Bug#837453: flint: FTBFS with bindnow and PIE enabled

[Balint Reczey]

Source: flint
Version: 2.5.2-8
Severity: important
User: balint at balintreczey.hu
Usertags: pie-bindnow-20160906
Justification: FTBFS on amd64 with extra hardening
Tags: patch

Hi,

During a rebuild of all packages in sid, your package failed to build on
amd64 with patched GCC and dpkg.

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

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

Relevant part (hopefully):
...
gcc -fPIC -Wdate-time -D_FORTIFY_SOURCE=2 -g -O2
-fdebug-prefix-map=/<<PKGBUILDDIR>>=. -fstack-protect
or-strong -Wformat -Werror=format-security -I/<<PKGBUILDDIR>> -c
factor_trial_partial.c -o ../build/ul
ong_extras/factor_trial_partial.lo -MMD -MP -MF
"../build/ulong_extras/factor_trial_partial.d" -MT "..
/build/ulong_extras/factor_trial_partial.d" -MT
"../build/ulong_extras/factor_trial_partial.lo"
gcc -Wl,-z,relro -Wl,-z,now -Wl,-r ../build/ulong_extras/sizeinbase.lo
../build/ulong_extras/mulmod_pr
ecomp.lo ../build/ulong_extras/is_square.lo
../build/ulong_extras/euler_phi.lo ../build/ulong_extras/d
ivrem2_precomp.lo ../build/ulong_extras/mulmod2_preinv.lo
../build/ulong_extras/factor_SQUFOF.lo ../bu
ild/ulong_extras/powmod2_preinv.lo
../build/ulong_extras/primitive_root_prime.lo ../build/ulong_extras
/randlimb.lo ../build/ulong_extras/discrete_log_bsgs.lo
../build/ulong_extras/lll_mod_preinv.lo ../bui
ld/ulong_extras/factor_partial.lo ../build/ulong_extras/mod2_precomp.lo
../build/ulong_extras/flog.lo
../build/ulong_extras/factor_pp1.lo
../build/ulong_extras/factorial_mod2_preinv.lo ../build/ulong_extr
as/root.lo ../build/ulong_extras/mulmod_preinv.lo
../build/ulong_extras/gcdinv.lo ../build/ulong_extra
s/prime_inverses_arr_readonly.lo
../build/ulong_extras/is_probabprime_BPSW.lo ../build/ulong_extras/po
wmod_preinv.lo ../build/ulong_extras/inlines.lo
../build/ulong_extras/cleanup_primes.lo ../build/ulong
_extras/jacobi.lo ../build/ulong_extras/powmod_precomp.lo
../build/ulong_extras/is_prime_pseudosquare.
lo ../build/ulong_extras/primes_extend_small.lo
../build/ulong_extras/primes_sieve_range.lo ../build/u
long_extras/mod2_preinv.lo ../build/ulong_extras/is_perfect_power235.lo
../build/ulong_extras/moebius_
mu.lo ../build/ulong_extras/sqrtrem.lo ../build/ulong_extras/revbin.lo
../build/ulong_extras/mod_preco
mp.lo ../build/ulong_extras/cbrt_estimate.lo
../build/ulong_extras/gcd.lo ../build/ulong_extras/factor
.lo ../build/ulong_extras/factor_trial.lo
../build/ulong_extras/is_strong_probabprime2_preinv.lo ../bu
ild/ulong_extras/ll_mod_preinv.lo ../build/ulong_extras/primes_clear.lo
../build/ulong_extras/rootrem.
lo ../build/ulong_extras/factor_power235.lo
../build/ulong_extras/sqrt.lo ../build/ulong_extras/remove
2_precomp.lo ../build/ulong_extras/sqrtmodn.lo
../build/ulong_extras/cbrt_binary_search.lo ../build/ul
ong_extras/is_prime.lo ../build/ulong_extras/factor_insert.lo
../build/ulong_extras/clog.lo ../build/u
long_extras/nth_prime_bounds.lo ../build/ulong_extras/factor_one_line.lo
../build/ulong_extras/prime_p
i.lo ../build/ulong_extras/sqrtmod_primepow.lo
../build/ulong_extras/cbrtrem.lo ../build/ulong_extras/
sqrtmod.lo ../build/ulong_extras/factorial_fast_mod2_preinv.lo
../build/ulong_extras/cbrt.lo ../build/
ulong_extras/invmod.lo ../build/ulong_extras/cbrt_newton_iteration.lo
../build/ulong_extras/is_oddprim
e_binary.lo ../build/ulong_extras/is_probabprime.lo
../build/ulong_extras/is_squarefree.lo ../build/ul
ong_extras/is_probabprime_fermat.lo ../build/ulong_extras/randtest.lo
../build/ulong_extras/primes_arr
_readonly.lo ../build/ulong_extras/primes_jump_after.lo
../build/ulong_extras/pow.lo ../build/ulong_ex
tras/randint.lo ../build/ulong_extras/is_probabprime_lucas.lo
../build/ulong_extras/root_estimate.lo .
./build/ulong_extras/nth_prime.lo
../build/ulong_extras/prime_pi_bounds.lo ../build/ulong_extras/facto
r_lehman.lo ../build/ulong_extras/is_strong_probabprime_precomp.lo
../build/ulong_extras/primes_init.l
o ../build/ulong_extras/cbrt_chebyshev_approximation.lo
../build/ulong_extras/nextprime.lo ../build/ul
ong_extras/is_prime_pocklington.lo
../build/ulong_extras/factor_trial_range.lo
../build/ulong_extras/compute_primes.lo ../build/ulong_extras/xgcd.lo
../build/ulong_extras/is_oddprime_small.lo
../build/ulong_extras/is_probabprime_fibonacci.lo
../build/ulong_extras/remove.lo ../build/ulong_extras/randbits.lo
../build/ulong_extras/randprime.lo
../build/ulong_extras/factor_trial_partial.lo -o
../build/ulong_extras/../ulong_extras.lo -nostdlib
/usr/bin/ld: -r and -pie may not be used together
collect2: error: ld returned 1 exit status

...

The full build log is available from:
 https://people.debian.org/~rbalint/build-logs/pie-bindnow-20160906/flint_2.5.2-8_amd64.build.gz

The patch used in Ubuntu fixes the issue:
https://patches.ubuntu.com/f/flint/flint_2.5.2-9ubuntu1.patch

Thanks,
Balint