers
  CALL    ../scripts/checksyscalls.sh
  CHK     kernel/kheaders_data.tar.xz
  CC      kernel/bpf/arena.o
  AR      kernel/bpf/built-in.a
  AR      kernel/built-in.a
  CC [M]  drivers/net/fjes/fjes_trace.o