Source: unicon-imc2
Version: 3.0.4-14+b1
Severity: important
User: bal...@balintreczey.hu
Usertags: pie-bindnow-20160906
Justification: makes zhcon FTBFS with extra hardening
Affects: zhcon

Dear Maintainers,

During a rebuild of all packages in sid, zhcon
failed to build on amd64 with patched GCC and dpkg. The root
cause seems to be that libimmclient.a is shipped as a non-PIC library.

The rebuild tested if packages are ready for a transition
enabling PIE and bindnow for amd64 (and selected architectures).

For more information about the changes to sid's dpkg and GCC please
visit:
 https://wiki.debian.org/Hardening/PIEByDefaultTransition

Relevant part of zhcon's build log:
...
g++  -g -O2 -fdebug-prefix-map=/<<PKGBUILDDIR>>=.
-fstack-protector-strong -Wformat -Werror=format-security
-funsigned-char -O2 -DNDEBUG -Wall  -Wl,-z,relro -Wl,-z,now -o zhcon
basefont.o big52gbdecoder.o big5decoder.o configfile.o console.o
gb2big5decoder.o gbdecoder.o gbkdecoder.o graphdev.o hzdecoder.o
jisdecoder.o kscdecoder.o main.o window.o winime.o zhcon.o
overspotclient.o nativeinputserver.o inputclient.o inputmanager.o
inputserver.o candilist.o uniconinputserver.o nativebarclient.o mouse.o
encfilter.o iconv_string.o cmdline.o display/libdisplay.a -lgpm
-L/usr/lib/unicon -limm_server -limmclient -lpth -ldl -lcurses -lutil
/usr/bin/ld:
/usr/lib/gcc/x86_64-linux-gnu/6/../../../../lib/libimmclient.a(TLC_LibImmClient.o):
relocation R_X86_64_PC32 against symbol `TCP_Connect' can not be used
when making a shared object; recompile with -fPIC
/usr/bin/ld: final link failed: Bad value
...

The full build log is available from:
 
https://people.debian.org/~rbalint/build-logs/pie-bindnow-20160906/zhcon_0.2.6-11_amd64.build.gz

Thanks,
Balint

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