What did you do?

Built and run Pillow master (290cd17) on Gentoo/HPPA (big endian!) and ran the test suite:

What actually happened?

Tests/test_file_gif.py::TestFileGif::test_extents FAILED
Tests/test_file_ico.py::TestFileIco::test_unexpected_size FAILED
Tests/test_file_jpeg.py::TestFileJpeg::test_photoshop FAILED
Tests/test_file_libtiff.py::TestFileLibTiff::test_16bit_RGB_tiff FAILED
Tests/test_file_libtiff.py::TestFileLibTiff::test_old_style_jpeg FAILED
Tests/test_file_libtiff.py::TestFileLibTiff::test_strip_cmyk_16l_jpeg FAILED
Tests/test_file_libtiff.py::TestFileLibTiff::test_strip_ycbcr_jpeg_1x1_sampling FAILED
Tests/test_file_libtiff.py::TestFileLibTiff::test_strip_ycbcr_jpeg_2x2_sampling FAILED
Tests/test_file_libtiff.py::TestFileLibTiff::test_tiled_ycbcr_jpeg_1x1_sampling FAILED
Tests/test_file_libtiff.py::TestFileLibTiff::test_tiled_ycbcr_jpeg_2x2_sampling FAILED
Tests/test_file_png.py::TestFilePng::test_sanity FAILED
Tests/test_image_getextrema.py::TestImageGetExtrema::test_extrema FAILED
Tests/test_image_getextrema.py::TestImageGetExtrema::test_true_16 FAILED
Tests/test_imagedraw.py::TestImageDraw::test_arc_width_pieslice_large FAILED
Tests/test_imagedraw.py::TestImageDraw::test_ellipse_width_large FAILED
Tests/test_imagedraw.py::TestImageDraw::test_rectangle_I16 FAILED

Not all of those are regressions, here is the fail list for 6.0.0:

Tests/test_file_libtiff.py::TestFileLibTiff::test_old_style_jpeg FAILED
Tests/test_file_libtiff.py::TestFileLibTiff::test_strip_ycbcr_jpeg_1x1_sampling FAILED
Tests/test_file_libtiff.py::TestFileLibTiff::test_strip_ycbcr_jpeg_2x2_sampling FAILED
Tests/test_file_libtiff.py::TestFileLibTiff::test_tiled_ycbcr_jpeg_1x1_sampling FAILED
Tests/test_file_libtiff.py::TestFileLibTiff::test_tiled_ycbcr_jpeg_2x2_sampling FAILED
Tests/test_file_png.py::TestFilePng::test_sanity FAILED
Tests/test_image_getextrema.py::TestImageGetExtrema::test_extrema FAILED
Tests/test_image_getextrema.py::TestImageGetExtrema::test_true_16 FAILED

What are your OS, Python and Pillow versions?

• OS: Gentoo HPPA
• Python: 2.7.15
• Pillow: current master

pillow-6.1.0.log