Trying to build for PPC64LE, test compilation is failing

Log and Config: https://travis-ci.com/github/ezeeyahoo/jemalloc/jobs/371836005

Build language: generic

Build dist: precise

Build id: 179638632

Job id: 371836005

Runtime kernel version: 5.4.28

travis-build version: 1a7f9ec9

Build image provisioning date and time

Mon May 25 07:49:00 UTC 2020

Operating System Details

Distributor ID:	Ubuntu

Description:	Ubuntu 20.04 LTS

Release:	20.04

Codename:	focal

$ export CC=gcc-8
$ export CXX=g++-8
$ export COMPILER_FLAGS=""
$ export CONFIGURE_FLAGS=""
$ export EXTRA_CFLAGS="-Werror -Wno-array-bounds"
$ autoconf
$ scripts/gen_travis.py > travis_script && diff .travis.yml travis_script
$ ./configure ${COMPILER_FLAGS:+       CC="$CC $COMPILER_FLAGS"       CXX="$CXX $COMPILER_FLAGS" }       $CONFIGURE_FLAGS
$ make -j3
$ make -j3 tests

In file included from test/include/test/jemalloc_test.h:128,
                 from test/unit/flat_bitmap.c:1:
test/unit/flat_bitmap.c: In function 'expect_iter_results_at.constprop':
test/include/test/test.h:6:5: error: 'simple_iter_len' may be used uninitialized in this function [-Werror=maybe-uninitialized]
  if (!(a_ cmp b_)) {      \
     ^
test/unit/flat_bitmap.c:465:9: note: 'simple_iter_len' was declared here
  size_t simple_iter_len;

Start with test/unit/flat_bitmap.c around the expect_iter_results_at function and the simple_iter_len declaration at line 465; review the assertion macro in test/include/test/test.h. Run make -j3 tests with the reported PPC64LE compiler flags and confirm that the test suite compiles without the maybe-uninitialized error.