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

Fri Aug 12 20:17:30 UTC 2016

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

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