Em Tue, Apr 06, 2021 at 02:07:26PM -0300, Arnaldo Carvalho de Melo escreveu: > 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 Now with FULL LTO: CC fs/mbcache.o CC fs/posix_acl.o CC fs/coredump.o CC fs/drop_caches.o CC fs/fhandle.o AR drivers/soundwire/built-in.a AR drivers/hid/built-in.a AR drivers/acpi/built-in.a AR drivers/built-in.a AR fs/built-in.a GEN .version CHK include/generated/compile.h GEN .tmp_initcalls.lds LTO vmlinux.o OBJTOOL vmlinux.o vmlinux.o: warning: objtool: aesni_gcm_init_avx_gen2()+0x12: unsupported stack pointer realignment vmlinux.o: warning: objtool: aesni_gcm_enc_update_avx_gen2()+0x12: unsupported stack pointer realignment vmlinux.o: warning: objtool: aesni_gcm_dec_update_avx_gen2()+0x12: unsupported stack pointer realignment vmlinux.o: warning: objtool: aesni_gcm_finalize_avx_gen2()+0x12: unsupported stack pointer realignment vmlinux.o: warning: objtool: aesni_gcm_init_avx_gen4()+0x12: unsupported stack pointer realignment vmlinux.o: warning: objtool: aesni_gcm_enc_update_avx_gen4()+0x12: unsupported stack pointer realignment vmlinux.o: warning: objtool: aesni_gcm_dec_update_avx_gen4()+0x12: unsupported stack pointer realignment vmlinux.o: warning: objtool: aesni_gcm_finalize_avx_gen4()+0x12: unsupported stack pointer realignment 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_full_lto' real 8m36.854s user 50m44.832s sys 4m0.946s [acme@five bpf]$ [acme@five bpf]$ cat /etc/fedora-release Fedora release 33 (Thirty Three) [acme@five bpf]$ grep LTO ../build/bpf_clang_full_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=y # CONFIG_LTO_CLANG_THIN is not set CONFIG_HID_WALTOP=m [acme@five bpf]$ Probably this will go away if I update clang/llvm? :) Will try. - Arnaldo
