Estou encontrando esses erros ao tentar compilar um novo kernel no Gentoo ...
scripts/kconfig/conf --syncconfig Kconfig
DESCEND objtool
CC kernel/bounds.s
CC arch/x86/kernel/asm-offsets.s
GEN scripts/gdb/linux/constants.py
CALL scripts/checksyscalls.sh
CC [M] arch/x86/kvm/../../../virt/kvm/kvm_main.o
CC init/main.o
CC kernel/bpf/core.o
CC arch/x86/ia32/sys_ia32.o
CC arch/x86/kernel/acpi/boot.o
CC arch/x86/events/amd/core.o
CC certs/system_keyring.o
CC arch/x86/entry/vdso/vma.o
CC arch/x86/crypto/sha1-mb/sha1_mb.o
objdump: certs/.tmp_system_keyring.o: unable to initialize decompress status for section .debug_info
objdump: certs/.tmp_system_keyring.o: unable to initialize decompress status for section .debug_info
objdump: certs/.tmp_system_keyring.o: file format not recognized
EXTRACT_CERTS
AS certs/system_certificates.o
AR certs/built-in.a
objdump: arch/x86/ia32/.tmp_sys_ia32.o: unable to initialize decompress status for section .debug_info
objdump: arch/x86/ia32/.tmp_sys_ia32.o: unable to initialize decompress status for section .debug_info
objdump: arch/x86/ia32/.tmp_sys_ia32.o: file format not recognized
objdump: arch/x86/events/amd/.tmp_core.o: unable to initialize decompress status for section .debug_info
objdump: arch/x86/events/amd/.tmp_core.o: unable to initialize decompress status for section .debug_info
objdump: arch/x86/events/amd/.tmp_core.o: file format not recognized
CC arch/x86/ia32/ia32_signal.o
CC arch/x86/mm/init.o
CC arch/x86/events/amd/uncore.o
objdump: arch/x86/entry/vdso/.tmp_vma.o: unable to initialize decompress status for section .debug_info
objdump: arch/x86/entry/vdso/.tmp_vma.o: unable to initialize decompress status for section .debug_info
objdump: arch/x86/entry/vdso/.tmp_vma.o: file format not recognized
CC arch/x86/entry/vdso/vdso32-setup.o
objdump: arch/x86/kernel/acpi/.tmp_boot.o: unable to initialize decompress status for section .debug_info
objdump: arch/x86/kernel/acpi/.tmp_boot.o: unable to initialize decompress status for section .debug_info
objdump: arch/x86/kernel/acpi/.tmp_boot.o: file format not recognized
CC arch/x86/kernel/acpi/sleep.o
AR arch/x86/crypto/sha1-mb/built-in.a
objdump: init/.tmp_main.o: unable to initialize decompress status for section .debug_info
objdump: init/.tmp_main.o: unable to initialize decompress status for section .debug_info
objdump: init/.tmp_main.o: file format not recognized
...
Eu reconstruí binutils (que é o pacote do qual o objdump vem), mas isso não teve efeito.
Eu posso compilar e instalar outros pacotes / software sem nenhum problema, mas isso está impedindo que a compilação do kernel seja concluída.
De acordo com o bug 671650 , elfutils-0.175 tem problemas com alinhamentos.
Mudar para o vinculador ld.gold revelou uma enorme quantidade de avisos sobre alinhamentos de seção.
Tente reverter para elfutils-0.173 :
# emerge dev-libs/elfutils-0.173
E então reconstrua seu kernel.
sys-kernel/gentoo-sources-4.19.3 no meu sistema é compilado e carrega bem com elfutils-0.173 .