I've now run the full set of tests on three different builds of
10.1-rc1, and I'm almost in agreement about the expected results.

Two builds were on ryzen.  Those used -O3 throughout, even in gcc
where I had stopped doing that because of failures I described as in
the torture tests.  Reinstated because on a semi-decent development
machine I want to build more quickly.  The other build was one my i3
skylake using -O2 - it's not a main development machine.

The following packages still cause me to query what the book says:

tcl: I still think that the line
 Files with failing tests: http.test httpold.test
should be mentioned in addition to the clock test (which exits with
errors).

gcc: I get two additional failures in libstdc++ on all three
machines,

FAIL: 20_util/unsynchronized_pool_resource/allocate.cc execution test
FAIL: 22_locale/numpunct/members/char/3.cc execution test

Totals for unexpected failures in my builds:
         -O2   -O3
 g++      17    17 and 18
 gcc       7    21
 libstdc++ 8     8

So, using -O3 still breaks some more gcc torture tests (but the
build seems to work well).  But I think those two extra libstdc++
failures ought to be mentoned.

Python: for me, test_normalization passed on each build.  Not sure
if it still fails for you guys ?

coreutils: We say test-getlogin is known to fail, but in each of my
builds I have:
SKIP: test-getlogin

util-linux: we pass -k to make check without specifying any details.
For me, column/invalid multibyte failed on each of my builds.

Apart from these minor details of what to expect, this is now all
looking really good.  I'll also mention that for inetutils, where
libls _may_ fail, it failed on the O2 build and one of the O3
builds, but not on the other O3 build.

ĸen
-- 
Juliet's version of cleanliness was next to godliness, which was to
say it was erratic, past all understanding and was seldom seen.
                          -- Unseen Academicals
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