Using -Oline -j 72 W=1 redirect to /tmp/tmp.j21nE5xX7o and /tmp/tmp.WfdD73PpD3
LLVM=1 cc=clang
clang version 18.1.6 (Fedora 18.1.6-3.fc40)
Tree base:
2c43c560ce64 ("net: stmmac: dwmac4: convert sgmii/rgmii "pcs" to phylink")
Skip baseline build, not the first patch
Building the tree before the patch
make[1]: Entering directory '/home/nipa/net-next/wt-0/build_clang'
  GEN     Makefile
#
# configuration written to .config
#
make[1]: Leaving directory '/home/nipa/net-next/wt-0/build_clang'
  SYNC    include/config/auto.conf
  GEN     Makefile
  GEN     Makefile
mkdir -p /home/nipa/net-next/wt-0/build_clang/tools/objtool && make O=/home/nipa/net-next/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 [M]  drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.o
  CC [M]  drivers/net/ethernet/stmicro/stmmac/dwmac4_core.o
  CC [M]  drivers/net/ethernet/stmicro/stmmac/stmmac_main.o
Building the tree with the patch
make[1]: Entering directory '/home/nipa/net-next/wt-0/build_clang'
  GEN     Makefile
#
# configuration written to .config
#
make[1]: Leaving directory '/home/nipa/net-next/wt-0/build_clang'
  SYNC    include/config/auto.conf
  GEN     Makefile
  GEN     Makefile
mkdir -p /home/nipa/net-next/wt-0/build_clang/tools/objtool && make O=/home/nipa/net-next/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 [M]  drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.o
  CC [M]  drivers/net/ethernet/stmicro/stmmac/stmmac_main.o
  CC [M]  drivers/net/ethernet/stmicro/stmmac/dwmac4_core.o