If it helps, it seems it is using the following CFLAGS: -std=gnu99 -m64 -fomit-frame-pointer -O2 -march=corei7-avx -mtune=corei7-avx
PASS: t-root
/bin/sh: line 1: 27163 Segmentation fault (core dumped) "$tst" > t-scan.log-t 2>&1
FAIL: t-scan
PASS: t-set_d
PASS: t-set_f
PASS: t-set_si
PASS: t-set_str
PASS: t-set_sx
PASS: t-set_ux
PASS: t-sizeinbase
PASS: t-sqrtrem
PASS: t-tdiv
PASS: t-tdiv_ui
PASS: t-trial_division
PASS: st_hamdist
PASS: st_popcount
=============================================================
1 of 66 tests failed
See tests/mpz/test-suite.log
=============================================================
make[5]: *** [test-suite.log] Error 1
make[5]: Leaving directory `/home/ra101324/workspace/mpir/tests/mpz'
make[4]: *** [check-TESTS] Error 2
make[4]: Leaving directory `/home/ra101324/workspace/mpir/tests/mpz'
make[3]: *** [check-am] Error 2
make[3]: Leaving directory `/home/ra101324/workspace/mpir/tests/mpz'
make[2]: *** [check-recursive] Error 1
make[2]: Leaving directory `/home/ra101324/workspace/mpir/tests'
make[1]: *** [check-recursive] Error 1
make[1]: Leaving directory `/home/ra101324/workspace/mpir'
make: *** [check] Error 2
ra101324 at conway in ~/workspace/mpir (master●●)
$ cat tests/mpz/test-suite.log
==========================================
MPIR 2.6.0: tests/mpz/test-suite.log
==========================================
1 of 66 tests failed.
.. contents:: :depth: 2
FAIL: t-scan (exit: 139)
========================