From: Stephen Rothwell <hidden> Date: 2021-08-26 09:13:36
Hi all,
After merging the kbuild tree, today's linux-next build (x86_64
allnoconfig) failed like this:
make[2]: *** No rule to make target 'scripts/mod/empty.o', needed by '__build'.
Caused by commit
624a912f84bc ("kbuild: detect objtool changes correctly and remove .SECONDEXPANSION")
(at least, reverting that commit fixes it)
I use a separate object directory and, in this case, it is newly created.
A build with V=1 and -s removed (and no -j) gives this around the
failure:
make -f /home/sfr/next/next/scripts/Makefile.build obj=scripts/mod
make[2]: *** No rule to make target 'scripts/mod/empty.o', needed by '__build'. Stop.
make[1]: *** [/home/sfr/next/next/Makefile:1309: prepare0] Error 2
I have reverted that commit for today.
--
Cheers,
Stephen Rothwell
On Thu, Aug 26, 2021 at 6:13 PM Stephen Rothwell [off-list ref] wrote:
Hi all,
After merging the kbuild tree, today's linux-next build (x86_64
allnoconfig) failed like this:
make[2]: *** No rule to make target 'scripts/mod/empty.o', needed by '__build'.
Caused by commit
624a912f84bc ("kbuild: detect objtool changes correctly and remove .SECONDEXPANSION")
(at least, reverting that commit fixes it)
I use a separate object directory and, in this case, it is newly created.
A build with V=1 and -s removed (and no -j) gives this around the
failure:
make -f /home/sfr/next/next/scripts/Makefile.build obj=scripts/mod
make[2]: *** No rule to make target 'scripts/mod/empty.o', needed by '__build'. Stop.
make[1]: *** [/home/sfr/next/next/Makefile:1309: prepare0] Error 2
I have reverted that commit for today.
--
Cheers,
Stephen Rothwell
Hmm, it is strange.
I re-applied that commit based on today's linux-next
(git cherry-pick 624a912f84bc)
allnoconfig built successfully.
My build log is as follows.
Can you tell the exact steps to reproduce the error?
masahiro@grover:~/ref/linux-next$ git log -2 --oneline
5046c6516ca2 (HEAD -> tmp) kbuild: detect objtool changes correctly
and remove .SECONDEXPANSION
88fac11862d3 (tag: next-20210826, origin/master, origin/HEAD) Add
linux-next specific files for 20210826
masahiro@grover:~/ref/linux-next$ rm -rf /tmp/foo
masahiro@grover:~/ref/linux-next$ make O=/tmp/foo allnoconfig all
make[1]: Entering directory '/tmp/foo'
GEN Makefile
HOSTCC scripts/basic/fixdep
HOSTCC scripts/kconfig/conf.o
HOSTCC scripts/kconfig/confdata.o
HOSTCC scripts/kconfig/expr.o
LEX scripts/kconfig/lexer.lex.c
YACC scripts/kconfig/parser.tab.[ch]
HOSTCC scripts/kconfig/lexer.lex.o
HOSTCC scripts/kconfig/menu.o
HOSTCC scripts/kconfig/parser.tab.o
HOSTCC scripts/kconfig/preprocess.o
HOSTCC scripts/kconfig/symbol.o
HOSTCC scripts/kconfig/util.o
HOSTLD scripts/kconfig/conf
#
# configuration written to .config
#
GEN Makefile
SYSHDR arch/x86/include/generated/uapi/asm/unistd_32.h
SYSHDR arch/x86/include/generated/uapi/asm/unistd_64.h
SYSHDR arch/x86/include/generated/uapi/asm/unistd_x32.h
SYSTBL arch/x86/include/generated/asm/syscalls_32.h
HOSTCC arch/x86/tools/relocs_32.o
HOSTCC arch/x86/tools/relocs_64.o
HOSTCC arch/x86/tools/relocs_common.o
HOSTLD arch/x86/tools/relocs
HOSTCC scripts/kallsyms
HOSTCC scripts/sorttable
WRAP arch/x86/include/generated/uapi/asm/bpf_perf_event.h
WRAP arch/x86/include/generated/uapi/asm/errno.h
WRAP arch/x86/include/generated/uapi/asm/fcntl.h
WRAP arch/x86/include/generated/uapi/asm/ioctl.h
WRAP arch/x86/include/generated/uapi/asm/ioctls.h
WRAP arch/x86/include/generated/uapi/asm/ipcbuf.h
WRAP arch/x86/include/generated/uapi/asm/param.h
WRAP arch/x86/include/generated/uapi/asm/poll.h
WRAP arch/x86/include/generated/uapi/asm/resource.h
WRAP arch/x86/include/generated/uapi/asm/socket.h
WRAP arch/x86/include/generated/uapi/asm/sockios.h
WRAP arch/x86/include/generated/uapi/asm/termbits.h
WRAP arch/x86/include/generated/uapi/asm/termios.h
WRAP arch/x86/include/generated/uapi/asm/types.h
WRAP arch/x86/include/generated/asm/early_ioremap.h
WRAP arch/x86/include/generated/asm/export.h
WRAP arch/x86/include/generated/asm/mcs_spinlock.h
WRAP arch/x86/include/generated/asm/irq_regs.h
WRAP arch/x86/include/generated/asm/kmap_size.h
WRAP arch/x86/include/generated/asm/local64.h
WRAP arch/x86/include/generated/asm/mmiowb.h
WRAP arch/x86/include/generated/asm/module.lds.h
WRAP arch/x86/include/generated/asm/rwonce.h
WRAP arch/x86/include/generated/asm/unaligned.h
UPD include/config/kernel.release
UPD include/generated/uapi/linux/version.h
UPD include/generated/utsrelease.h
CC scripts/mod/empty.o
HOSTCC scripts/mod/mk_elfconfig
MKELF scripts/mod/elfconfig.h
HOSTCC scripts/mod/modpost.o
CC scripts/mod/devicetable-offsets.s
UPD scripts/mod/devicetable-offsets.h
HOSTCC scripts/mod/file2alias.o
HOSTCC scripts/mod/sumversion.o
HOSTLD scripts/mod/modpost
CC kernel/bounds.s
UPD include/generated/bounds.h
UPD include/generated/timeconst.h
CC arch/x86/kernel/asm-offsets.s
UPD include/generated/asm-offsets.h
CALL /home/masahiro/ref/linux-next/scripts/checksyscalls.sh
CALL /home/masahiro/ref/linux-next/scripts/atomic/check-atomics.sh
CC init/main.o
CHK include/generated/compile.h
UPD include/generated/compile.h
CC init/version.o
CC init/do_mounts.o
CC init/noinitramfs.o
CC init/calibrate.o
CC init/init_task.o
AR init/built-in.a
AR usr/built-in.a
CC arch/x86/entry/vdso/vma.o
CC arch/x86/entry/vdso/extable.o
CC arch/x86/entry/vdso/vdso32-setup.o
LDS arch/x86/entry/vdso/vdso32/vdso32.lds
AS arch/x86/entry/vdso/vdso32/note.o
AS arch/x86/entry/vdso/vdso32/system_call.o
AS arch/x86/entry/vdso/vdso32/sigreturn.o
CC arch/x86/entry/vdso/vdso32/vclock_gettime.o
VDSO arch/x86/entry/vdso/vdso32.so.dbg
/home/masahiro/ref/linux-next/arch/x86/entry/vdso/Makefile:135: FORCE
prerequisite is missing
OBJCOPY arch/x86/entry/vdso/vdso32.so
HOSTCC arch/x86/entry/vdso/vdso2c
VDSO2C arch/x86/entry/vdso/vdso-image-32.c
CC arch/x86/entry/vdso/vdso-image-32.o
AR arch/x86/entry/vdso/built-in.a
[snip]
--
Best Regards
Masahiro Yamada
From: Stephen Rothwell <hidden> Date: 2021-08-27 01:50:59
Hi Masahiro,
On Fri, 27 Aug 2021 09:52:18 +0900 Masahiro Yamada [off-list ref] wrote:
On Thu, Aug 26, 2021 at 6:13 PM Stephen Rothwell [off-list ref] wrote:
quoted
After merging the kbuild tree, today's linux-next build (x86_64
allnoconfig) failed like this:
make[2]: *** No rule to make target 'scripts/mod/empty.o', needed by '__build'.
Caused by commit
624a912f84bc ("kbuild: detect objtool changes correctly and remove .SECONDEXPANSION")
(at least, reverting that commit fixes it)
I use a separate object directory and, in this case, it is newly created.
A build with V=1 and -s removed (and no -j) gives this around the
failure:
make -f /home/sfr/next/next/scripts/Makefile.build obj=scripts/mod
make[2]: *** No rule to make target 'scripts/mod/empty.o', needed by '__build'. Stop.
make[1]: *** [/home/sfr/next/next/Makefile:1309: prepare0] Error 2
I have reverted that commit for today.
Hmm, it is strange.
I re-applied that commit based on today's linux-next
(git cherry-pick 624a912f84bc)
allnoconfig built successfully.
My build log is as follows.
Can you tell the exact steps to reproduce the error?
masahiro@grover:~/ref/linux-next$ git log -2 --oneline
5046c6516ca2 (HEAD -> tmp) kbuild: detect objtool changes correctly
and remove .SECONDEXPANSION
88fac11862d3 (tag: next-20210826, origin/master, origin/HEAD) Add
linux-next specific files for 20210826
masahiro@grover:~/ref/linux-next$ rm -rf /tmp/foo
masahiro@grover:~/ref/linux-next$ make O=/tmp/foo allnoconfig all
I did more or less the same:
$ rm -rf ../x86_64_allnoconfig
$ mkdir ../x86_64_allnoconfig
$ make ARCH=x86_64 O=../x86_64_allnoconfig CROSS_COMPILE=x86_64-linux-gnu- allnoconfig
$ make V=1 ARCH=x86_64 O=../x86_64_allnoconfig CROSS_COMPILE=x86_64-linux-gnu- -O
I do cross builds hosted on a PowerPC LE host.
--
Cheers,
Stephen Rothwell
On Fri, Aug 27, 2021 at 10:50 AM Stephen Rothwell [off-list ref] wrote:
Hi Masahiro,
On Fri, 27 Aug 2021 09:52:18 +0900 Masahiro Yamada [off-list ref] wrote:
quoted
On Thu, Aug 26, 2021 at 6:13 PM Stephen Rothwell [off-list ref] wrote:
quoted
After merging the kbuild tree, today's linux-next build (x86_64
allnoconfig) failed like this:
make[2]: *** No rule to make target 'scripts/mod/empty.o', needed by '__build'.
Caused by commit
624a912f84bc ("kbuild: detect objtool changes correctly and remove .SECONDEXPANSION")
(at least, reverting that commit fixes it)
I use a separate object directory and, in this case, it is newly created.
A build with V=1 and -s removed (and no -j) gives this around the
failure:
make -f /home/sfr/next/next/scripts/Makefile.build obj=scripts/mod
make[2]: *** No rule to make target 'scripts/mod/empty.o', needed by '__build'. Stop.
make[1]: *** [/home/sfr/next/next/Makefile:1309: prepare0] Error 2
I have reverted that commit for today.
Hmm, it is strange.
I re-applied that commit based on today's linux-next
(git cherry-pick 624a912f84bc)
allnoconfig built successfully.
My build log is as follows.
Can you tell the exact steps to reproduce the error?
masahiro@grover:~/ref/linux-next$ git log -2 --oneline
5046c6516ca2 (HEAD -> tmp) kbuild: detect objtool changes correctly
and remove .SECONDEXPANSION
88fac11862d3 (tag: next-20210826, origin/master, origin/HEAD) Add
linux-next specific files for 20210826
masahiro@grover:~/ref/linux-next$ rm -rf /tmp/foo
masahiro@grover:~/ref/linux-next$ make O=/tmp/foo allnoconfig all
I did more or less the same:
$ rm -rf ../x86_64_allnoconfig
$ mkdir ../x86_64_allnoconfig
$ make ARCH=x86_64 O=../x86_64_allnoconfig CROSS_COMPILE=x86_64-linux-gnu- allnoconfig
$ make V=1 ARCH=x86_64 O=../x86_64_allnoconfig CROSS_COMPILE=x86_64-linux-gnu- -O
I do cross builds hosted on a PowerPC LE host.
--
Cheers,
Stephen Rothwell
Ah, OK.
Now I understood what was happening.
scripts/mod/ is built before objtool, so
the dependency is not met.
I was previously not able to reproduce it
because a stale objtool was remaining in my source tree.
'make clean' cannot clean up objtool.
I will fix it by tomorrow's linux-next.
--
Best Regards
Masahiro Yamada