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authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2510020000 definitions=main-2510280018 Hi, Ian Kindly ping.  Could you reproduce it?  Any comments? Regards Changqing On 8/19/25 11:01, Changqing Li wrote: > > On 8/19/25 04:38, Ian Rogers wrote: >> CAUTION: This email comes from a non Wind River email account! >> Do not click links or open attachments unless you recognize the >> sender and know the content is safe. >> >> On Mon, Jul 28, 2025 at 2:31 AM wrote: >>> From: Changqing Li >>> >>> The command length of in-target scales with the depth of the directory >>> times the number of objects in the Makefile. When there are many >>> objects, and O=[absolute_path] is set, and the absolute_path is >>> relatively long. It is possile that this line "$(call >>> if_changed,$(host)ld_multi)" will report error: >>> "make[4]: /bin/sh: Argument list too long" >>> >>> For example, build perf tools with O=/long/output/path >>> >>> Like built-in.a and *.mod rules in scripts/Makefile.build, add >>> $(objpredix)/ by the shell command instead of by Make's builtin >>> function. >>> >>> Signed-off-by: Changqing Li >> Thanks Changqing, the change makes sense to me. The printf is pushing >> the values into xargs rather than using $^ with ld. I've tried >> reproducing the error to test your fix by creating long directory >> names in /tmp and then passing them to O=. I've not been able to do >> this. Could you send a reproduction for me to test? >> >> Thanks, >> Ian > > Hi, Ian > > Thanks. Here is my steps: > > 1. git clone https://github.com/torvalds/linux.git > > 2. cd linux/tools/perf/ > > 3. mkdir > /tmp/01234567890123456789/0123456789012345678901234567890123456789/0123456789012345678901234567890123456789/012345678901234567890123456789/01234567890123456789/012345678901234567890123456789/01234567890123456789012345678/9012345678901234567890123456789/012345678901234567890123456789/012345678901234567890123456789/01234567890123456789012345678901234567890123456789012345678901234567890123/perf-1.0 > > 4.  make NO_LIBTRACEEVENT=1 > O=/tmp/01234567890123456789/0123456789012345678901234567890123456789/0123456789012345678901234567890123456789/012345678901234567890123456789/01234567890123456789/012345678901234567890123456789/01234567890123456789012345678/9012345678901234567890123456789/012345678901234567890123456789/012345678901234567890123456789/01234567890123456789012345678901234567890123456789012345678901234567890123/perf-1.0 > > > 5. Above step failed with error: > > make[4]: /bin/sh: Argument list too long > > make[4]: *** [/buildarea2/cli10/tmp/linux/tools/build/Makefile.build > :148: > /tmp/01234567890123456789/0123456789012345678901234567890123456789/0123456789012345678901234567890123456789/012345678901234567890123456789/01234567890123456789/012345678901234567890123456789/01234567890123456789012345678/9012345678901234567890123456789/012345678901234567890123456789/012345678901234567890123456789/01234567890123456789012345678901234567890123456789012345678901234567890123/perf-1.0/util/perf-util-in.o] > Error 127 > > make[3]: *** [/buildarea2/cli10/tmp/linux/tools/build/Makefile.build > :142: > util] Error 2 > > make[2]: *** [Makefile.perf:797: > /tmp/01234567890123456789/0123456789012345678901234567890123456789/0123456789012345678901234567890123456789/012345678901234567890123456789/01234567890123456789/012345678901234567890123456789/01234567890123456789012345678/9012345678901234567890123456789/012345678901234567890123456789/012345678901234567890123456789/01234567890123456789012345678901234567890123456789012345678901234567890123/perf-1.0/perf-util-in.o] > Error 2 > > > Regards > > Changqing >>> --- >>>   tools/build/Makefile.build | 6 ++++-- >>>   1 file changed, 4 insertions(+), 2 deletions(-) >>> >>> diff --git a/tools/build/Makefile.build b/tools/build/Makefile.build >>> index 3584ff308607..39066a3ef2fc 100644 >>> --- a/tools/build/Makefile.build >>> +++ b/tools/build/Makefile.build >>> @@ -70,11 +70,13 @@ quiet_cmd_gen = GEN     $@ >>>   # If there's nothing to link, create empty $@ object. >>>   quiet_cmd_ld_multi = LD      $@ >>>         cmd_ld_multi = $(if $(strip $(obj-y)),\ >>> -                     $(LD) -r -o $@  $(filter $(obj-y),$^),rm -f >>> $@; $(AR) rcs $@) >>> +                     printf "$(objprefix)%s " $(patsubst >>> $(objprefix)%,%,$(filter $(obj-y),$^)) | \ >>> +                     xargs $(LD) -r -o $@,rm -f $@; $(AR) rcs $@) >>> >>>   quiet_cmd_host_ld_multi = HOSTLD  $@ >>>         cmd_host_ld_multi = $(if $(strip $(obj-y)),\ >>> -                          $(HOSTLD) -r -o $@  $(filter >>> $(obj-y),$^),rm -f $@; $(HOSTAR) rcs $@) >>> +                          printf "$(objprefix)%s " $(patsubst >>> $(objprefix)%,%,$(filter $(obj-y),$^)) | \ >>> +                          xargs $(HOSTLD) -r -o $@,rm -f $@; >>> $(HOSTAR) rcs $@) >>> >>>   ifneq ($(filter $(obj),$(hostprogs)),) >>>     host = host_ >>> -- >>> 2.34.1 >>>