(+CC: Josh Poimboeuf,Peter Zijlstra, objtool maintainer)
On Thu, May 18, 2023 at 8:27 AM Bjorn Helgaas <helgaas@xxxxxxxxxx> wrote:
>
> This is on v6.4-rc1. I fat-fingered the make target (I intended
> "pciehp.o", not "pciehp.c"), then interrupted the build when I noticed
> my mistake:
>
> 06:04:15 ~/linux (hotplug)$ make drivers/pci/hotplug/pciehp.c
> SYNC include/config/auto.conf.cmd
> ^Cmake: *** [include/config/auto.conf.cmd] Deleting file 'include/generated/rustc_cfg'
> make: *** [include/config/auto.conf.cmd] Deleting file 'include/generated/autoconf.h'
> make[2]: *** [scripts/kconfig/Makefile:77: syncconfig] Interrupt
> make[1]: *** [Makefile:692: syncconfig] Interrupt
> make: *** [Makefile:793: include/config/auto.conf.cmd] Interrupt
>
> Subsequent builds now fail ("pciehp.o" is *also* an incorrect target,
> but doesn't seem related to the error):
>
> 06:04:22 ~/linux (hotplug)$ make drivers/pci/hotplug/pciehp.o
> SYNC include/config/auto.conf.cmd
> UPD include/config/kernel.release
> UPD include/generated/utsrelease.h
> UPD include/generated/compile.h
> CC scripts/mod/empty.o
> MKELF scripts/mod/elfconfig.h
> HOSTCC scripts/mod/modpost.o
> CC scripts/mod/devicetable-offsets.s
> HOSTCC scripts/mod/file2alias.o
> HOSTCC scripts/mod/sumversion.o
> HOSTLD scripts/mod/modpost
> CC kernel/bounds.s
> CC arch/x86/kernel/asm-offsets.s
> CALL scripts/checksyscalls.sh
> DESCEND objtool
> HOSTCC /home/bjorn/linux/tools/objtool/fixdep.o
> HOSTLD /home/bjorn/linux/tools/objtool/fixdep-in.o
> LINK /home/bjorn/linux/tools/objtool/fixdep
> make[4]: *** No rule to make target '/usr/include/x86_64-linux-gnu/bits/sys_errlist.h', needed by '/home/bjorn/linux/tools/objtool/libsubcmd/exec-cmd.o'. Stop.
> make[3]: *** [Makefile:80: /home/bjorn/linux/tools/objtool/libsubcmd/libsubcmd-in.o] Error 2
> make[2]: *** [Makefile:78: /home/bjorn/linux/tools/objtool/libsubcmd/libsubcmd.a] Error 2
> make[1]: *** [Makefile:73: objtool] Error 2
> make: *** [Makefile:1440: tools/objtool] Error 2
>
> I finally got the right target, but the build still fails:
>
> 06:04:39 ~/linux (hotplug)$ make drivers/pci/hotplug/
> CALL scripts/checksyscalls.sh
> DESCEND objtool
> make[4]: *** No rule to make target '/usr/include/x86_64-linux-gnu/bits/sys_errlist.h', needed by '/home/bjorn/linux/tools/objtool/libsubcmd/exec-cmd.o'. Stop.
> make[3]: *** [Makefile:80: /home/bjorn/linux/tools/objtool/libsubcmd/libsubcmd-in.o] Error 2
> make[2]: *** [Makefile:78: /home/bjorn/linux/tools/objtool/libsubcmd/libsubcmd.a] Error 2
> make[1]: *** [Makefile:73: objtool] Error 2
> make: *** [Makefile:1440: tools/objtool] Error 2
>
> After "make distclean", everything works as expected, so maybe this is
> just the expected behavior after my initial user error? I dunno; it
> seemed surprising. Just FYI.
>
> Bjorn
I do not know what is happening on your build machine,
but judging from the error log, something went wrong
while building objtool.
objtool Makefile is not a part of Kbuild.
The maintainers of objtool may have some insight.
BTW, I could not reproduce the issue.
I could not find anything weird from the Kbuild perspective so far.
The errors in the single target builds are expected.
This is what I did.
$ git clean -fdx
$ make defconfig
$ make drivers/pci/hotplug/pciehp.c
-> Fail. This is expected behavior
$ make drivers/pci/hotplug/pciehp.o
-> Fail. This is also expected behavior
because CONFIG_HOTPLUG_PCI_PCIE is unset
$ make drivers/pci/hotplug/
-> success for me
Is this the same command sequence as you did?
--
Best Regards
Masahiro Yamada
