Stephen J. Turnbull added the comment:
I did "emerge =dev-lang/python-2.7.5-r1" *twice* with the environment
configuration described in msg196520, then *once* with it disabled because one
of the cases you described was when you tried to revert to a non-debug Python.
(Besides, I am willing to risk your crash while I'm watching for it, but not a
time bomb that will go off when I'm on deadline :-). All builds succeeded and
all passed the test suite. Here's how the debug build describes itself:
== CPython 2.7.5 (default, Sep 1 2013, 00:59:02) [GCC 4.6.4]
== Linux-3.9.0-x86_64-Dual_Core_AMD_Opteron-tm-_Processor_265-with-gentoo-2.2
little-endian
The test suite ran uneventfully (with a few DeprecationWarnings) except for
this:
6 skips unexpected on linux2:
test_bsddb test_bsddb3 test_tcl test_tk test_ttk_guionly
test_ttk_textonly
but I suppose that is expected on Gentoo. If any of those modules (bsddb, tcl,
tk) are built into your Python, a problem in one of those might be the culprit.
Oh, damn. I just reread the whole thread. For some reason I thought you were
using gcc 4.6.4, but now I see you report 4.7.3. OK build with 4.7.3 and your
flags (also restore the --with-pydebug config):
# export CFLAGS=" -ggdb -pipe -msse -msse2 -msse3 -mssse3 -msse4.1 -msse4.2
-msse4 -mavx -maes -mpclmul -mpopcnt"
# export CXXFLAGS="${CFLAGS}"
# export CC=gcc-4.7.3
and we crash (from make output) immediately after linking ./python:
x86_64-pc-linux-gnu-ranlib libpython2.7.a
gcc-4.7.3 -pthread -Wl,--hash-style=gnu -Wl,-O1 -Wl,--as-needed -L. -Xlinker
-export-dynamic -o python \
Modules/python.o \
-L. -lpython2.7 -lpthread -ldl -lutil -lm
LD_LIBRARY_PATH=/var/tmp/portage/dev-lang/python-2.7.5-r1/work/x86_64-pc-linux-gnu:
./python -E -S -m sysconfig --generate-posix-vars
make: *** [pybuilddir.txt] Illegal instruction
However, I'm pretty sure this is due to my hardware not liking your -m flags,
not the crash you reported. I'll try backing those flags out, but if anybody
has a suggestion for the most aggressive set similar to yours, I'd appreciate
it.
But first this process is going to go sleep(25200).
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<http://bugs.python.org/issue18843>
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