[flext] Build error related to ld and __stack_chk_guard@@GLIBC_2.17

Fri Aug 12 21:23:50 UTC 2016

Hi Luca,
the autoconf scripts of flext potentially use a different set of compile
options.
Use build.sh also for building flext, or adapt the flags in the autoconf
scripts to include -fPIC.
best, Thomas

2016-08-12 23:20 GMT+02:00 Luca Turchet <tur at create.aau.dk>:

> Hi Thomas,
> I suspect that /usr/local/lib/libflext-pd_s.a has not been compiled with
> -fPIC.
> Is there a way to check this?
>
> I used build.sh, which produce on the command line this output:
>
> g++ -c  -ffast-math -DFLEXT_USE_CMEM -O3 -march=native   -I/usr/include/pd
> -pthread -fPIC -fvisibility-inlines-hidden -DNDEBUG -DFLEXT_SYS=2 -DPD
> -I/usr/local/src/pd/src -I/usr/local/src/pd/include
> -I/usr/local/src/pd/include/pd -I/usr/local/include/stk
> -I/usr/local/include/sndobj -I/usr/local/include/flext main.cpp -o
> pd-linux/release-single/main.opp
>
> Here I can see -fPIC but I can't see the involvement of
> /usr/local/lib/libflext-pd_s.a, so I guess that
> /usr/local/lib/libflext-pd_s.a was compiled when installing flext (I had
> run autoconf)
>
> Best
>
> Luca
>
> ______________________________________________
>
> Luca Turchet, Ph.D.
> Postdoctoral Research Fellow
>
> Department of Architecture, Design & Media Technology
> Aalborg University Copenhagen
> A. C. Meyers Vænge 15
> DK-2450 Copenhagen SV
>
> E-mail: tur at create.aau.dk
> Project Website: www.ahws-project.net
> Personal Website: www.lucaturchet.it
>
> ________________________________________
> From: Thomas Grill [grrrr.org at gmail.com] on behalf of Thomas Grill [
> gr at grrrr.org]
> Sent: Friday, August 12, 2016 10:17 PM
> To: Luca Turchet
> Cc: flext at grrrr.org
> Subject: Re: [flext] Build error related to ld and __stack_chk_guard@
> @GLIBC_2.17
>
> You could try installing clang and see whether this compiler has the same
> problems.
> best, Thomas
>
> --
> Thomas Grill
> http://grrrr.org
>
>
>
> > Am 12.08.2016 um 22:11 schrieb Luca Turchet <tur at create.aau.dk>:
> >
> >
> > Hi Thomas,
> > thanks for your quick reply. I just read your answer, after having sent
> my last post to the list.
> >
> > As you can see from that post, I have already tried using -fPIC in the
> linker command line.
> >
> > "Apart from system libraries there is only -lflext-pd_s . I would
> suppose that this has also been compiled with -fPIC (if you are using the
> flext build system for simple1) but only you can really know that."
> >
> > Yes I have not touched anything in the file gnumake-gcc.inc that is
> launched by build.sh  apart from the line LDFLAGS . So -lflext-pd_s should
> have been compiled properly with -fPIC as the -fPIC option is present in
> the CFLAGS of the same file.
> >
> > Any further suggestion?
> >
> >
> > Luca
> >
> >
> > ______________________________________________
> >
> > Luca Turchet, Ph.D.
> > Postdoctoral Research Fellow
> >
> > Department of Architecture, Design & Media Technology
> > Aalborg University Copenhagen
> > A. C. Meyers Vænge 15
> > DK-2450 Copenhagen SV
> >
> > E-mail: tur at create.aau.dk
> > Project Website: www.ahws-project.net
> > Personal Website: www.lucaturchet.it
> >
> > ________________________________________
> > From: Thomas Grill [grrrr.org at gmail.com] on behalf of Thomas Grill [
> gr at grrrr.org]
> > Sent: Friday, August 12, 2016 10:00 PM
> > To: Luca Turchet
> > Cc: flext at grrrr.org
> > Subject: Re: [flext] Build error related to ld and __stack_chk_guard@
> @GLIBC_2.17
> >
> > Hi Luca,
> > there is not much choice:
> >
> > The compilation is:
> > g++ -L/usr/lib -pthread -shared  -Wl,-S -L/usr/local/src/pd/bin
> -L/usr/local/lib -o pd-linux/release-single/simple1.pd_linux
>  pd-linux/release-single/main.opp  -lflext-pd_s
> >
> > Apart from system libraries there is only -lflext-pd_s . I would suppose
> that this has also been compiled with -fPIC (if you are using the flext
> build system for simple1) but only you can really know that.
> > It's a shot in the dark, but also try adding -fPIC to the linker command
> line...
> >
> > good luck,
> > Thomas
> >
> > --
> > Thomas Grill
> > http://grrrr.org
> >
> >
> >
> >> Am 12.08.2016 um 20:12 schrieb Luca Turchet <tur at create.aau.dk>:
> >>
> >>
> >> Actually reading better the output I can see that it is stated
> "recompile with -fPIC" on the second g++ command
> >> (on the first g++ the option -fPIC was present, I didn't notice that
> there was a second g++).
> >>
> >> So I need to recompile the shared libraries with that option. Can
> anyone suggest me which file should I modify
> >> among all the files involved in the build process?
> >>
> >> Best
> >>
> >> Luca
> >>
> >>
> >>
> >>
> >> ______________________________________________
> >>
> >> Luca Turchet, Ph.D.
> >> Postdoctoral Research Fellow
> >>
> >> Department of Architecture, Design & Media Technology
> >> Aalborg University Copenhagen
> >> A. C. Meyers Vænge 15
> >> DK-2450 Copenhagen SV
> >>
> >> E-mail: tur at create.aau.dk
> >> Project Website: www.ahws-project.net
> >> Personal Website: www.lucaturchet.it
> >> From: flext [flext-bounces at grrrr.org] on behalf of Luca Turchet [
> tur at create.aau.dk]
> >> Sent: Friday, August 12, 2016 7:00 PM
> >> To: flext at grrrr.org
> >> Subject: [flext] Build error related to ld and __stack_chk_guard@
> @GLIBC_2.17
> >>
> >>
> >>
> >> Dear list members,
> >> I am experiencing an error related to ld and __stack_chk_guard@
> @GLIBC_2.17
> >> while building the "simple1" example of the tutorial, on my embedded
> board
> >> ODROID C2 (which is armv8-64 bit) running Ubuntu 16.04.1:
> >>
> >>
> >> g++ -c  -ffast-math -DFLEXT_USE_CMEM -O3 -march=native
>  -I/usr/include/pd -pthread -fPIC -fvisibility-inlines-hidden -DNDEBUG
> -DFLEXT_SYS=2 -DPD -I/usr/local/src/pd/src -I/usr/local/src/pd/include
> -I/usr/local/src/pd/include/pd -I/usr/local/include/stk
> -I/usr/local/include/sndobj -I/usr/local/include/flext main.cpp -o
> pd-linux/release-single/main.opp
> >> g++ -L/usr/lib -pthread -shared  -Wl,-S -L/usr/local/src/pd/bin
> -L/usr/local/lib -o pd-linux/release-single/simple1.pd_linux
>  pd-linux/release-single/main.opp  -lflext-pd_s
> >> /usr/bin/ld: /usr/local/lib/libflext-pd_s.a(libflext_pd_s_la-flxlet.o):
> relocation R_AARCH64_ADR_PREL_PG_HI21 against external symbol
> `__stack_chk_guard@@GLIBC_2.17' can not be used when making a shared
> object; recompile with -fPIC
> >> /usr/bin/ld: /usr/local/lib/libflext-pd_s.
> a(libflext_pd_s_la-flxlet.o)(.text+0x344): unresolvable
> R_AARCH64_ADR_PREL_PG_HI21 relocation against symbol `__stack_chk_guard@
> @GLIBC_2.17'
> >> /usr/bin/ld: final link failed: Bad value
> >> collect2: error: ld returned 1 exit status
> >>
> >>
> >> I also tried to compile inserting the flag -fno-stack-protector as
> indicated for a related case
> >> on this link http://stackoverflow.com/questions/15787684/lfs-glibc-
> compilation-ld-error
> >> but I got the same result.
> >>
> >> Any ideas? My version of g++ is 5.4.0.
> >>
> >> I was also wondering whether the flags -ffast-math and -O3 are
> appropriate for armv8-64 platforms.
> >>
> >>
> >>
> >> Best
> >>
> >> Luca
> >>
> >>
> >>
> >>
> >> ______________________________________________
> >>
> >> Luca Turchet, Ph.D.
> >> Postdoctoral Research Fellow
> >>
> >> Department of Architecture, Design & Media Technology
> >> Aalborg University Copenhagen
> >> A. C. Meyers Vænge 15
> >> DK-2450 Copenhagen SV
> >>
> >> E-mail: tur at create.aau.dk
> >> Project Website: www.ahws-project.net
> >> Personal Website: www.lucaturchet.it
> >> _______________________________________________
> >> http://grrrr.org/ext/flext
> >>
> >> flext mailing list
> >> flext at grrrr.org
> >> http://grrrr.org/cgi-bin/mailman/listinfo/flext
>

-- 
Thomas Grill
http://grrrr.org
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