What I did:
- install a minimal debian-testing
- install build-essential, dkms, linux-headers-$(uname -r)
- install virtualbox, click Devices -> Insert guest additions CD
- run
m-a prepare - mount
/dev/sr0somewhere,cdthere and./VBoxLinuxAdditions.run
What I got:
... Building the modules for kernel 5.4.0-4-amd64. Look at /var/log/vboxadd-setup.log to find out what went wrong. modprobe vboxsf failed ... What is in the log:
... test -e include/generated/autoconf.h -a -e include/config /auto.conf || ( \ echo >&2; \ echo >&2 " ERROR: Kernel configuration is invalid."; \ echo >&2 " include/generated/autoconf.h or include/config/auto.conf are missing.";\ echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ echo >&2 ; \ /bin/false) ... What I investigated:
$modprobe vboxsf modprobe: FATAL: Module vboxsf not found in directory /lib/modules/5.4.0-4-amd $lsmod | grep vboxsf <no output> $find /usr/src/linux-headers-5.4.0-4-amd64/ -name autoconf.h /usr/src/linux-headers-5.4.0-4-amd64/include/generated/autoconf.h The host OS is Ubuntu 18.
EDIT: on openbox the log looks like:
# less /var/log/vboxadd-setup.log Building the main Guest Additions module for kernel 5.4.0-4-amd64. Error building the module. Build output follows. make V=1 CONFIG_MODULE_SIG= -C /lib/modules/5.4.0-4-amd64/build M=/tmp/vbox.0 SRCROOT=/tmp/vbox.0 -j1 modules make -C /usr/src/linux-headers-5.4.0-4-amd64 -f /usr/src/linux-headers-5.4.0-4-common/Makefile modules test -e include/generated/autoconf.h -a -e include/config/auto.conf || ( \ echo >&2; \ echo >&2 " ERROR: Kernel configuration is invalid."; \ echo >&2 " include/generated/autoconf.h or include/config/auto.conf are missing.";\ echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ echo >&2 ; \ /bin/false) make -f /usr/src/linux-headers-5.4.0-4-common/scripts/Makefile.build obj=/tmp/vbox.0 single-build= need-builtin=1 need-modorder=1 gcc-9 -Wp,-MD,/tmp/vbox.0/.VBoxGuest-linux.o.d -nostdinc -isystem /usr/lib/gcc/x86_64-linux-gnu/9/include -I/usr/src/linux-headers-5.4.0-4-common/arch/x86/include -I./arch/x86/include/generated -I/usr/src/linux-headers-5.4.0-4-common/include -I./include -I/usr/src/linux-headers-5.4.0-4-common/arch/x86/include/uapi -I./arch/x86/include/generated/uapi -I/usr/src/linux-headers-5.4.0-4-common/include/uapi -I./include/generated/uapi -include /usr/src/linux-headers-5.4.0-4-common/include/linux/kconfig.h -include /usr/src/linux-headers-5.4.0-4-common/include/linux/compiler_types.h -D__KERNEL__ -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE -Werror=implicit-function-declaration -Werror=implicit-int -Wno-format-security -std=gnu89 -mno-sse -mno-mmx -mno-sse2 -mno-3dnow -mno-avx -m64 -falign-jumps=1 -falign-loops=1 -mno-80387 -mno-fp-ret-in-387 -mpreferred-stack-boundary=3 -mskip-rax-setup -mtune=generic -mno-red-zone -mcmodel=kernel -DCONFIG_X86_X32_ABI -DCONFIG_AS_CFI=1 -DCONFIG_AS_CFI_SIGNAL_FRAME=1 -DCONFIG_AS_CFI_SECTIONS=1 -DCONFIG_AS_SSSE3=1 -DCONFIG_AS_AVX=1 -DCONFIG_AS_AVX2=1 -DCONFIG_AS_AVX512=1 -DCONFIG_AS_SHA1_NI=1 -DCONFIG_AS_SHA256_NI=1 -Wno-sign-compare -fno-asynchronous-unwind-tables -mindirect-branch=thunk-extern -mindirect-branch-register -fno-jump-tables -fno-delete-null-pointer-checks -Wno-frame-address -Wno-format-truncation -Wno-format-overflow -Wno-address-of-packed-member -O2 --param=allow-store-data-races=0 -Wframe-larger-than=2048 -fstack-protector-strong -Wno-unused-but-set-variable -Wimplicit-fallthrough -Wno-unused-const-variable -fno-var-tracking-assignments -g -pg -mrecord-mcount -mfentry -DCC_USING_FENTRY -flive-patching=inline-clone -Wdeclaration-after-statement -Wvla -Wno-pointer-sign -Wno-stringop-truncation -fno-strict-overflow -fno-merge-all-constants -fmerge-constants -fno-stack-check -fconserve-stack -Werror=date-time -Werror=incompatible-pointer-types -Werror=designated-init -fmacro-prefix-map=/usr/src/linux-headers-5.4.0-4-common/= -fcf-protection=none -Wno-packed-not-aligned -Wno-declaration-after-statement -include /tmp/vbox.0/include/VBox/VBoxGuestMangling.h -fno-pie -I/usr/src/linux-headers-5.4.0-4-common/include -I/tmp/vbox.0/ -I/tmp/vbox.0/include -I/tmp/vbox.0/r0drv/linux -I/tmp/vbox.0/vboxguest/ -I/tmp/vbox.0/vboxguest/include -I/tmp/vbox.0/vboxguest/r0drv/linux -D__KERNEL__ -DMODULE -DVBOX -DRT_OS_LINUX -DIN_RING0 -DIN_RT_R0 -DIN_GUEST -DIN_GUEST_R0 -DIN_MODULE -DRT_WITH_VBOX -DVBGL_VBOXGUEST -DVBOX_WITH_HGCM -DRT_ARCH_AMD64 -DVBOX_WITH_64_BITS_GUESTS -DMODULE -DKBUILD_BASENAME='"VBoxGuest_linux"' -DKBUILD_MODNAME='"vboxguest"' -c -o /tmp/vbox.0/VBoxGuest-linux.o /tmp/vbox.0/VBoxGuest-linux.c ./tools/objtool/objtool orc generate --module --no-fp --retpoline --uaccess /tmp/vbox.0/VBoxGuest-linux.o if objdump -h /tmp/vbox.0/VBoxGuest-linux.o | grep -q __ksymtab; then gcc-9 -E -D__GENKSYMS__ -Wp,-MD,/tmp/vbox.0/.VBoxGuest-linux.o.d -nostdinc -isystem /usr/lib/gcc/x86_64-linux-gnu/9/include -I/usr/src/linux-headers-5.4.0-4-common/arch/x86/include -I./arch/x86/include/generated -I/usr/src/linux-headers-5.4.0-4-common/include -I./include -I/usr/src/linux-headers-5.4.0-4-common/arch/x86/include/uapi -I./arch/x86/include/generated/uapi -I/usr/src/linux-headers-5.4.0-4-common/include/uapi -I./include/generated/uapi -include /usr/src/linux-headers-5.4.0-4-common/include/linux/kconfig.h -include /usr/src/linux-headers-5.4.0-4-common/include/linux/compiler_types.h -D__KERNEL__ -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE -Werror=implicit-function-declaration -Werror=implicit-int -Wno-format-security -std=gnu89 -mno-sse -mno-mmx -mno-sse2 -mno-3dnow -mno-avx -m64 -falign-jumps=1 -falign-loops=1 -mno-80387 -mno-fp-ret-in-387 -mpreferred-stack-boundary=3 -mskip-rax-setup -mtune=generic -mno-red-zone -mcmodel=kernel -DCONFIG_X86_X32_ABI -DCONFIG_AS_CFI=1 -DCONFIG_AS_CFI_SIGNAL_FRAME=1 -DCONFIG_AS_CFI_SECTIONS=1 -DCONFIG_AS_SSSE3=1 -DCONFIG_AS_AVX=1 -DCONFIG_AS_AVX2=1 -DCONFIG_AS_AVX512=1 -DCONFIG_AS_SHA1_NI=1 -DCONFIG_AS_SHA256_NI=1 -Wno-sign-compare -fno-asynchronous-unwind-tables -mindirect-branch=thunk-extern -mindirect-branch-register -fno-jump-tables -fno-delete-null-pointer-checks -Wno-frame-address -Wno-format-truncation -Wno-format-overflow -Wno-address-of-packed-member -O2 --param=allow-store-data-races=0 -Wframe-larger-than=2048 -fstack-protector-strong -Wno-unused-but-set-variable -Wimplicit-fallthrough -Wno-unused-const-variable -fno-var-tracking-assignments -g -pg -mrecord-mcount -mfentry -DCC_USING_FENTRY -flive-patching=inline-clone -Wdeclaration-after-statement -Wvla -Wno-pointer-sign -Wno-stringop-truncation -fno-strict-overflow -fno-merge-all-constants -fmerge-constants -fno-stack-check -fconserve-stack -Werror=date-time -Werror=incompatible-pointer-types -Werror=designated-init -fmacro-prefix-map=/usr/src/linux-headers-5.4.0-4-common/= -fcf-protection=none -Wno-packed-not-aligned -Wno-declaration-after-statement -include /tmp/vbox.0/include/VBox/VBoxGuestMangling.h -fno-pie -I/usr/src/linux-headers-5.4.0-4-common/include -I/tmp/vbox.0/ -I/tmp/vbox.0/include -I/tmp/vbox.0/r0drv/linux -I/tmp/vbox.0/vboxguest/ -I/tmp/vbox.0/vboxguest/include -I/tmp/vbox.0/vboxguest/r0drv/linux -D__KERNEL__ -DMODULE -DVBOX -DRT_OS_LINUX -DIN_RING0 -DIN_RT_R0 -DIN_GUEST -DIN_GUEST_R0 -DIN_MODULE -DRT_WITH_VBOX -DVBGL_VBOXGUEST -DVBOX_WITH_HGCM -DRT_ARCH_AMD64 -DVBOX_WITH_64_BITS_GUESTS -DMODULE -DKBUILD_BASENAME='"VBoxGuest_linux"' -DKBUILD_MODNAME='"vboxguest"' /tmp/vbox.0/VBoxGuest-linux.c | scripts/genksyms/genksyms -r /dev/null > /tmp/vbox.0/.tmp_VBoxGuest-linux.ver; ld -m elf_x86_64 -z max-page-size=0x200000 -r -o /tmp/vbox.0/.tmp_VBoxGuest-linux.o /tmp/vbox.0/VBoxGuest-linux.o -T /tmp/vbox.0/.tmp_VBoxGuest-linux.ver; mv -f /tmp/vbox.0/.tmp_VBoxGuest-linux.o /tmp/vbox.0/VBoxGuest-linux.o; rm -f /tmp/vbox.0/.tmp_VBoxGuest-linux.ver; fi gcc-9 -Wp,-MD,/tmp/vbox.0/.VBoxGuest.o.d -nostdinc -isystem /usr/lib/gcc/x86_64-linux-gnu/9/include -I/usr/src/linux-headers-5.4.0-4-common/arch/x86/include -I./arch/x86/include/generated -I/usr/src/linux-headers-5.4.0-4-common/include -I./include -I/usr/src/linux-headers-5.4.0-4-common/arch/x86/include/uapi -I./arch/x86/include/generated/uapi -I/usr/src/linux-headers-5.4.0-4-common/include/uapi -I./include/generated/uapi -include /usr/src/linux-headers-5.4.0-4-common/include/linux/kconfig.h -include /usr/src/linux-headers-5.4.0-4-common/include/linux/compiler_types.h -D__KERNEL__ -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE -Werror=implicit-function-declaration -Werror=implicit-int -Wno-format-security -std=gnu89 -mno-sse -mno-mmx -mno-sse2 -mno-3dnow -mno-avx -m64 -falign-jumps=1 -falign-loops=1 -mno-80387 -mno-fp-ret-in-387 -mpreferred-stack-boundary=3 -mskip-rax-setup -mtune=generic -mno-red-zone -mcmodel=kernel -DCONFIG_X86_X32_ABI -DCONFIG_AS_CFI=1 -DCONFIG_AS_CFI_SIGNAL_FRAME=1 -DCONFIG_AS_CFI_SECTIONS=1 -DCONFIG_AS_SSSE3=1 -DCONFIG_AS_AVX=1 -DCONFIG_AS_AVX2=1 -DCONFIG_AS_AVX512=1 -DCONFIG_AS_SHA1_NI=1 -DCONFIG_AS_SHA256_NI=1 -Wno-sign-compare -fno-asynchronous-unwind-tables -mindirect-branch=thunk-extern -mindirect-branch-register -fno-jump-tables -fno-delete-null-pointer-checks -Wno-frame-address -Wno-format-truncation -Wno-format-overflow -Wno-address-of-packed-member -O2 --param=allow-store-data-races=0 -Wframe-larger-than=2048 -fstack-protector-strong -Wno-unused-but-set-variable -Wimplicit-fallthrough -Wno-unused-const-variable -fno-var-tracking-assignments -g -pg -mrecord-mcount -mfentry -DCC_USING_FENTRY -flive-patching=inline-clone -Wdeclaration-after-statement -Wvla -Wno-pointer-sign -Wno-stringop-truncation -fno-strict-overflow -fno-merge-all-constants -fmerge-constants -fno-stack-check -fconserve-stack -Werror=date-time -Werror=incompatible-pointer-types -Werror=designated-init -fmacro-prefix-map=/usr/src/linux-headers-5.4.0-4-common/= -fcf-protection=none -Wno-packed-not-aligned -Wno-declaration-after-statement -include /tmp/vbox.0/include/VBox/VBoxGuestMangling.h -fno-pie -I/usr/src/linux-headers-5.4.0-4-common/include -I/tmp/vbox.0/ -I/tmp/vbox.0/include -I/tmp/vbox.0/r0drv/linux -I/tmp/vbox.0/vboxguest/ -I/tmp/vbox.0/vboxguest/include -I/tmp/vbox.0/vboxguest/r0drv/linux -D__KERNEL__ -DMODULE -DVBOX -DRT_OS_LINUX -DIN_RING0 -DIN_RT_R0 -DIN_GUEST -DIN_GUEST_R0 -DIN_MODULE -DRT_WITH_VBOX -DVBGL_VBOXGUEST -DVBOX_WITH_HGCM -DRT_ARCH_AMD64 -DVBOX_WITH_64_BITS_GUESTS -DMODULE -DKBUILD_BASENAME='"VBoxGuest"' -DKBUILD_MODNAME='"vboxguest"' -c -o /tmp/vbox.0/VBoxGuest.o /tmp/vbox.0/VBoxGuest.c /tmp/vbox.0/VBoxGuest.c: In function ‘vgdrvCheckIfVmmReqIsAllowed’: /tmp/vbox.0/VBoxGuest.c:2060:16: warning: this statement may fall through [-Wimplicit-fallthrough=] 2060 | if (pSession->fUserSession) | ^ /tmp/vbox.0/VBoxGuest.c:2062:9: note: here 2062 | case kLevel_AllUsers: | ^~~~ ./tools/objtool/objtool orc generate --module --no-fp --retpoline --uaccess /tmp/vbox.0/VBoxGuest.o if objdump -h /tmp/vbox.0/VBoxGuest.o | grep -q __ksymtab; then gcc-9 <compile flags deleted to fit in 30 000 characters>fi gcc-9 -Wp,-MD,/tmp/vbox.0/.VBoxGuestR0LibGenericRequest.o.d -nostdinc -isystem /usr/lib/gcc/x86_64-linux-gnu/9/include -I/usr/src/linux-headers-5.4.0-4-common/arch/x86/include -I./arch/x86/include/generated -I/usr/src/linux-headers-5.4.0-4-common/include -I./include -I/usr/src/linux-headers-5.4.0-4-common/arch/x86/include/uapi -I./arch/x86/include/generated/uapi -I/usr/src/linux-headers-5.4.0-4-common/include/uapi -I./include/generated/uapi -include /usr/src/linux-headers-5.4.0-4-common/include/linux/kconfig.h -include /usr/src/linux-headers-5.4.0-4-common/include/linux/compiler_types.h -D__KERNEL__ -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE -Werror=implicit-function-declaration -Werror=implicit-int -Wno-format-security -std=gnu89 -mno-sse -mno-mmx -mno-sse2 -mno-3dnow -mno-avx -m64 -falign-jumps=1 -falign-loops=1 -mno-80387 -mno-fp-ret-in-387 -mpreferred-stack-boundary=3 -mskip-rax-setup -mtune=generic -mno-red-zone -mcmodel=kernel -DCONFIG_X86_X32_ABI -DCONFIG_AS_CFI=1 -DCONFIG_AS_CFI_SIGNAL_FRAME=1 -DCONFIG_AS_CFI_SECTIONS=1 -DCONFIG_AS_SSSE3=1 -DCONFIG_AS_AVX=1 -DCONFIG_AS_AVX2=1 -DCONFIG_AS_AVX512=1 -DCONFIG_AS_SHA1_NI=1 -DCONFIG_AS_SHA256_NI=1 -Wno-sign-compare -fno-asynchronous-unwind-tables -mindirect-branch=thunk-extern -mindirect-branch-register -fno-jump-tables -fno-delete-null-pointer-checks -Wno-frame-address -Wno-format-truncation -Wno-format-overflow -Wno-address-of-packed-member -O2 --param=allow-store-data-races=0 -Wframe-larger-than=2048 -fstack-protector-strong -Wno-unused-but-set-variable -Wimplicit-fallthrough -Wno-unused-const-variable -fno-var-tracking-assignments -g -pg -mrecord-mcount -mfentry -DCC_USING_FENTRY -flive-patching=inline-clone -Wdeclaration-after-statement -Wvla -Wno-pointer-sign -Wno-stringop-truncation -fno-strict-overflow -fno-merge-all-constants -fmerge-constants -fno-stack-check -fconserve-stack -Werror=date-time -Werror=incompatible-pointer-types -Werror=designated-init -fmacro-prefix-map=/usr/src/linux-headers-5.4.0-4-common/= -fcf-protection=none -Wno-packed-not-aligned -Wno-declaration-after-statement -include /tmp/vbox.0/include/VBox/VBoxGuestMangling.h -fno-pie -I/usr/src/linux-headers-5.4.0-4-common/include -I/tmp/vbox.0/ -I/tmp/vbox.0/include -I/tmp/vbox.0/r0drv/linux -I/tmp/vbox.0/vboxguest/ -I/tmp/vbox.0/vboxguest/include -I/tmp/vbox.0/vboxguest/r0drv/linux -D__KERNEL__ -DMODULE -DVBOX -DRT_OS_LINUX -DIN_RING0 -DIN_RT_R0 -DIN_GUEST -DIN_GUEST_R0 -DIN_MODULE -DRT_WITH_VBOX -DVBGL_VBOXGUEST -DVBOX_WITH_HGCM -DRT_ARCH_AMD64 -DVBOX_WITH_64_BITS_GUESTS -DMODULE -DKBUILD_BASENAME='"VBoxGuestR0LibGenericRequest"' -DKBUILD_MODNAME='"vboxguest"' -c -o /tmp/vbox.0/VBoxGuestR0LibGenericRequest.o /tmp/vbox.0/VBoxGuestR0LibGenericRequest.c ./tools/objtool/objtool orc generate --module --no-fp --retpoline --uaccess /tmp/vbox.0/VBoxGuestR0LibGenericRequest.o if objdump -h /tmp/vbox.0/VBoxGuestR0LibGenericRequest.o | grep -q __ksymtab; then gcc-9 -E -D__GENKSYMS__ -Wp,-MD,/tmp/vbox.0/.VBoxGuestR0LibGenericRequest.o.d -nostdinc -isystem /usr/lib/gcc/x86_64-linux-gnu/9/include -I/usr/src/linux-headers-5.4.0-4-common/arch/x86/include -I./arch/x86/include/generated -I/usr/src/linux-headers-5.4.0-4-common/include -I./include -I/usr/src/linux-headers-5.4.0-4-common/arch/x86/include/uapi -I./arch/x86/include/generated/uapi -I/usr/src/linux-headers-5.4.0-4-common/include/uapi -I./include/generated/uapi -include /usr/src/linux-headers-5.4.0-4-common/include/linux/kconfig.h -include /usr/src/linux-headers-5.4.0-4-common/include/linux/compiler_types.h -D__KERNEL__ -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE -Werror=implicit-function-declaration -Werror=implicit-int -Wno-format-security -std=gnu89 -mno-sse -mno-mmx -mno-sse2 -mno-3dnow -mno-avx -m64 -falign-jumps=1 -falign-loops=1 -mno-80387 -mno-fp-ret-in-387 -mpreferred-stack-boundary=3 -mskip-rax-setup -mtune=generic -mno-red-zone -mcmodel=kernel -DCONFIG_X86_X32_ABI -DCONFIG_AS_CFI=1 -DCONFIG_AS_CFI_SIGNAL_FRAME=1 -DCONFIG_AS_CFI_SECTIONS=1 -DCONFIG_AS_SSSE3=1 -DCONFIG_AS_AVX=1 -DCONFIG_AS_AVX2=1 -DCONFIG_AS_AVX512=1 -DCONFIG_AS_SHA1_NI=1 -DCONFIG_AS_SHA256_NI=1 -Wno-sign-compare -fno-asynchronous-unwind-tables -mindirect-<some flags removed to fit into 30 000 char> -DVBOX_WITH_64_BITS_GUESTS -DMODULE -DKBUILD_BASENAME='"VBoxGuestR0LibGenericRequest"' -DKBUILD_MODNAME='"vboxguest"' /tmp/vbox.0/VBoxGuestR0LibGenericRequest.c | scripts/genksyms/genksyms -r /dev/null > /tmp/vbox.0/.tmp_VBoxGuestR0LibGenericRequest.ver; ld -m elf_x86_64 -z max-page-size=0x200000 -r -o /tmp/vbox.0/.tmp_VBoxGuestR0LibGenericRequest.o /tmp/vbox.0/VBoxGuestR0LibGenericRequest.o -T /tmp/vbox.0/.tmp_VBoxGuestR0LibGenericRequest.ver; mv -f /tmp/vbox.0/.tmp_VBoxGuestR0LibGenericRequest.o /tmp/vbox.0/VBoxGuestR0LibGenericRequest.o; rm -f /tmp/vbox.0/.tmp_VBoxGuestR0LibGenericRequest.ver; fi gcc-9 -Wp,-MD,/tmp/vbox.0/.VBoxGuestR0LibHGCMInternal.o.d -nostdinc -isystem /usr/lib/gcc/x86_64-linux-gnu/9/include -I/usr/src/linux-headers-5.4.0-4-common/arch/x86/include -I./arch/x86/include/generated -I/usr/src/linux-headers-5.4.0-4-common/include -I./include -I/usr/src/linux-headers-5.4.0-4-common/arch/x86/include/uapi -I./arch/x86/include/generated/uapi -I/usr/src/linux-headers-5.4.0-4-common/include/uapi -I./include/generated/uapi -include /usr/src/linux-headers-5.4.0-4-common/include/linux/kconfig.h -include /usr/src/linux-headers-5.4.0-4-common/include/linux/compiler_types.h -D__KERNEL__ -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE -Werror=implicit-function-declaration -Werror=implicit-int -Wno-format-security -std=gnu89 -mno-sse -mno-mmx -mno-sse2 -mno-3dnow -mno-avx -m64 -falign-jumps=1 -falign-loops=1 -mno-80387 -mno-fp-ret-in-387 -mpreferred-stack-boundary=3 -mskip-rax-setup -mtune=generic -mno-red-zone -mcmodel=kernel -DCONFIG_X86_X32_ABI -DCONFIG_AS_CFI=1 -DCONFIG_AS_CFI_SIGNAL_FRAME=1 -DCONFIG_AS_CFI_SECTIONS=1 -DCONFIG_AS_SSSE3=1 -DCONFIG_AS_AVX=1 -DCONFIG_AS_AVX2=1 -DCONFIG_AS_AVX512=1 -DCONFIG_AS_SHA1_NI=1 -DCONFIG_AS_SHA256_NI=1 -Wno-sign-compare -fno-asynchronous-unwind-tables -mindirect-branch=thunk-extern -mindirect-branch-register -fno-jump-tables -fno-delete-null-pointer-checks -Wno-frame-address -Wno-format-truncation -Wno-format-overflow -Wno-address-of-packed-member -O2 --param=allow-store-data-races=0 -Wframe-larger-than=2048 -fstack-protector-strong -Wno-unused-but-set-variable -Wimplicit-fallthrough -Wno-unused-const-variable -fno-var-tracking-assignments -g -pg -mrecord-mcount -mfentry -DCC_USING_FENTRY -flive-patching=inline-clone -Wdeclaration-after-statement -Wvla -Wno-pointer-sign -Wno-stringop-truncation -fno-strict-overflow -fno-merge-all-constants -fmerge-constants -fno-stack-check -fconserve-stack -Werror=date-time -Werror=incompatible-pointer-types -Werror=designated-init -fmacro-prefix-map=/usr/src/linux-headers-5.4.0-4-common/= -fcf-protection=none -Wno-packed-not-aligned -Wno-declaration-after-statement -include /tmp/vbox.0/include/VBox/VBoxGuestMangling.h -fno-pie -I/usr/src/linux-headers-5.4.0-4-common/include -I/tmp/vbox.0/ -I/tmp/vbox.0/include -I/tmp/vbox.0/r0drv/linux -I/tmp/vbox.0/vboxguest/ -I/tmp/vbox.0/vboxguest/include -I/tmp/vbox.0/vboxguest/r0drv/linux -D__KERNEL__ -DMODULE -DVBOX -DRT_OS_LINUX -DIN_RING0 -DIN_RT_R0 -DIN_GUEST -DIN_GUEST_R0 -DIN_MODULE -DRT_WITH_VBOX -DVBGL_VBOXGUEST -DVBOX_WITH_HGCM -DRT_ARCH_AMD64 -DVBOX_WITH_64_BITS_GUESTS -DMODULE -DKBUILD_BASENAME='"VBoxGuestR0LibHGCMInternal"' -DKBUILD_MODNAME='"vboxguest"' -c -o /tmp/vbox.0/VBoxGuestR0LibHGCMInternal.o /tmp/vbox.0/VBoxGuestR0LibHGCMInternal.c In file included from /usr/src/linux-headers-5.4.0-4-common/include/linux/compiler_types.h:59, from <command-line>: /tmp/vbox.0/VBoxGuestR0LibHGCMInternal.c: In function ‘vbglR0HGCMInternalPreprocessCall’: /usr/src/linux-headers-5.4.0-4-common/include/linux/compiler_attributes.h:200:41: error: expected ‘)’ before ‘__attribute__’ 200 | # define fallthrough __attribute__((__fallthrough__)) | ^~~~~~~~~~~~~ /tmp/vbox.0/include/iprt/cdefs.h:1116:48: note: in expansion of macro ‘fallthrough’ 1116 | # define RT_FALL_THROUGH() __attribute__((fallthrough)) | ^~~~~~~~~~~ /tmp/vbox.0/include/iprt/cdefs.h:1123:33: note: in expansion of macro ‘RT_FALL_THROUGH’ 1123 | #define RT_FALL_THRU() RT_FALL_THROUGH() | ^~~~~~~~~~~~~~~ /tmp/vbox.0/VBoxGuestR0LibHGCMInternal.c:271:17: note: in expansion of macro ‘RT_FALL_THRU’ 271 | RT_FALL_THRU(); | ^~~~~~~~~~~~ In file included from /tmp/vbox.0/include/iprt/types.h:29, from /tmp/vbox.0/VBoxGuestR0LibInternal.h:33, from /tmp/vbox.0/VBoxGuestR0LibHGCMInternal.c:33: /tmp/vbox.0/include/iprt/cdefs.h:1116:60: error: expected identifier or ‘(’ before ‘)’ token 1116 | # define RT_FALL_THROUGH() __attribute__((fallthrough)) | ^ /tmp/vbox.0/include/iprt/cdefs.h:1123:33: note: in expansion of macro ‘RT_FALL_THROUGH’ 1123 | #define RT_FALL_THRU() RT_FALL_THROUGH() | ^~~~~~~~~~~~~~~ /tmp/vbox.0/VBoxGuestR0LibHGCMInternal.c:271:17: note: in expansion of macro ‘RT_FALL_THRU’ 271 | RT_FALL_THRU(); | ^~~~~~~~~~~~ In file included from /usr/src/linux-headers-5.4.0-4-common/include/linux/compiler_types.h:59, from <command-line>: /tmp/vbox.0/VBoxGuestR0LibHGCMInternal.c: In function ‘vbglR0HGCMInternalInitCall’: /usr/src/linux-headers-5.4.0-4-common/include/linux/compiler_attributes.h:200:41: error: expected ‘)’ before ‘__attribute__’ 200 | # define fallthrough __attribute__((__fallthrough__)) | ^~~~~~~~~~~~~ /tmp/vbox.0/include/iprt/cdefs.h:1116:48: note: in expansion of macro ‘fallthrough’ 1116 | # define RT_FALL_THROUGH() __attribute__((fallthrough)) | ^~~~~~~~~~~ /tmp/vbox.0/include/iprt/cdefs.h:1123:33: note: in expansion of macro ‘RT_FALL_THROUGH’ 1123 | #define RT_FALL_THRU() RT_FALL_THROUGH() | ^~~~~~~~~~~~~~~ /tmp/vbox.0/VBoxGuestR0LibHGCMInternal.c:545:17: note: in expansion of macro ‘RT_FALL_THRU’ 545 | RT_FALL_THRU(); | ^~~~~~~~~~~~ In file included from /tmp/vbox.0/include/iprt/types.h:29, from /tmp/vbox.0/VBoxGuestR0LibInternal.h:33, from /tmp/vbox.0/VBoxGuestR0LibHGCMInternal.c:33: /tmp/vbox.0/include/iprt/cdefs.h:1116:60: error: expected identifier or ‘(’ before ‘)’ token 1116 | # define RT_FALL_THROUGH() __attribute__((fallthrough)) | ^ /tmp/vbox.0/include/iprt/cdefs.h:1123:33: note: in expansion of macro ‘RT_FALL_THROUGH’ 1123 | #define RT_FALL_THRU() RT_FALL_THROUGH() | ^~~~~~~~~~~~~~~ /tmp/vbox.0/VBoxGuestR0LibHGCMInternal.c:545:17: note: in expansion of macro ‘RT_FALL_THRU’ 545 | RT_FALL_THRU(); | ^~~~~~~~~~~~ In file included from /usr/src/linux-headers-5.4.0-4-common/include/linux/compiler_types.h:59, from <command-line>: /tmp/vbox.0/VBoxGuestR0LibHGCMInternal.c: In function ‘vbglR0HGCMInternalCopyBackResult’: /usr/src/linux-headers-5.4.0-4-common/include/linux/compiler_attributes.h:200:41: error: expected ‘)’ before ‘__attribute__’ 200 | # define fallthrough __attribute__((__fallthrough__)) | ^~~~~~~~~~~~~ /tmp/vbox.0/include/iprt/cdefs.h:1116:48: note: in expansion of macro ‘fallthrough’ 1116 | # define RT_FALL_THROUGH() __attribute__((fallthrough)) | ^~~~~~~~~~~ /tmp/vbox.0/include/iprt/cdefs.h:1123:33: note: in expansion of macro ‘RT_FALL_THROUGH’ 1123 | #define RT_FALL_THRU() RT_FALL_THROUGH() | ^~~~~~~~~~~~~~~ /tmp/vbox.0/VBoxGuestR0LibHGCMInternal.c:812:17: note: in expansion of macro ‘RT_FALL_THRU’ 812 | RT_FALL_THRU(); | ^~~~~~~~~~~~ In file included from /tmp/vbox.0/include/iprt/types.h:29, from /tmp/vbox.0/VBoxGuestR0LibInternal.h:33, from /tmp/vbox.0/VBoxGuestR0LibHGCMInternal.c:33: /tmp/vbox.0/include/iprt/cdefs.h:1116:60: error: expected identifier or ‘(’ before ‘)’ token 1116 | # define RT_FALL_THROUGH() __attribute__((fallthrough)) | ^ /tmp/vbox.0/include/iprt/cdefs.h:1123:33: note: in expansion of macro ‘RT_FALL_THROUGH’ 1123 | #define RT_FALL_THRU() RT_FALL_THROUGH() | ^~~~~~~~~~~~~~~ /tmp/vbox.0/VBoxGuestR0LibHGCMInternal.c:812:17: note: in expansion of macro ‘RT_FALL_THRU’ 812 | RT_FALL_THRU(); | ^~~~~~~~~~~~ /tmp/vbox.0/VBoxGuestR0LibHGCMInternal.c: In function ‘vbglR0HGCMInternalPreprocessCall’: /tmp/vbox.0/VBoxGuestR0LibHGCMInternal.c:259:20: warning: this statement may fall through [-Wimplicit-fallthrough=] 259 | if (!VBGLR0_CAN_USE_PHYS_PAGE_LIST(/*a_fLocked =*/ true)) | ^ /tmp/vbox.0/VBoxGuestR0LibHGCMInternal.c:273:13: note: here 273 | case VMMDevHGCMParmType_LinAddr_In: | ^~~~ /tmp/vbox.0/VBoxGuestR0LibHGCMInternal.c: In function ‘vbglR0HGCMInternalInitCall’: /tmp/vbox.0/VBoxGuestR0LibHGCMInternal.c:539:20: warning: this statement may fall through [-Wimplicit-fallthrough=] 539 | if (!VBGLR0_CAN_USE_PHYS_PAGE_LIST(/*a_fLocked =*/ true)) | ^ /tmp/vbox.0/VBoxGuestR0LibHGCMInternal.c:547:13: note: here 547 | case VMMDevHGCMParmType_LinAddr_In: | ^~~~ /tmp/vbox.0/VBoxGuestR0LibHGCMInternal.c: In function ‘vbglR0HGCMInternalCopyBackResult’: /tmp/vbox.0/VBoxGuestR0LibHGCMInternal.c:807:20: warning: this statement may fall through [-Wimplicit-fallthrough=] 807 | if (!VBGLR0_CAN_USE_PHYS_PAGE_LIST(/*a_fLocked =*/ true)) | ^ /tmp/vbox.0/VBoxGuestR0LibHGCMInternal.c:814:13: note: here 814 | case VMMDevHGCMParmType_LinAddr_Out: | ^~~~ make[3]: *** [/usr/src/linux-headers-5.4.0-4-common/scripts/Makefile.build:271: /tmp/vbox.0/VBoxGuestR0LibHGCMInternal.o] Error 1 make[2]: *** [/usr/src/linux-headers-5.4.0-4-common/Makefile:1665: /tmp/vbox.0] Error 2 make[1]: *** [/usr/src/linux-headers-5.4.0-4-common/Makefile:179: sub-make] Error 2 make: *** [/tmp/vbox.0/Makefile.include.footer:100: vboxguest] Error 2 My compiler is:
$ gcc -v Using built-in specs. COLLECT_GCC=gcc COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/9/lto-wrapper OFFLOAD_TARGET_NAMES=nvptx-none:hsa OFFLOAD_TARGET_DEFAULT=1 Target: x86_64-linux-gnu Configured with: ../src/configure -v --with-pkgversion='Debian 9.2.1-30' --with-bugurl=file:///usr/share/doc/gcc-9/README.Bugs --enable-languages=c,ada,c++,go,d,fortran,objc,obj-c++,gm2 --prefix=/usr --with-gcc-major-version-only --program-suffix=-9 --program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --libdir=/usr/lib --enable-nls --enable-bootstrap --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --with-default-libstdcxx-abi=new --enable-gnu-unique-object --disable-vtable-verify --enable-plugin --enable-default-pie --with-system-zlib --with-target-system-zlib=auto --enable-objc-gc=auto --enable-multiarch --disable-werror --with-arch-32=i686 --with-abi=m64 --with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic --enable-offload-targets=nvptx-none,hsa --without-cuda-driver --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu --with-build-config=bootstrap-lto-lean --enable-link-mutex Thread model: posix gcc version 9.2.1 20200224 (Debian 9.2.1-30) 
echoand not an actual(?!?) error. I am lost.Could not find the X.Org or XFree86 Window System, skipping.and fixed it indirectly by installing a desktop environment. Because the compilation STILL fails, I am finally uploading the complete log.