Re: [PATCH v2 15/16] objtool/powerpc: Enable objtool to be built on ppc

[Christophe Leroy]

Le 04/02/2023 à 12:55, Christophe Leroy a écrit :
> Hi,
>
> Le 04/02/2023 à 09:30, Randy Dunlap a écrit :
> > On 2/4/23 00:21, Randy Dunlap wrote:
> > > On 2/4/23 00:19, Randy Dunlap wrote:
> > > > Hi--
> > > >
> > > > On 8/29/22 23:41, Christophe Leroy wrote:
> > > > > Le 29/08/2022 à 07:52, Sathvika Vasireddy a écrit :
> > > > > > This patch adds [stub] implementations for required
> > > > > > functions, inorder to enable objtool build on powerpc.
> > > > >
> > > > > Not all powerpc it seems, see below
> > > >
> > > > When cross-compiling PPC32 (on x86_64), I get 3600+ of these:
> > > >
> > > > /bin/sh: line 1: ./tools/objtool/objtool: No such file or directory
> > > > /bin/sh: line 1: ./tools/objtool/objtool: No such file or directory
> > > > /bin/sh: line 1: ./tools/objtool/objtool: No such file or directory
> > > >
> > > > Is there some way that objtool should work when cross-compiling?
> > >
> > > Oops. Its build failed. I seem to be missing header file(s)
> > > and possibly a library.
> > > I'll check on those...
> >
> > It's complaining about libelf.h but I have that, so I don't know where
> > it is looking other than /usr/include/libelf.h, which exists.
> > Maybe the tool isn't setup (ready) for cross-compiling?
> >
> >
> > Here's the build output for objtool:
> >
> > <stdin>:1:10: fatal error: libelf.h: No such file or directory
> > compilation terminated.
> > elf.c: In function ‘read_sections’:
> > elf.c:273:9: error: ‘elf_getshnum’ is deprecated 
> > [-Werror=deprecated-declarations]
> >    273 |         if (elf_getshdrnum(elf->elf, &sections_nr)) {
> >        |         ^~
> > In file included from /usr/include/gelf.h:32,
> >                   from 
> > /work/lnx/next/linux-next-20230203/tools/objtool/include/objtool/elf.h:10,
> >                   from elf.c:22:
> > /usr/include/libelf.h:310:12: note: declared here
> >    310 | extern int elf_getshnum (Elf *__elf, size_t *__dst)
> >        |            ^~~~~~~~~~~~
> > elf.c:278:9: error: ‘elf_getshstrndx’ is deprecated 
> > [-Werror=deprecated-declarations]
> >    278 |         if (elf_getshdrstrndx(elf->elf, &shstrndx)) {
> >        |         ^~
> > /usr/include/libelf.h:322:12: note: declared here
> >    322 | extern int elf_getshstrndx (Elf *__elf, size_t *__dst)
> >        |            ^~~~~~~~~~~~~~~
> > cc1: all warnings being treated as errors
> > make[4]: *** 
> > [/work/lnx/next/linux-next-20230203/tools/build/Makefile.build:96: 
> > /work/lnx/next/linux-next-20230203/PPC32/tools/objtool/elf.o] Error 1
> >
> > make[3]: *** [Makefile:66: 
> > /work/lnx/next/linux-next-20230203/PPC32/tools/objtool/objtool-in.o] 
> > Error 2
>
> I have no problem crossbuilding for PPC32 from x86_64, I have a fedora 
> 36 on the x86.
>
> $ rpm -q -f /usr/include/libelf.h
> elfutils-libelf-devel-0.187-4.fc36.x86_64
>
> Here is build output with V=1, pmac32_defconfig + CONFIG_FUNCTION_TRACER=y
>
> ...
> mkdir -p ./tools
> make LDFLAGS= MAKEFLAGS=" " O=/home/chleroy/linux-powerpc subdir=tools 
> -C ./tools/ objtool
> mkdir -p /home/chleroy/linux-powerpc/tools/objtool && make 
> O=/home/chleroy/linux-powerpc subdir=tools/objtool --no-print-directory 
> -C objtool
> make -C /home/chleroy/linux-powerpc/tools/build CFLAGS= LDFLAGS= 
> /home/chleroy/linux-powerpc/tools/objtool/fixdep
> make -f /home/chleroy/linux-powerpc/tools/build/Makefile.build dir=. 
> obj=fixdep
>    gcc -Wp,-MD,/home/chleroy/linux-powerpc/tools/objtool/.fixdep.o.d 
> -Wp,-MT,/home/chleroy/linux-powerpc/tools/objtool/fixdep.o 
> -D"BUILD_STR(s)=#s"   -c -o 
> /home/chleroy/linux-powerpc/tools/objtool/fixdep.o fixdep.c
>     ld -r -o /home/chleroy/linux-powerpc/tools/objtool/fixdep-in.o 
> /home/chleroy/linux-powerpc/tools/objtool/fixdep.o
> gcc   -o /home/chleroy/linux-powerpc/tools/objtool/fixdep 
> /home/chleroy/linux-powerpc/tools/objtool/fixdep-in.o
> make -C /home/chleroy/linux-powerpc/tools/lib/subcmd/ 
> OUTPUT=/home/chleroy/linux-powerpc/tools/objtool/
> make -C /home/chleroy/linux-powerpc/tools/build CFLAGS= LDFLAGS= 
> /home/chleroy/linux-powerpc/tools/objtool/fixdep
> make -f /home/chleroy/linux-powerpc/tools/build/Makefile.build dir=. 
> obj=fixdep
>    gcc -Wp,-MD,/home/chleroy/linux-powerpc/tools/objtool/.exec-cmd.o.d 
> -Wp,-MT,/home/chleroy/linux-powerpc/tools/objtool/exec-cmd.o -ggdb3 
> -Wall -Wextra -std=gnu99 -fPIC -O6 -Werror -D_LARGEFILE64_SOURCE 
> -D_FILE_OFFSET_BITS=64 -D_GNU_SOURCE 
> -I/home/chleroy/linux-powerpc/tools/include/ -Wbad-function-cast 
> -Wdeclaration-after-statement -Wformat-security -Wformat-y2k -Winit-self 
> -Wmissing-declarations -Wmissing-prototypes -Wnested-externs 
> -Wno-system-headers -Wold-style-definition -Wpacked -Wredundant-decls 
> -Wstrict-prototypes -Wswitch-default -Wswitch-enum -Wundef 
> -Wwrite-strings -Wformat -Wno-type-limits -Wstrict-aliasing=3 -Wshadow 
> -D"BUILD_STR(s)=#s" -c -o 
> /home/chleroy/linux-powerpc/tools/objtool/exec-cmd.o exec-cmd.c
>    gcc -Wp,-MD,/home/chleroy/linux-powerpc/tools/objtool/.help.o.d 
> -Wp,-MT,/home/chleroy/linux-powerpc/tools/objtool/help.o -ggdb3 -Wall 
> -Wextra -std=gnu99 -fPIC -O6 -Werror -D_LARGEFILE64_SOURCE 
> -D_FILE_OFFSET_BITS=64 -D_GNU_SOURCE 
> -I/home/chleroy/linux-powerpc/tools/include/ -Wbad-function-cast 
> -Wdeclaration-after-statement -Wformat-security -Wformat-y2k -Winit-self 
> -Wmissing-declarations -Wmissing-prototypes -Wnested-externs 
> -Wno-system-headers -Wold-style-definition -Wpacked -Wredundant-decls 
> -Wstrict-prototypes -Wswitch-default -Wswitch-enum -Wundef 
> -Wwrite-strings -Wformat -Wno-type-limits -Wstrict-aliasing=3 -Wshadow 
> -D"BUILD_STR(s)=#s" -c -o 
> /home/chleroy/linux-powerpc/tools/objtool/help.o help.c
>    gcc -Wp,-MD,/home/chleroy/linux-powerpc/tools/objtool/.pager.o.d 
> -Wp,-MT,/home/chleroy/linux-powerpc/tools/objtool/pager.o -ggdb3 -Wall 
> -Wextra -std=gnu99 -fPIC -O6 -Werror -D_LARGEFILE64_SOURCE 
> -D_FILE_OFFSET_BITS=64 -D_GNU_SOURCE 
> -I/home/chleroy/linux-powerpc/tools/include/ -Wbad-function-cast 
> -Wdeclaration-after-statement -Wformat-security -Wformat-y2k -Winit-self 
> -Wmissing-declarations -Wmissing-prototypes -Wnested-externs 
> -Wno-system-headers -Wold-style-definition -Wpacked -Wredundant-decls 
> -Wstrict-prototypes -Wswitch-default -Wswitch-enum -Wundef 
> -Wwrite-strings -Wformat -Wno-type-limits -Wstrict-aliasing=3 -Wshadow 
> -D"BUILD_STR(s)=#s" -c -o 
> /home/chleroy/linux-powerpc/tools/objtool/pager.o pager.c
>    gcc 
> -Wp,-MD,/home/chleroy/linux-powerpc/tools/objtool/.parse-options.o.d 
> -Wp,-MT,/home/chleroy/linux-powerpc/tools/objtool/parse-options.o -ggdb3 
> -Wall -Wextra -std=gnu99 -fPIC -O6 -Werror -D_LARGEFILE64_SOURCE 
> -D_FILE_OFFSET_BITS=64 -D_GNU_SOURCE 
> -I/home/chleroy/linux-powerpc/tools/include/ -Wbad-function-cast 
> -Wdeclaration-after-statement -Wformat-security -Wformat-y2k -Winit-self 
> -Wmissing-declarations -Wmissing-prototypes -Wnested-externs 
> -Wno-system-headers -Wold-style-definition -Wpacked -Wredundant-decls 
> -Wstrict-prototypes -Wswitch-default -Wswitch-enum -Wundef 
> -Wwrite-strings -Wformat -Wno-type-limits -Wstrict-aliasing=3 -Wshadow 
> -D"BUILD_STR(s)=#s" -c -o 
> /home/chleroy/linux-powerpc/tools/objtool/parse-options.o parse-options.c
>    gcc 
> -Wp,-MD,/home/chleroy/linux-powerpc/tools/objtool/.run-command.o.d 
> -Wp,-MT,/home/chleroy/linux-powerpc/tools/objtool/run-command.o -ggdb3 
> -Wall -Wextra -std=gnu99 -fPIC -O6 -Werror -D_LARGEFILE64_SOURCE 
> -D_FILE_OFFSET_BITS=64 -D_GNU_SOURCE 
> -I/home/chleroy/linux-powerpc/tools/include/ -Wbad-function-cast 
> -Wdeclaration-after-statement -Wformat-security -Wformat-y2k -Winit-self 
> -Wmissing-declarations -Wmissing-prototypes -Wnested-externs 
> -Wno-system-headers -Wold-style-definition -Wpacked -Wredundant-decls 
> -Wstrict-prototypes -Wswitch-default -Wswitch-enum -Wundef 
> -Wwrite-strings -Wformat -Wno-type-limits -Wstrict-aliasing=3 -Wshadow 
> -D"BUILD_STR(s)=#s" -c -o 
> /home/chleroy/linux-powerpc/tools/objtool/run-command.o run-command.c
>    gcc -Wp,-MD,/home/chleroy/linux-powerpc/tools/objtool/.sigchain.o.d 
> -Wp,-MT,/home/chleroy/linux-powerpc/tools/objtool/sigchain.o -ggdb3 
> -Wall -Wextra -std=gnu99 -fPIC -O6 -Werror -D_LARGEFILE64_SOURCE 
> -D_FILE_OFFSET_BITS=64 -D_GNU_SOURCE 
> -I/home/chleroy/linux-powerpc/tools/include/ -Wbad-function-cast 
> -Wdeclaration-after-statement -Wformat-security -Wformat-y2k -Winit-self 
> -Wmissing-declarations -Wmissing-prototypes -Wnested-externs 
> -Wno-system-headers -Wold-style-definition -Wpacked -Wredundant-decls 
> -Wstrict-prototypes -Wswitch-default -Wswitch-enum -Wundef 
> -Wwrite-strings -Wformat -Wno-type-limits -Wstrict-aliasing=3 -Wshadow 
> -D"BUILD_STR(s)=#s" -c -o 
> /home/chleroy/linux-powerpc/tools/objtool/sigchain.o sigchain.c
>     ld -r -o /home/chleroy/linux-powerpc/tools/objtool/libsubcmd-in.o 
> /home/chleroy/linux-powerpc/tools/objtool/exec-cmd.o 
> /home/chleroy/linux-powerpc/tools/objtool/help.o 
> /home/chleroy/linux-powerpc/tools/objtool/pager.o 
> /home/chleroy/linux-powerpc/tools/objtool/parse-options.o 
> /home/chleroy/linux-powerpc/tools/objtool/run-command.o 
> /home/chleroy/linux-powerpc/tools/objtool/sigchain.o 
> /home/chleroy/linux-powerpc/tools/objtool/subcmd-config.o
> rm -f /home/chleroy/linux-powerpc/tools/objtool/libsubcmd.a && ar rcs 
> /home/chleroy/linux-powerpc/tools/objtool/libsubcmd.a 
> /home/chleroy/linux-powerpc/tools/objtool/libsubcmd-in.o
> make -f /home/chleroy/linux-powerpc/tools/build/Makefile.build 
> dir=./arch/powerpc obj=objtool
>    gcc 
> -Wp,-MD,/home/chleroy/linux-powerpc/tools/objtool/arch/powerpc/.decode.o.d -Wp,-MT,/home/chleroy/linux-powerpc/tools/objtool/arch/powerpc/decode.o -Werror -Wbad-function-cast -Wdeclaration-after-statement -Wformat-security -Wformat-y2k -Winit-self -Wmissing-declarations -Wmissing-prototypes -Wnested-externs -Wno-system-headers -Wold-style-definition -Wpacked -Wredundant-decls -Wstrict-prototypes -Wswitch-default -Wswitch-enum -Wundef -Wwrite-strings -Wformat -Wno-type-limits -Wstrict-aliasing=3 -Wshadow -Wno-switch-default -Wno-switch-enum -Wno-packed -Wno-nested-externs -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer -std=gnu11 -Wdeclaration-after-statement -g -I/home/chleroy/linux-powerpc/tools/include -I/home/chleroy/linux-powerpc/tools/arch/x86/include/uapi -I/home/chleroy/linux-powerpc/tools/arch/powerpc/include -I/home/chleroy/linux-powerpc/tools/objtool/include -I/home/chleroy/linux-powerpc/tools/objtool/arch/powerpc/include -I/home/chleroy/linux-powerpc/tools/lib -D"BUILD_STR(s)=#s" -c -o /home/chleroy/linux-powerpc/tools/objtool/arch/powerpc/decode.o arch/powerpc/decode.c
>    gcc 
> -Wp,-MD,/home/chleroy/linux-powerpc/tools/objtool/arch/powerpc/.special.o.d -Wp,-MT,/home/chleroy/linux-powerpc/tools/objtool/arch/powerpc/special.o -Werror -Wbad-function-cast -Wdeclaration-after-statement -Wformat-security -Wformat-y2k -Winit-self -Wmissing-declarations -Wmissing-prototypes -Wnested-externs -Wno-system-headers -Wold-style-definition -Wpacked -Wredundant-decls -Wstrict-prototypes -Wswitch-default -Wswitch-enum -Wundef -Wwrite-strings -Wformat -Wno-type-limits -Wstrict-aliasing=3 -Wshadow -Wno-switch-default -Wno-switch-enum -Wno-packed -Wno-nested-externs -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer -std=gnu11 -Wdeclaration-after-statement -g -I/home/chleroy/linux-powerpc/tools/include -I/home/chleroy/linux-powerpc/tools/arch/x86/include/uapi -I/home/chleroy/linux-powerpc/tools/arch/powerpc/include -I/home/chleroy/linux-powerpc/tools/objtool/include -I/home/chleroy/linux-powerpc/tools/objtool/arch/powerpc/include -I/home/chleroy/linux-powerpc/tools/lib -D"BUILD_STR(s)=#s" -c -o /home/chleroy/linux-powerpc/tools/objtool/arch/powerpc/special.o arch/powerpc/special.c
>     ld -r -o 
> /home/chleroy/linux-powerpc/tools/objtool/arch/powerpc/objtool-in.o 
> /home/chleroy/linux-powerpc/tools/objtool/arch/powerpc/decode.o 
> /home/chleroy/linux-powerpc/tools/objtool/arch/powerpc/special.o
>    gcc -Wp,-MD,/home/chleroy/linux-powerpc/tools/objtool/.weak.o.d 
> -Wp,-MT,/home/chleroy/linux-powerpc/tools/objtool/weak.o -Werror 
> -Wbad-function-cast -Wdeclaration-after-statement -Wformat-security 
> -Wformat-y2k -Winit-self -Wmissing-declarations -Wmissing-prototypes 
> -Wnested-externs -Wno-system-headers -Wold-style-definition -Wpacked 
> -Wredundant-decls -Wstrict-prototypes -Wswitch-default -Wswitch-enum 
> -Wundef -Wwrite-strings -Wformat -Wno-type-limits -Wstrict-aliasing=3 
> -Wshadow -Wno-switch-default -Wno-switch-enum -Wno-packed 
> -Wno-nested-externs -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 
> -fomit-frame-pointer -std=gnu11 -Wdeclaration-after-statement -g 
> -I/home/chleroy/linux-powerpc/tools/include 
> -I/home/chleroy/linux-powerpc/tools/arch/x86/include/uapi 
> -I/home/chleroy/linux-powerpc/tools/arch/powerpc/include 
> -I/home/chleroy/linux-powerpc/tools/objtool/include 
> -I/home/chleroy/linux-powerpc/tools/objtool/arch/powerpc/include 
> -I/home/chleroy/linux-powerpc/tools/lib -D"BUILD_STR(s)=#s" -c -o 
> /home/chleroy/linux-powerpc/tools/objtool/weak.o weak.c
>    gcc -Wp,-MD,/home/chleroy/linux-powerpc/tools/objtool/.check.o.d 
> -Wp,-MT,/home/chleroy/linux-powerpc/tools/objtool/check.o -Werror 
> -Wbad-function-cast -Wdeclaration-after-statement -Wformat-security 
> -Wformat-y2k -Winit-self -Wmissing-declarations -Wmissing-prototypes 
> -Wnested-externs -Wno-system-headers -Wold-style-definition -Wpacked 
> -Wredundant-decls -Wstrict-prototypes -Wswitch-default -Wswitch-enum 
> -Wundef -Wwrite-strings -Wformat -Wno-type-limits -Wstrict-aliasing=3 
> -Wshadow -Wno-switch-default -Wno-switch-enum -Wno-packed 
> -Wno-nested-externs -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 
> -fomit-frame-pointer -std=gnu11 -Wdeclaration-after-statement -g 
> -I/home/chleroy/linux-powerpc/tools/include 
> -I/home/chleroy/linux-powerpc/tools/arch/x86/include/uapi 
> -I/home/chleroy/linux-powerpc/tools/arch/powerpc/include 
> -I/home/chleroy/linux-powerpc/tools/objtool/include 
> -I/home/chleroy/linux-powerpc/tools/objtool/arch/powerpc/include 
> -I/home/chleroy/linux-powerpc/tools/lib -D"BUILD_STR(s)=#s" -c -o 
> /home/chleroy/linux-powerpc/tools/objtool/check.o check.c
>    gcc -Wp,-MD,/home/chleroy/linux-powerpc/tools/objtool/.special.o.d 
> -Wp,-MT,/home/chleroy/linux-powerpc/tools/objtool/special.o -Werror 
> -Wbad-function-cast -Wdeclaration-after-statement -Wformat-security 
> -Wformat-y2k -Winit-self -Wmissing-declarations -Wmissing-prototypes 
> -Wnested-externs -Wno-system-headers -Wold-style-definition -Wpacked 
> -Wredundant-decls -Wstrict-prototypes -Wswitch-default -Wswitch-enum 
> -Wundef -Wwrite-strings -Wformat -Wno-type-limits -Wstrict-aliasing=3 
> -Wshadow -Wno-switch-default -Wno-switch-enum -Wno-packed 
> -Wno-nested-externs -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 
> -fomit-frame-pointer -std=gnu11 -Wdeclaration-after-statement -g 
> -I/home/chleroy/linux-powerpc/tools/include 
> -I/home/chleroy/linux-powerpc/tools/arch/x86/include/uapi 
> -I/home/chleroy/linux-powerpc/tools/arch/powerpc/include 
> -I/home/chleroy/linux-powerpc/tools/objtool/include 
> -I/home/chleroy/linux-powerpc/tools/objtool/arch/powerpc/include 
> -I/home/chleroy/linux-powerpc/tools/lib -D"BUILD_STR(s)=#s" -c -o 
> /home/chleroy/linux-powerpc/tools/objtool/special.o special.c
>    gcc 
> -Wp,-MD,/home/chleroy/linux-powerpc/tools/objtool/.builtin-check.o.d 
> -Wp,-MT,/home/chleroy/linux-powerpc/tools/objtool/builtin-check.o 
> -Werror -Wbad-function-cast -Wdeclaration-after-statement 
> -Wformat-security -Wformat-y2k -Winit-self -Wmissing-declarations 
> -Wmissing-prototypes -Wnested-externs -Wno-system-headers 
> -Wold-style-definition -Wpacked -Wredundant-decls -Wstrict-prototypes 
> -Wswitch-default -Wswitch-enum -Wundef -Wwrite-strings -Wformat 
> -Wno-type-limits -Wstrict-aliasing=3 -Wshadow -Wno-switch-default 
> -Wno-switch-enum -Wno-packed -Wno-nested-externs -Wall 
> -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer 
> -std=gnu11 -Wdeclaration-after-statement -g 
> -I/home/chleroy/linux-powerpc/tools/include 
> -I/home/chleroy/linux-powerpc/tools/arch/x86/include/uapi 
> -I/home/chleroy/linux-powerpc/tools/arch/powerpc/include 
> -I/home/chleroy/linux-powerpc/tools/objtool/include 
> -I/home/chleroy/linux-powerpc/tools/objtool/arch/powerpc/include 
> -I/home/chleroy/linux-powerpc/tools/lib -D"BUILD_STR(s)=#s" -c -o 
> /home/chleroy/linux-powerpc/tools/objtool/builtin-check.o builtin-check.c
>    gcc -Wp,-MD,/home/chleroy/linux-powerpc/tools/objtool/.elf.o.d 
> -Wp,-MT,/home/chleroy/linux-powerpc/tools/objtool/elf.o -Werror 
> -Wbad-function-cast -Wdeclaration-after-statement -Wformat-security 
> -Wformat-y2k -Winit-self -Wmissing-declarations -Wmissing-prototypes 
> -Wnested-externs -Wno-system-headers -Wold-style-definition -Wpacked 
> -Wredundant-decls -Wstrict-prototypes -Wswitch-default -Wswitch-enum 
> -Wundef -Wwrite-strings -Wformat -Wno-type-limits -Wstrict-aliasing=3 
> -Wshadow -Wno-switch-default -Wno-switch-enum -Wno-packed 
> -Wno-nested-externs -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 
> -fomit-frame-pointer -std=gnu11 -Wdeclaration-after-statement -g 
> -I/home/chleroy/linux-powerpc/tools/include 
> -I/home/chleroy/linux-powerpc/tools/arch/x86/include/uapi 
> -I/home/chleroy/linux-powerpc/tools/arch/powerpc/include 
> -I/home/chleroy/linux-powerpc/tools/objtool/include 
> -I/home/chleroy/linux-powerpc/tools/objtool/arch/powerpc/include 
> -I/home/chleroy/linux-powerpc/tools/lib -D"BUILD_STR(s)=#s" -c -o 
> /home/chleroy/linux-powerpc/tools/objtool/elf.o elf.c
>    gcc -Wp,-MD,/home/chleroy/linux-powerpc/tools/objtool/.objtool.o.d 
> -Wp,-MT,/home/chleroy/linux-powerpc/tools/objtool/objtool.o -Werror 
> -Wbad-function-cast -Wdeclaration-after-statement -Wformat-security 
> -Wformat-y2k -Winit-self -Wmissing-declarations -Wmissing-prototypes 
> -Wnested-externs -Wno-system-headers -Wold-style-definition -Wpacked 
> -Wredundant-decls -Wstrict-prototypes -Wswitch-default -Wswitch-enum 
> -Wundef -Wwrite-strings -Wformat -Wno-type-limits -Wstrict-aliasing=3 
> -Wshadow -Wno-switch-default -Wno-switch-enum -Wno-packed 
> -Wno-nested-externs -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 
> -fomit-frame-pointer -std=gnu11 -Wdeclaration-after-statement -g 
> -I/home/chleroy/linux-powerpc/tools/include 
> -I/home/chleroy/linux-powerpc/tools/arch/x86/include/uapi 
> -I/home/chleroy/linux-powerpc/tools/arch/powerpc/include 
> -I/home/chleroy/linux-powerpc/tools/objtool/include 
> -I/home/chleroy/linux-powerpc/tools/objtool/arch/powerpc/include 
> -I/home/chleroy/linux-powerpc/tools/lib -D"BUILD_STR(s)=#s" -c -o 
> /home/chleroy/linux-powerpc/tools/objtool/objtool.o objtool.c
>    gcc -Wp,-MD,/home/chleroy/linux-powerpc/tools/objtool/.libstring.o.d 
> -Wp,-MT,/home/chleroy/linux-powerpc/tools/objtool/libstring.o -Werror 
> -Wbad-function-cast -Wdeclaration-after-statement -Wformat-security 
> -Wformat-y2k -Winit-self -Wmissing-declarations -Wmissing-prototypes 
> -Wnested-externs -Wno-system-headers -Wold-style-definition -Wpacked 
> -Wredundant-decls -Wstrict-prototypes -Wswitch-default -Wswitch-enum 
> -Wundef -Wwrite-strings -Wformat -Wno-type-limits -Wstrict-aliasing=3 
> -Wshadow -Wno-switch-default -Wno-switch-enum -Wno-packed 
> -Wno-nested-externs -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 
> -fomit-frame-pointer -std=gnu11 -Wdeclaration-after-statement -g 
> -I/home/chleroy/linux-powerpc/tools/include 
> -I/home/chleroy/linux-powerpc/tools/arch/x86/include/uapi 
> -I/home/chleroy/linux-powerpc/tools/arch/powerpc/include 
> -I/home/chleroy/linux-powerpc/tools/objtool/include 
> -I/home/chleroy/linux-powerpc/tools/objtool/arch/powerpc/include 
> -I/home/chleroy/linux-powerpc/tools/lib -D"BUILD_STR(s)=#s" -c -o 
> /home/chleroy/linux-powerpc/tools/objtool/libstring.o ../lib/string.c
>    gcc -Wp,-MD,/home/chleroy/linux-powerpc/tools/objtool/.libctype.o.d 
> -Wp,-MT,/home/chleroy/linux-powerpc/tools/objtool/libctype.o -Werror 
> -Wbad-function-cast -Wdeclaration-after-statement -Wformat-security 
> -Wformat-y2k -Winit-self -Wmissing-declarations -Wmissing-prototypes 
> -Wnested-externs -Wno-system-headers -Wold-style-definition -Wpacked 
> -Wredundant-decls -Wstrict-prototypes -Wswitch-default -Wswitch-enum 
> -Wundef -Wwrite-strings -Wformat -Wno-type-limits -Wstrict-aliasing=3 
> -Wshadow -Wno-switch-default -Wno-switch-enum -Wno-packed 
> -Wno-nested-externs -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 
> -fomit-frame-pointer -std=gnu11 -Wdeclaration-after-statement -g 
> -I/home/chleroy/linux-powerpc/tools/include 
> -I/home/chleroy/linux-powerpc/tools/arch/x86/include/uapi 
> -I/home/chleroy/linux-powerpc/tools/arch/powerpc/include 
> -I/home/chleroy/linux-powerpc/tools/objtool/include 
> -I/home/chleroy/linux-powerpc/tools/objtool/arch/powerpc/include 
> -I/home/chleroy/linux-powerpc/tools/lib -D"BUILD_STR(s)=#s" -c -o 
> /home/chleroy/linux-powerpc/tools/objtool/libctype.o ../lib/ctype.c
>    gcc 
> -Wp,-MD,/home/chleroy/linux-powerpc/tools/objtool/.str_error_r.o.d 
> -Wp,-MT,/home/chleroy/linux-powerpc/tools/objtool/str_error_r.o -Werror 
> -Wbad-function-cast -Wdeclaration-after-statement -Wformat-security 
> -Wformat-y2k -Winit-self -Wmissing-declarations -Wmissing-prototypes 
> -Wnested-externs -Wno-system-headers -Wold-style-definition -Wpacked 
> -Wredundant-decls -Wstrict-prototypes -Wswitch-default -Wswitch-enum 
> -Wundef -Wwrite-strings -Wformat -Wno-type-limits -Wstrict-aliasing=3 
> -Wshadow -Wno-switch-default -Wno-switch-enum -Wno-packed 
> -Wno-nested-externs -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 
> -fomit-frame-pointer -std=gnu11 -Wdeclaration-after-statement -g 
> -I/home/chleroy/linux-powerpc/tools/include 
> -I/home/chleroy/linux-powerpc/tools/arch/x86/include/uapi 
> -I/home/chleroy/linux-powerpc/tools/arch/powerpc/include 
> -I/home/chleroy/linux-powerpc/tools/objtool/include 
> -I/home/chleroy/linux-powerpc/tools/objtool/arch/powerpc/include 
> -I/home/chleroy/linux-powerpc/tools/lib -D"BUILD_STR(s)=#s" -c -o 
> /home/chleroy/linux-powerpc/tools/objtool/str_error_r.o 
> ../lib/str_error_r.c
>    gcc -Wp,-MD,/home/chleroy/linux-powerpc/tools/objtool/.librbtree.o.d 
> -Wp,-MT,/home/chleroy/linux-powerpc/tools/objtool/librbtree.o -Werror 
> -Wbad-function-cast -Wdeclaration-after-statement -Wformat-security 
> -Wformat-y2k -Winit-self -Wmissing-declarations -Wmissing-prototypes 
> -Wnested-externs -Wno-system-headers -Wold-style-definition -Wpacked 
> -Wredundant-decls -Wstrict-prototypes -Wswitch-default -Wswitch-enum 
> -Wundef -Wwrite-strings -Wformat -Wno-type-limits -Wstrict-aliasing=3 
> -Wshadow -Wno-switch-default -Wno-switch-enum -Wno-packed 
> -Wno-nested-externs -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 
> -fomit-frame-pointer -std=gnu11 -Wdeclaration-after-statement -g 
> -I/home/chleroy/linux-powerpc/tools/include 
> -I/home/chleroy/linux-powerpc/tools/arch/x86/include/uapi 
> -I/home/chleroy/linux-powerpc/tools/arch/powerpc/include 
> -I/home/chleroy/linux-powerpc/tools/objtool/include 
> -I/home/chleroy/linux-powerpc/tools/objtool/arch/powerpc/include 
> -I/home/chleroy/linux-powerpc/tools/lib -D"BUILD_STR(s)=#s" -c -o 
> /home/chleroy/linux-powerpc/tools/objtool/librbtree.o ../lib/rbtree.c
>     ld -r -o /home/chleroy/linux-powerpc/tools/objtool/objtool-in.o 
> /home/chleroy/linux-powerpc/tools/objtool/arch/powerpc/objtool-in.o 
> /home/chleroy/linux-powerpc/tools/objtool/weak.o 
> /home/chleroy/linux-powerpc/tools/objtool/check.o 
> /home/chleroy/linux-powerpc/tools/objtool/special.o 
> /home/chleroy/linux-powerpc/tools/objtool/builtin-check.o 
> /home/chleroy/linux-powerpc/tools/objtool/elf.o 
> /home/chleroy/linux-powerpc/tools/objtool/objtool.o 
> /home/chleroy/linux-powerpc/tools/objtool/libstring.o 
> /home/chleroy/linux-powerpc/tools/objtool/libctype.o 
> /home/chleroy/linux-powerpc/tools/objtool/str_error_r.o 
> /home/chleroy/linux-powerpc/tools/objtool/librbtree.o
> gcc /home/chleroy/linux-powerpc/tools/objtool/objtool-in.o -lelf 
> /home/chleroy/linux-powerpc/tools/objtool/libsubcmd.a   -o 
> /home/chleroy/linux-powerpc/tools/objtool/objtool
> ...
> make -f ./scripts/Makefile.build obj=. need-builtin=1 need-modorder=1
> make -f ./scripts/Makefile.build obj=init \
> need-builtin=1 \
> need-modorder=1 \
>
>    powerpc64-linux-gcc -Wp,-MMD,init/.main.o.d -nostdinc 
> -I./arch/powerpc/include -I./arch/powerpc/include/generated  -I./include 
> -I./arch/powerpc/include/uapi -I./arch/powerpc/include/generated/uapi 
> -I./include/uapi -I./include/generated/uapi -include 
> ./include/linux/compiler-version.h -include ./include/linux/kconfig.h 
> -include ./include/linux/compiler_types.h -D__KERNEL__ -I ./arch/powerpc 
> -fmacro-prefix-map=./= -Wall -Wundef -Werror=strict-prototypes 
> -Wno-trigraphs -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE 
> -Werror=implicit-function-declaration -Werror=implicit-int 
> -Werror=return-type -Wno-format-security -funsigned-char -std=gnu11 
> -mbig-endian -m32 -msoft-float -pipe -ffixed-r2 -mmultiple 
> -mno-readonly-in-sdata -mcpu=powerpc -mno-prefixed -mno-pcrel 
> -mno-altivec -mno-vsx -mno-mma -fno-asynchronous-unwind-tables 
> -mno-string -Wa,-maltivec -mbig-endian -mstack-protector-guard=tls 
> -mstack-protector-guard-reg=r2 -fno-delete-null-pointer-checks 
> -Wno-frame-address -Wno-format-truncation -Wno-format-overflow 
> -Wno-address-of-packed-member -O2 -fno-allow-store-data-races 
> -Wframe-larger-than=1024 -fstack-protector-strong -Wno-main 
> -Wno-unused-but-set-variable -Wno-unused-const-variable 
> -Wno-dangling-pointer -ftrivial-auto-var-init=zero 
> -fno-stack-clash-protection -pg -Wdeclaration-after-statement -Wvla 
> -Wno-pointer-sign -Wcast-function-type -Wno-stringop-truncation 
> -Wno-stringop-overflow -Wno-restrict -Wno-maybe-uninitialized 
> -Wno-array-bounds -Wno-alloc-size-larger-than -Wimplicit-fallthrough=5 
> -fno-strict-overflow -fno-stack-check -fconserve-stack -Werror=date-time 
> -Werror=incompatible-pointer-types -Werror=designated-init 
> -Wno-packed-not-aligned -mstack-protector-guard-offset=544 
> -fno-function-sections -fno-data-sections -DKBUILD_MODFILE='"init/main"' 
> -DKBUILD_BASENAME='"main"' -DKBUILD_MODNAME='"main"' 
> -D__KBUILD_MODNAME=kmod_main -c -o init/main.o init/main.c   ; 
> ./tools/objtool/objtool --mcount   init/main.o
>    ./scripts/check-local-export init/main.o
>     { echo ; echo 'init/main.o: $(wildcard ./tools/objtool/objtool)' ; } 
>  >> init/.main.o.cmd
> set -e; mkdir -p init/; trap "rm -f init/.utsversion-tmp.h.tmp" EXIT; { 
> utsver=$(echo '#'""   "" | cut -b -64); echo '#'define UTS_VERSION 
> \""${utsver}"\"; } > init/.utsversion-tmp.h.tmp; if [ ! -r 
> init/utsversion-tmp.h ] || ! cmp -s init/utsversion-tmp.h 
> init/.utsversion-tmp.h.tmp; then : '  UPD     init/utsversion-tmp.h'; mv 
> -f init/.utsversion-tmp.h.tmp init/utsversion-tmp.h; fi
>    powerpc64-linux-gcc -Wp,-MMD,init/.version.o.d -nostdinc 
> -I./arch/powerpc/include -I./arch/powerpc/include/generated  -I./include 
> -I./arch/powerpc/include/uapi -I./arch/powerpc/include/generated/uapi 
> -I./include/uapi -I./include/generated/uapi -include 
> ./include/linux/compiler-version.h -include ./include/linux/kconfig.h 
> -include ./include/linux/compiler_types.h -D__KERNEL__ -I ./arch/powerpc 
> -fmacro-prefix-map=./= -Wall -Wundef -Werror=strict-prototypes 
> -Wno-trigraphs -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE 
> -Werror=implicit-function-declaration -Werror=implicit-int 
> -Werror=return-type -Wno-format-security -funsigned-char -std=gnu11 
> -mbig-endian -m32 -msoft-float -pipe -ffixed-r2 -mmultiple 
> -mno-readonly-in-sdata -mcpu=powerpc -mno-prefixed -mno-pcrel 
> -mno-altivec -mno-vsx -mno-mma -fno-asynchronous-unwind-tables 
> -mno-string -Wa,-maltivec -mbig-endian -mstack-protector-guard=tls 
> -mstack-protector-guard-reg=r2 -fno-delete-null-pointer-checks 
> -Wno-frame-address -Wno-format-truncation -Wno-format-overflow 
> -Wno-address-of-packed-member -O2 -fno-allow-store-data-races 
> -Wframe-larger-than=1024 -fstack-protector-strong -Wno-main 
> -Wno-unused-but-set-variable -Wno-unused-const-variable 
> -Wno-dangling-pointer -ftrivial-auto-var-init=zero 
> -fno-stack-clash-protection -pg -Wdeclaration-after-statement -Wvla 
> -Wno-pointer-sign -Wcast-function-type -Wno-stringop-truncation 
> -Wno-stringop-overflow -Wno-restrict -Wno-maybe-uninitialized 
> -Wno-array-bounds -Wno-alloc-size-larger-than -Wimplicit-fallthrough=5 
> -fno-strict-overflow -fno-stack-check -fconserve-stack -Werror=date-time 
> -Werror=incompatible-pointer-types -Werror=designated-init 
> -Wno-packed-not-aligned -mstack-protector-guard-offset=544 
> -fno-function-sections -fno-data-sections -include init/utsversion-tmp.h 
>     -DKBUILD_MODFILE='"init/version"' -DKBUILD_BASENAME='"version"' 
> -DKBUILD_MODNAME='"version"' -D__KBUILD_MODNAME=kmod_version -c -o 
> init/version.o init/version.c   ; ./tools/objtool/objtool --mcount 
> init/version.o
>    ./scripts/check-local-export init/version.o
>     { echo ; echo 'init/version.o: $(wildcard ./tools/objtool/objtool)' 
> ; } >> init/.version.o.cmd
> ...


Ok, got the same problem as you with next-20230203

  DESCEND objtool
<stdin>:1:10: fatal error: libelf.h: No such file or directory
compilation terminated.
  HOSTCC  /home/chleroy/linux-powerpc/tools/objtool/fixdep.o
  HOSTLD  /home/chleroy/linux-powerpc/tools/objtool/fixdep-in.o
  LINK    /home/chleroy/linux-powerpc/tools/objtool/fixdep
  CC      /home/chleroy/linux-powerpc/tools/objtool/libsubcmd/exec-cmd.o
  CC      /home/chleroy/linux-powerpc/tools/objtool/libsubcmd/help.o
  CC      /home/chleroy/linux-powerpc/tools/objtool/libsubcmd/pager.o
  CC 
/home/chleroy/linux-powerpc/tools/objtool/libsubcmd/parse-options.o
  CC      /home/chleroy/linux-powerpc/tools/objtool/libsubcmd/run-command.o
  CC      /home/chleroy/linux-powerpc/tools/objtool/libsubcmd/sigchain.o
  CC 
/home/chleroy/linux-powerpc/tools/objtool/libsubcmd/subcmd-config.o
  LD 
/home/chleroy/linux-powerpc/tools/objtool/libsubcmd/libsubcmd-in.o
  AR      /home/chleroy/linux-powerpc/tools/objtool/libsubcmd/libsubcmd.a
  INSTALL libsubcmd_headers
  CC      /home/chleroy/linux-powerpc/tools/objtool/arch/powerpc/decode.o
  CC      /home/chleroy/linux-powerpc/tools/objtool/arch/powerpc/special.o
  LD 
/home/chleroy/linux-powerpc/tools/objtool/arch/powerpc/objtool-in.o
  CC      /home/chleroy/linux-powerpc/tools/objtool/weak.o
  CC      /home/chleroy/linux-powerpc/tools/objtool/check.o
  CC      /home/chleroy/linux-powerpc/tools/objtool/special.o
  CC      /home/chleroy/linux-powerpc/tools/objtool/builtin-check.o
  CC      /home/chleroy/linux-powerpc/tools/objtool/elf.o
elf.c: In function 'read_sections':
elf.c:273:9: error: 'elf_getshnum' is deprecated 
[-Werror=deprecated-declarations]
  273 |         if (elf_getshdrnum(elf->elf, &sections_nr)) {
      |         ^~
In file included from /usr/include/gelf.h:32,
                 from 
/home/chleroy/linux-powerpc/tools/objtool/include/objtool/elf.h:10,
                 from elf.c:22:
/usr/include/libelf.h:310:12: note: declared here
  310 | extern int elf_getshnum (Elf *__elf, size_t *__dst)
      |            ^~~~~~~~~~~~
elf.c:278:9: error: 'elf_getshstrndx' is deprecated 
[-Werror=deprecated-declarations]
  278 |         if (elf_getshdrstrndx(elf->elf, &shstrndx)) {
      |         ^~
/usr/include/libelf.h:322:12: note: declared here
  322 | extern int elf_getshstrndx (Elf *__elf, size_t *__dst)
      |            ^~~~~~~~~~~~~~~
cc1: all warnings being treated as errors
make[3]: *** [/home/chleroy/linux-powerpc/tools/build/Makefile.build:97: 
/home/chleroy/linux-powerpc/tools/objtool/elf.o] Error 1
make[2]: *** [Makefile:66: 
/home/chleroy/linux-powerpc/tools/objtool/objtool-in.o] Error 2
make[1]: *** [Makefile:73: objtool] Error 2
make: *** [Makefile:1439: tools/objtool] Error 2


That's odd, because if I do it manually it works:


$ make LDFLAGS= MAKEFLAGS=" " O=/home/chleroy/linux-powerpc subdir=tools 
-C ./tools/ objtool
make : on entre dans le répertoire « /home/chleroy/linux-powerpc/tools »
  DESCEND objtool
  CC      /home/chleroy/linux-powerpc/tools/objtool/libsubcmd/exec-cmd.o
  CC      /home/chleroy/linux-powerpc/tools/objtool/libsubcmd/help.o
  CC      /home/chleroy/linux-powerpc/tools/objtool/libsubcmd/pager.o
  CC 
/home/chleroy/linux-powerpc/tools/objtool/libsubcmd/parse-options.o
  CC      /home/chleroy/linux-powerpc/tools/objtool/libsubcmd/run-command.o
  CC      /home/chleroy/linux-powerpc/tools/objtool/libsubcmd/sigchain.o
  CC 
/home/chleroy/linux-powerpc/tools/objtool/libsubcmd/subcmd-config.o
  LD 
/home/chleroy/linux-powerpc/tools/objtool/libsubcmd/libsubcmd-in.o
  AR      /home/chleroy/linux-powerpc/tools/objtool/libsubcmd/libsubcmd.a
  INSTALL libsubcmd_headers
  CC      /home/chleroy/linux-powerpc/tools/objtool/arch/x86/special.o
  GEN 
/home/chleroy/linux-powerpc/tools/objtool/arch/x86/lib/inat-tables.c
  CC      /home/chleroy/linux-powerpc/tools/objtool/arch/x86/decode.o
  LD      /home/chleroy/linux-powerpc/tools/objtool/arch/x86/objtool-in.o
  CC      /home/chleroy/linux-powerpc/tools/objtool/weak.o
  CC      /home/chleroy/linux-powerpc/tools/objtool/check.o
  CC      /home/chleroy/linux-powerpc/tools/objtool/special.o
  CC      /home/chleroy/linux-powerpc/tools/objtool/builtin-check.o
  CC      /home/chleroy/linux-powerpc/tools/objtool/elf.o
  CC      /home/chleroy/linux-powerpc/tools/objtool/objtool.o
  CC      /home/chleroy/linux-powerpc/tools/objtool/orc_gen.o
  CC      /home/chleroy/linux-powerpc/tools/objtool/orc_dump.o
  CC      /home/chleroy/linux-powerpc/tools/objtool/libstring.o
  CC      /home/chleroy/linux-powerpc/tools/objtool/libctype.o
  CC      /home/chleroy/linux-powerpc/tools/objtool/str_error_r.o
  CC      /home/chleroy/linux-powerpc/tools/objtool/librbtree.o
  LD      /home/chleroy/linux-powerpc/tools/objtool/objtool-in.o
  LINK    /home/chleroy/linux-powerpc/tools/objtool/objtool
make : on quitte le répertoire « /home/chleroy/linux-powerpc/tools »
[chleroy@PO20335 linux-powerpc]$ file 
/home/chleroy/linux-powerpc/tools/objtool/objtool
/home/chleroy/linux-powerpc/tools/objtool/objtool: ELF 64-bit LSB 
executable, x86-64, version 1 (SYSV), dynamically linked, interpreter 
/lib64/ld-linux-x86-64.so.2, 
BuildID[sha1]=1f445df36c222194c5bce8147a30a1fa1120f318, for GNU/Linux 
3.2.0, with debug_info, not stripped


Christophe

Christophe