Re: [PATCH dwarves 0/2] dwarf_loader: improve cus__merging_cu()

[Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>]

Em Tue, Apr 06, 2021 at 02:03:41PM -0300, Arnaldo Carvalho de Melo escreveu:
> Sorry, I forgot to use clang on this no-lto build... doing it now with:
> 
> [acme@five bpf]$ grep LTO ../build/bpf_clang_no_lto/.config
> CONFIG_ARCH_SUPPORTS_LTO_CLANG=y
> CONFIG_ARCH_SUPPORTS_LTO_CLANG_THIN=y
> CONFIG_HAS_LTO_CLANG=y
> CONFIG_LTO_NONE=y
> # CONFIG_LTO_CLANG_FULL is not set
> # CONFIG_LTO_CLANG_THIN is not set
> CONFIG_HID_WALTOP=m
> [acme@five bpf]$
> [acme@five bpf]$ make -j28 LLVM=1 LLVM_IAS=1 O=../build/bpf_clang_no_lto/ vmlinux


Works:

[acme@five bpf]$ make -j28 LLVM=1 LLVM_IAS=1 O=../build/bpf_clang_no_lto/ vmlinux
  CC      drivers/acpi/acpica/utxfmutex.o
  AR      fs/built-in.a
  AR      drivers/acpi/acpica/built-in.a
  AR      drivers/acpi/built-in.a
  AR      drivers/md/built-in.a
  AR      drivers/built-in.a
  GEN     .version
  CHK     include/generated/compile.h
  LD      vmlinux.o
  MODPOST vmlinux.symvers
  MODINFO modules.builtin.modinfo
  GEN     modules.builtin
  LD      .tmp_vmlinux.btf
  BTF     .btf.vmlinux.bin.o
  LD      .tmp_vmlinux.kallsyms1
  KSYMS   .tmp_vmlinux.kallsyms1.S
  AS      .tmp_vmlinux.kallsyms1.S
  LD      .tmp_vmlinux.kallsyms2
  KSYMS   .tmp_vmlinux.kallsyms2.S
  AS      .tmp_vmlinux.kallsyms2.S
  LD      vmlinux
  BTFIDS  vmlinux
  SORTTAB vmlinux
  SYSMAP  System.map
make[1]: Leaving directory '/home/acme/git/build/bpf_clang_no_lto'
[acme@five bpf]$ grep LTO ../build/bpf_clang_thin_lto/.config
CONFIG_LTO=y
CONFIG_LTO_CLANG=y
CONFIG_ARCH_SUPPORTS_LTO_CLANG=y
CONFIG_ARCH_SUPPORTS_LTO_CLANG_THIN=y
CONFIG_HAS_LTO_CLANG=y
# CONFIG_LTO_NONE is not set
# CONFIG_LTO_CLANG_FULL is not set
CONFIG_LTO_CLANG_THIN=y
CONFIG_HID_WALTOP=m
[acme@five bpf]$