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

Fri Aug 12 22:48:12 UTC 2016

Hi Thomas,
I managed to compile the external leveraging your suggestion of using build.sh to build flext

Thanks a lot

Best wishes

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<mailto:tur at create.aau.dk>
Project Website: www.ahws-project.net<http://www.ahws-project.net>
Personal Website: www.lucaturchet.it<http://www.lucaturchet.it>
________________________________
From: grrrr.org at gmail.com [grrrr.org at gmail.com] on behalf of Thomas Grill [gr at grrrr.org]
Sent: Friday, August 12, 2016 11:23 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,
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<mailto: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<mailto:tur at create.aau.dk>
Project Website: www.ahws-project.net<http://www.ahws-project.net>
Personal Website: www.lucaturchet.it<http://www.lucaturchet.it>

________________________________________
From: Thomas Grill [grrrr.org at gmail.com<mailto:grrrr.org at gmail.com>] on behalf of Thomas Grill [gr at grrrr.org<mailto:gr at grrrr.org>]
Sent: Friday, August 12, 2016 10:17 PM
To: Luca Turchet
Cc: flext at grrrr.org<mailto: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<mailto: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<mailto:tur at create.aau.dk>
> Project Website: www.ahws-project.net<http://www.ahws-project.net>
> Personal Website: www.lucaturchet.it<http://www.lucaturchet.it>
>
> ________________________________________
> From: Thomas Grill [grrrr.org at gmail.com<mailto:grrrr.org at gmail.com>] on behalf of Thomas Grill [gr at grrrr.org<mailto:gr at grrrr.org>]
> Sent: Friday, August 12, 2016 10:00 PM
> To: Luca Turchet
> Cc: flext at grrrr.org<mailto: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<mailto: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<mailto:tur at create.aau.dk>
>> Project Website: www.ahws-project.net<http://www.ahws-project.net>
>> Personal Website: www.lucaturchet.it<http://www.lucaturchet.it>
>> From: flext [flext-bounces at grrrr.org<mailto:flext-bounces at grrrr.org>] on behalf of Luca Turchet [tur at create.aau.dk<mailto:tur at create.aau.dk>]
>> Sent: Friday, August 12, 2016 7:00 PM
>> To: flext at grrrr.org<mailto: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<mailto:tur at create.aau.dk>
>> Project Website: www.ahws-project.net<http://www.ahws-project.net>
>> Personal Website: www.lucaturchet.it<http://www.lucaturchet.it>
>> _______________________________________________
>> http://grrrr.org/ext/flext
>>
>> flext mailing list
>> flext at grrrr.org<mailto:flext at grrrr.org>
>> http://grrrr.org/cgi-bin/mailman/listinfo/flext

--
Thomas Grill
http://grrrr.org
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