[Bug target/123076] New: [15/16 Regression] [m68k] CPython interpreter locks up when built with GCC 15 with -O2

[glaubitz at physik dot fu-berlin.de via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123076

            Bug ID: 123076
           Summary: [15/16 Regression] [m68k] CPython interpreter locks up
                    when built with GCC 15 with -O2
           Product: gcc
           Version: 15.2.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: glaubitz at physik dot fu-berlin.de
                CC: schwab at gcc dot gnu.org, sjames at gcc dot gnu.org
  Target Milestone: ---
            Target: m68k-*-*

Trying to build CPython (Python 3.13 or 3.14) on m68k GCC 15 with -O2 causes
the interpreter to lock up during build:

PYTHONPATH=/<<PKGBUILDDIR>>/debian/tmp/usr/lib/python3.14  \
        ./python -E -Wi
/<<PKGBUILDDIR>>/debian/tmp/usr/lib/python3.14/compileall.py \
        -o 0 -o 1 -o 2 -j0 -d /usr/lib/python3.14 -f \
        -x 'bad_coding|badsyntax|site-packages' \
        /<<PKGBUILDDIR>>/debian/tmp/usr/lib/python3.14
Listing '/<<PKGBUILDDIR>>/debian/tmp/usr/lib/python3.14'...
Listing '/<<PKGBUILDDIR>>/debian/tmp/usr/lib/python3.14/__phello__'...
E: Build killed with signal TERM after 600 minutes of inactivity

Building or with GCC 14 with -O1 works fine. I have not tracked down yet which
of the -O2 optimization flags causes the lock-ups.

Full build log in:
https://buildd.debian.org/status/fetch.php?pkg=python3.14&arch=m68k&ver=3.14.0-5&stamp=1764697002&raw=0