`test_struct` fails for python 3.14.2 built with gcc/clang

[ppigazzini]

Bug report

Bug description:

I routinely use on my Ubuntu machines pyenv and a script to install python versions:

Click to view

 python_ver=3.14.2

# setup pyenv and install latest python
# https://github.com/pyenv/pyenv
# https://github.com/python/pyperformance

if ! command -v pyenv &>/dev/null; then
  # dependencies according to pyenv
  #sudo apt update; sudo apt install -y build-essential libssl-dev zlib1g-dev libbz2-dev libreadline-dev libsqlite3-dev libncursesw5-dev xz-utils tk-dev libxml2-dev libxmlsec1-dev libffi-dev liblzma-dev

  # Workaround missing libmpdec-dev on ubuntu 24.04 (it should be re introduced in ubuntu 26.04):
  # https://launchpad.net/~ondrej/+archive/ubuntu/php
  # https://deb.sury.org/
  sudo add-apt-repository -y ppa:ondrej/php

  # dependencies according to python build doc dropping packages used in CI (ccache, cmake, gdb, inetutils-inetd, lcov, lzma, strace, xvfb)
  # https://devguide.python.org/getting-started/setup-building/index.html#build-dependencies
  # https://github.com/python/cpython/blob/main/.github/workflows/posix-deps-apt.sh
  sudo apt update; sudo apt install -y build-essential pkg-config libb2-dev libbz2-dev libffi-dev libgdbm-dev libgdbm-compat-dev liblzma-dev libncurses5-dev libreadline6-dev libsqlite3-dev libssl-dev lzma-dev tk-dev uuid-dev zlib1g-dev libzstd-dev libmpdec-dev

  pyenv_dir="$HOME/.pyenv"
  git clone https://github.com/pyenv/pyenv.git "$pyenv_dir"

  cat << 'EOF' >> "$HOME/.profile"

# pyenv: keep at the end of the file
export PYENV_ROOT="$HOME/.pyenv"
command -v pyenv >/dev/null || export PATH="$PYENV_ROOT/bin:$PATH"
eval "$(pyenv init -)"
EOF

  cat << 'EOF' >> "$HOME/.bashrc"

# pyenv: keep at the end of the file
export PYENV_ROOT="$HOME/.pyenv"
command -v pyenv >/dev/null || export PATH="$PYENV_ROOT/bin:$PATH"
eval "$(pyenv init -)"
EOF

  . "$HOME/.profile"
  pushd "$pyenv_dir" && src/configure && make -C src && popd
  #CC="clang" CXX="clang++" LDFLAGS="${LDFLAGS:+$LDFLAGS }-fuse-ld=lld" PYTHON_CONFIGURE_OPTS="--enable-optimizations --with-lto --with-tail-call-interp --enable-bolt" PYTHON_CFLAGS="-march=native -mtune=native" pyenv install "$python_ver"
  CC="clang" CXX="clang++" LDFLAGS="${LDFLAGS:+$LDFLAGS }-fuse-ld=lld" PYTHON_CONFIGURE_OPTS="--enable-optimizations --with-lto" PYTHON_CFLAGS="-march=native -mtune=native" pyenv install "$python_ver"
  #PYTHON_CONFIGURE_OPTS="--enable-optimizations --with-lto" PYTHON_CFLAGS="-march=native -mtune=native" pyenv install "$python_ver"
  pyenv global "$python_ver"
fi

test_struct fails in python3 -m test with python 3.14.2 (and 3.14.1) with this traceback:

Click to view

0:18:03 load avg: 0.84 [387/491] test_struct
Exception in initializer:
Traceback (most recent call last):
  File "/home/usr00/.pyenv/versions/3.14.2/lib/python3.14/concurrent/interpreters/_crossinterp.py", line 88, in serialize_unbound
    flag = _UNBOUND_CONSTANT_TO_FLAG[op]
           ~~~~~~~~~~~~~~~~~~~~~~~~~^^^^
KeyError: concurrent.interpreters._queues.UNBOUND

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/usr00/.pyenv/versions/3.14.2/lib/python3.14/concurrent/futures/thread.py", line 99, in _worker
    ctx.initialize()
    ~~~~~~~~~~~~~~^^
  File "/home/usr00/.pyenv/versions/3.14.2/lib/python3.14/concurrent/futures/interpreter.py", line 64, in initialize
    self.results = interpreters.create_queue(maxsize)
                   ~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^
  File "/home/usr00/.pyenv/versions/3.14.2/lib/python3.14/concurrent/interpreters/_queues.py", line 75, in create
    unbound = _serialize_unbound(unbounditems)
  File "/home/usr00/.pyenv/versions/3.14.2/lib/python3.14/concurrent/interpreters/_queues.py", line 56, in _serialize_unbound
    return _crossinterp.serialize_unbound(unbound)
           ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^
  File "/home/usr00/.pyenv/versions/3.14.2/lib/python3.14/concurrent/interpreters/_crossinterp.py", line 90, in serialize_unbound
    raise NotImplementedError(f'unsupported unbound replacement op {op!r}')
NotImplementedError: unsupported unbound replacement op concurrent.interpreters._queues.UNBOUND
Exception in initializer:
Traceback (most recent call last):
  File "/home/usr00/.pyenv/versions/3.14.2/lib/python3.14/concurrent/interpreters/_crossinterp.py", line 88, in serialize_unbound
    flag = _UNBOUND_CONSTANT_TO_FLAG[op]
           ~~~~~~~~~~~~~~~~~~~~~~~~~^^^^
KeyError: concurrent.interpreters._queues.UNBOUND

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/usr00/.pyenv/versions/3.14.2/lib/python3.14/concurrent/futures/thread.py", line 99, in _worker
    ctx.initialize()
    ~~~~~~~~~~~~~~^^
  File "/home/usr00/.pyenv/versions/3.14.2/lib/python3.14/concurrent/futures/interpreter.py", line 64, in initialize
    self.results = interpreters.create_queue(maxsize)
                   ~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^
  File "/home/usr00/.pyenv/versions/3.14.2/lib/python3.14/concurrent/interpreters/_queues.py", line 75, in create
    unbound = _serialize_unbound(unbounditems)
  File "/home/usr00/.pyenv/versions/3.14.2/lib/python3.14/concurrent/interpreters/_queues.py", line 56, in _serialize_unbound
    return _crossinterp.serialize_unbound(unbound)
           ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^
  File "/home/usr00/.pyenv/versions/3.14.2/lib/python3.14/concurrent/interpreters/_crossinterp.py", line 90, in serialize_unbound
    raise NotImplementedError(f'unsupported unbound replacement op {op!r}')
NotImplementedError: unsupported unbound replacement op concurrent.interpreters._queues.UNBOUND
Exception in initializer:
Traceback (most recent call last):
  File "/home/usr00/.pyenv/versions/3.14.2/lib/python3.14/concurrent/interpreters/_crossinterp.py", line 88, in serialize_unbound
    flag = _UNBOUND_CONSTANT_TO_FLAG[op]
           ~~~~~~~~~~~~~~~~~~~~~~~~~^^^^
KeyError: concurrent.interpreters._queues.UNBOUND

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/usr00/.pyenv/versions/3.14.2/lib/python3.14/concurrent/futures/thread.py", line 99, in _worker
    ctx.initialize()
    ~~~~~~~~~~~~~~^^
  File "/home/usr00/.pyenv/versions/3.14.2/lib/python3.14/concurrent/futures/interpreter.py", line 64, in initialize
    self.results = interpreters.create_queue(maxsize)
                   ~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^
  File "/home/usr00/.pyenv/versions/3.14.2/lib/python3.14/concurrent/interpreters/_queues.py", line 75, in create
    unbound = _serialize_unbound(unbounditems)
  File "/home/usr00/.pyenv/versions/3.14.2/lib/python3.14/concurrent/interpreters/_queues.py", line 56, in _serialize_unbound
    return _crossinterp.serialize_unbound(unbound)
           ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^
  File "/home/usr00/.pyenv/versions/3.14.2/lib/python3.14/concurrent/interpreters/_crossinterp.py", line 90, in serialize_unbound
    raise NotImplementedError(f'unsupported unbound replacement op {op!r}')
NotImplementedError: unsupported unbound replacement op concurrent.interpreters._queues.UNBOUND
Exception in initializer:
Traceback (most recent call last):
  File "/home/usr00/.pyenv/versions/3.14.2/lib/python3.14/concurrent/interpreters/_crossinterp.py", line 88, in serialize_unbound
    flag = _UNBOUND_CONSTANT_TO_FLAG[op]
           ~~~~~~~~~~~~~~~~~~~~~~~~~^^^^
KeyError: concurrent.interpreters._queues.UNBOUND

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/usr00/.pyenv/versions/3.14.2/lib/python3.14/concurrent/futures/thread.py", line 99, in _worker
    ctx.initialize()
    ~~~~~~~~~~~~~~^^
  File "/home/usr00/.pyenv/versions/3.14.2/lib/python3.14/concurrent/futures/interpreter.py", line 64, in initialize
    self.results = interpreters.create_queue(maxsize)
                   ~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^
  File "/home/usr00/.pyenv/versions/3.14.2/lib/python3.14/concurrent/interpreters/_queues.py", line 75, in create
    unbound = _serialize_unbound(unbounditems)
  File "/home/usr00/.pyenv/versions/3.14.2/lib/python3.14/concurrent/interpreters/_queues.py", line 56, in _serialize_unbound
    return _crossinterp.serialize_unbound(unbound)
           ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^
  File "/home/usr00/.pyenv/versions/3.14.2/lib/python3.14/concurrent/interpreters/_crossinterp.py", line 90, in serialize_unbound
    raise NotImplementedError(f'unsupported unbound replacement op {op!r}')
NotImplementedError: unsupported unbound replacement op concurrent.interpreters._queues.UNBOUND
Exception in initializer:
Traceback (most recent call last):
  File "/home/usr00/.pyenv/versions/3.14.2/lib/python3.14/concurrent/interpreters/_crossinterp.py", line 88, in serialize_unbound
    flag = _UNBOUND_CONSTANT_TO_FLAG[op]
           ~~~~~~~~~~~~~~~~~~~~~~~~~^^^^
KeyError: concurrent.interpreters._queues.UNBOUND

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/usr00/.pyenv/versions/3.14.2/lib/python3.14/concurrent/futures/thread.py", line 99, in _worker
    ctx.initialize()
    ~~~~~~~~~~~~~~^^
  File "/home/usr00/.pyenv/versions/3.14.2/lib/python3.14/concurrent/futures/interpreter.py", line 64, in initialize
    self.results = interpreters.create_queue(maxsize)
                   ~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^
  File "/home/usr00/.pyenv/versions/3.14.2/lib/python3.14/concurrent/interpreters/_queues.py", line 75, in create
    unbound = _serialize_unbound(unbounditems)
  File "/home/usr00/.pyenv/versions/3.14.2/lib/python3.14/concurrent/interpreters/_queues.py", line 56, in _serialize_unbound
    return _crossinterp.serialize_unbound(unbound)
           ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^
  File "/home/usr00/.pyenv/versions/3.14.2/lib/python3.14/concurrent/interpreters/_crossinterp.py", line 90, in serialize_unbound
    raise NotImplementedError(f'unsupported unbound replacement op {op!r}')
NotImplementedError: unsupported unbound replacement op concurrent.interpreters._queues.UNBOUND
test test_struct failed -- Traceback (most recent call last):
  File "/home/usr00/.pyenv/versions/3.14.2/lib/python3.14/test/test_struct.py", line 818, in test_endian_table_init_subinterpreters
    self.assertListEqual(list(results), [None] * 5)
                         ~~~~^^^^^^^^^
  File "/home/usr00/.pyenv/versions/3.14.2/lib/python3.14/concurrent/futures/_base.py", line 639, in result_iterator
    yield _result_or_cancel(fs.pop())
          ~~~~~~~~~~~~~~~~~^^^^^^^^^^
  File "/home/usr00/.pyenv/versions/3.14.2/lib/python3.14/concurrent/futures/_base.py", line 311, in _result_or_cancel
    return fut.result(timeout)
           ~~~~~~~~~~^^^^^^^^^
  File "/home/usr00/.pyenv/versions/3.14.2/lib/python3.14/concurrent/futures/_base.py", line 450, in result
    return self.__get_result()
           ~~~~~~~~~~~~~~~~~^^
  File "/home/usr00/.pyenv/versions/3.14.2/lib/python3.14/concurrent/futures/_base.py", line 395, in __get_result
    raise self._exception
concurrent.futures.interpreter.BrokenInterpreterPool: A thread initializer failed, the thread pool is not usable anymore

0:18:04 load avg: 0.84 [387/491/1] test_struct failed (1 error)

Tested on Ubuntu 24.04 (gcc 14.2.0 - clang 21.1.8) and Ubuntu 20.04 (gcc 11.4.0), several CPUs.

python 3.14.0 and 3.13.x, bult in the same way, pass smoothly python3 -m test

CPython versions tested on:

3.14

Operating systems tested on:

Linux

[thesamesam]

Given your use of -march=native, I think you need to share what it resolves to.

[ppigazzini]

All these 5 machines have python 3.14.0, at least one version of python 3.13.7 - 3.13.9 - 3.13.11, one machine has 3.6.15 as well. python3 -m test had problems with 3.14.1 (even segmentation fault with clang on 2 machines) and with 3.14.2 test_struct fails for any compiler/CPU.

Intel(R) Xeon(R) CPU E5-2680 v3 @ 2.50GHz - Ubuntu 24.04

clang -E - -march=native -###

Ubuntu clang version 21.1.8 (++20251202083326+f68f64eb8130-1~exp1~20251202083450.66)
Target: x86_64-pc-linux-gnu
Thread model: posix
InstalledDir: /usr/lib/llvm-21/bin
 (in-process)
 "/usr/lib/llvm-21/bin/clang" "-cc1" "-triple" "x86_64-pc-linux-gnu" "-E" "-disable-free" "-clear-ast-before-backend" "-disable-llvm-verifier" "-discard-value-names" "-main-file-name" "-" "-mrelocation-model" "pic" "-pic-level" "2" "-pic-is-pie" "-mframe-pointer=all" "-fmath-errno" "-ffp-contract=on" "-fno-rounding-math" "-mconstructor-aliases" "-funwind-tables=2" "-target-cpu" "haswell" "-target-feature" "-prfchw" "-target-feature" "-cldemote" "-target-feature" "+avx" "-target-feature" "+aes" "-target-feature" "+sahf" "-target-feature" "+pclmul" "-target-feature" "-xop" "-target-feature" "+crc32" "-target-feature" "-amx-fp8" "-target-feature" "-xsaves" "-target-feature" "-avx512fp16" "-target-feature" "-usermsr" "-target-feature" "-sm4" "-target-feature" "-egpr" "-target-feature" "+sse4.1" "-target-feature" "-avx512ifma" "-target-feature" "+xsave" "-target-feature" "+sse4.2" "-target-feature" "-tsxldtrk" "-target-feature" "-sm3" "-target-feature" "-ptwrite" "-target-feature" "-widekl" "-target-feature" "-movrs" "-target-feature" "+invpcid" "-target-feature" "+64bit" "-target-feature" "-xsavec" "-target-feature" "-avx10.1-512" "-target-feature" "-avx512vpopcntdq" "-target-feature" "+cmov" "-target-feature" "-avx512vp2intersect" "-target-feature" "-avx512cd" "-target-feature" "+movbe" "-target-feature" "-avxvnniint8" "-target-feature" "-ccmp" "-target-feature" "-amx-int8" "-target-feature" "-kl" "-target-feature" "-avx10.1-256" "-target-feature" "-sha512" "-target-feature" "-avxvnni" "-target-feature" "-rtm" "-target-feature" "-adx" "-target-feature" "+avx2" "-target-feature" "-hreset" "-target-feature" "-movdiri" "-target-feature" "-serialize" "-target-feature" "-vpclmulqdq" "-target-feature" "-avx512vl" "-target-feature" "-uintr" "-target-feature" "-cf" "-target-feature" "-clflushopt" "-target-feature" "-raoint" "-target-feature" "-cmpccxadd" "-target-feature" "+bmi" "-target-feature" "-amx-tile" "-target-feature" "+sse" "-target-feature" "-avx10.2-256" "-target-feature" "-gfni" "-target-feature" "-avxvnniint16" "-target-feature" "-amx-fp16" "-target-feature" "-zu" "-target-feature" "-ndd" "-target-feature" "+xsaveopt" "-target-feature" "+rdrnd" "-target-feature" "-avx512f" "-target-feature" "-amx-bf16" "-target-feature" "-avx512bf16" "-target-feature" "-avx512vnni" "-target-feature" "-push2pop2" "-target-feature" "+cx8" "-target-feature" "-avx512bw" "-target-feature" "+sse3" "-target-feature" "-pku" "-target-feature" "-nf" "-target-feature" "-amx-tf32" "-target-feature" "-amx-avx512" "-target-feature" "+fsgsbase" "-target-feature" "-clzero" "-target-feature" "-mwaitx" "-target-feature" "-lwp" "-target-feature" "+lzcnt" "-target-feature" "-sha" "-target-feature" "-movdir64b" "-target-feature" "-ppx" "-target-feature" "-wbnoinvd" "-target-feature" "-enqcmd" "-target-feature" "-amx-transpose" "-target-feature" "-avx10.2-512" "-target-feature" "-avxneconvert" "-target-feature" "-tbm" "-target-feature" "-pconfig" "-target-feature" "-amx-complex" "-target-feature" "+ssse3" "-target-feature" "+cx16" "-target-feature" "+bmi2" "-target-feature" "+fma" "-target-feature" "+popcnt" "-target-feature" "-avxifma" "-target-feature" "+f16c" "-target-feature" "-avx512bitalg" "-target-feature" "-rdpru" "-target-feature" "-clwb" "-target-feature" "+mmx" "-target-feature" "+sse2" "-target-feature" "-rdseed" "-target-feature" "-avx512vbmi2" "-target-feature" "-prefetchi" "-target-feature" "-amx-movrs" "-target-feature" "-rdpid" "-target-feature" "-fma4" "-target-feature" "-avx512vbmi" "-target-feature" "-shstk" "-target-feature" "-vaes" "-target-feature" "-waitpkg" "-target-feature" "-sgx" "-target-feature" "+fxsr" "-target-feature" "-avx512dq" "-target-feature" "-sse4a" "-debugger-tuning=gdb" "-fdebug-compilation-dir=/home/usr00/_gitea/torch-trainer" "-fcoverage-compilation-dir=/home/usr00/_gitea/torch-trainer" "-resource-dir" "/usr/lib/llvm-21/lib/clang/21" "-internal-isystem" "/usr/lib/llvm-21/lib/clang/21/include" "-internal-isystem" "/usr/local/include" "-internal-isystem" "/usr/lib/gcc/x86_64-linux-gnu/14/../../../../x86_64-linux-gnu/include" "-internal-externc-isystem" "/usr/include/x86_64-linux-gnu" "-internal-externc-isystem" "/include" "-internal-externc-isystem" "/usr/include" "-ferror-limit" "19" "-fmessage-length=120" "-fgnuc-version=4.2.1" "-fskip-odr-check-in-gmf" "-fcolor-diagnostics" "-faddrsig" "-D__GCC_HAVE_DWARF2_CFI_ASM=1" "-o" "-" "-x" "c" "-"

gcc -Q -march=native --help=target | grep -v "\[disabled\]"

The following options are target specific:
  -m128bit-long-double                  [enabled]
  -m64                                  [enabled]
  -m80387                               [enabled]
  -mabi=                                sysv
  -mabm                                 [enabled]
  -maddress-mode=                       long
  -maes                                 [enabled]
  -malign-data=                         compat
  -malign-functions=                    0
  -malign-jumps=                        0
  -malign-loops=                        0
  -malign-stringops                     [enabled]
  -mapx-features=                       none
  -march=                               haswell
  -masm=                                att
  -mavx                                 [enabled]
  -mavx10.1                             -mavx10.1-256
  -mavx2                                [enabled]
  -mbmi                                 [enabled]
  -mbmi2                                [enabled]
  -mbranch-cost=<0,5>                   3
  -mcmodel=                             [default]
  -mcpu=
  -mcrc32                               [enabled]
  -mcx16                                [enabled]
  -mdirect-extern-access                [enabled]
  -mf16c                                [enabled]
  -mfancy-math-387                      [enabled]
  -mfentry-name=
  -mfentry-section=
  -mfma                                 [enabled]
  -mfp-ret-in-387                       [enabled]
  -mfpmath=                             sse
  -mfsgsbase                            [enabled]
  -mfunction-return=                    keep
  -mfused-madd                          -ffp-contract=fast
  -mfxsr                                [enabled]
  -mgather                              -mtune-ctrl=use_gather
  -mglibc                               [enabled]
  -mhard-float                          [enabled]
  -mharden-sls=                         none
  -mhle                                 [enabled]
  -mieee-fp                             [enabled]
  -mincoming-stack-boundary=            0
  -mindirect-branch=                    keep
  -minstrument-return=                  none
  -mintel-syntax                        -masm=intel
  -mlam=                                none
  -mlarge-data-threshold=<number>       65536
  -mlong-double-80                      [enabled]
  -mlzcnt                               [enabled]
  -mmemcpy-strategy=
  -mmemset-strategy=
  -mmmx                                 [enabled]
  -mmovbe                               [enabled]
  -mmove-max=                           256
  -mmwait                               [enabled]
  -mpartial-vector-fp-math              [enabled]
  -mpclmul                              [enabled]
  -mpopcnt                              [enabled]
  -mprefer-avx128                       -mprefer-vector-width=128
  -mprefer-vector-width=                none
  -mpreferred-stack-boundary=           0
  -mpush-args                           [enabled]
  -mrdrnd                               [enabled]
  -mrecip=
  -mred-zone                            [enabled]
  -mregparm=                            6
  -msahf                                [enabled]
  -mscatter                             -mtune-ctrl=use_scatter
  -msse                                 [enabled]
  -msse2                                [enabled]
  -msse3                                [enabled]
  -msse4                                [enabled]
  -msse4.1                              [enabled]
  -msse4.2                              [enabled]
  -msse5                                -mavx
  -mssse3                               [enabled]
  -mstack-protector-guard-offset=
  -mstack-protector-guard-reg=
  -mstack-protector-guard-symbol=
  -mstack-protector-guard=              tls
  -mstore-max=                          256
  -mstringop-strategy=                  [default]
  -mstv                                 [enabled]
  -mtls-dialect=                        gnu
  -mtls-direct-seg-refs                 [enabled]
  -mtune-ctrl=
  -mtune=                               haswell
  -mveclibabi=                          [default]
  -mxsave                               [enabled]
  -mxsaveopt                            [enabled]

  Known assembler dialects (for use with the -masm= option):
    att intel

  Known ABIs (for use with the -mabi= option):
    ms sysv

  Known code models (for use with the -mcmodel= option):
    32 kernel large medium small

  Valid arguments to -mfpmath=:
    387 387+sse 387,sse both sse sse+387 sse,387

  Known choices for mitigation against straight line speculation with -mharden-sls=:
    all indirect-jmp none return

  Known indirect branch choices (for use with the -mindirect-branch=/-mfunction-return= options):
    keep thunk thunk-extern thunk-inline

  Known choices for return instrumentation with -minstrument-return=:
    call none nop5

  Known data alignment choices (for use with the -malign-data= option):
    abi cacheline compat

  Known vectorization library ABIs (for use with the -mveclibabi= option):
    acml svml

  Known address mode (for use with the -maddress-mode= option):
    long short

  Known preferred register vector length (to use with the -mprefer-vector-width= option):
    128 256 512 none

  Known stack protector guard (for use with the -mstack-protector-guard= option):
    global tls

  Valid arguments to -mstringop-strategy=:
    byte_loop libcall loop rep_4byte rep_8byte rep_byte unrolled_loop vector_loop

  Known TLS dialects (for use with the -mtls-dialect= option):
    gnu gnu2

  Known valid arguments for -march= option:
    i386 i486 i586 pentium lakemont pentium-mmx winchip-c6 winchip2 c3 samuel-2 c3-2 nehemiah c7 esther i686 pentiumpro pentium2 pentium3 pentium3m pentium-m pentium4 pentium4m prescott nocona core2 nehalem corei7 westmere sandybridge corei7-avx ivybridge core-avx-i haswell core-avx2 broadwell skylake skylake-avx512 cannonlake icelake-client rocketlake icelake-server cascadelake tigerlake cooperlake sapphirerapids emeraldrapids alderlake raptorlake meteorlake graniterapids graniterapids-d arrowlake arrowlake-s lunarlake pantherlake bonnell atom silvermont slm goldmont goldmont-plus tremont gracemont sierraforest grandridge clearwaterforest knl knm intel geode k6 k6-2 k6-3 athlon athlon-tbird athlon-4 athlon-xp athlon-mp x86-64 x86-64-v2 x86-64-v3 x86-64-v4 eden-x2 nano nano-1000 nano-2000 nano-3000 nano-x2 eden-x4 nano-x4 lujiazui yongfeng k8 k8-sse3 opteron opteron-sse3 athlon64 athlon64-sse3 athlon-fx amdfam10 barcelona bdver1 bdver2 bdver3 bdver4 znver1 znver2 znver3 znver4 znver5 btver1 btver2 generic native

  Known valid arguments for -mtune= option:
    generic i386 i486 pentium lakemont pentiumpro pentium4 nocona core2 nehalem sandybridge haswell bonnell silvermont goldmont goldmont-plus tremont sierraforest grandridge clearwaterforest knl knm skylake skylake-avx512 cannonlake icelake-client icelake-server cascadelake tigerlake cooperlake sapphirerapids alderlake rocketlake graniterapids graniterapids-d arrowlake arrowlake-s pantherlake intel lujiazui yongfeng geode k6 athlon k8 amdfam10 bdver1 bdver2 bdver3 bdver4 btver1 btver2 znver1 znver2 znver3 znver4 znver5

AMD Ryzen 7 PRO 7840U w/ Radeon 780M Graphics - Ubuntu 24.04

clang -E - -march=native -###

Ubuntu clang version 21.1.8 (++20251202083326+f68f64eb8130-1~exp1~20251202083450.66)
Target: x86_64-pc-linux-gnu
Thread model: posix
InstalledDir: /usr/lib/llvm-21/bin
 (in-process)
 "/usr/lib/llvm-21/bin/clang" "-cc1" "-triple" "x86_64-pc-linux-gnu" "-E" "-disable-free" "-clear-ast-before-backend" "-disable-llvm-verifier" "-discard-value-names" "-main-file-name" "-" "-mrelocation-model" "pic" "-pic-level" "2" "-pic-is-pie" "-mframe-pointer=all" "-fmath-errno" "-ffp-contract=on" "-fno-rounding-math" "-mconstructor-aliases" "-funwind-tables=2" "-target-cpu" "znver4" "-target-feature" "+prfchw" "-target-feature" "-cldemote" "-target-feature" "+avx" "-target-feature" "+aes" "-target-feature" "+sahf" "-target-feature" "+pclmul" "-target-feature" "-xop" "-target-feature" "+crc32" "-target-feature" "-amx-fp8" "-target-feature" "+xsaves" "-target-feature" "-avx512fp16" "-target-feature" "-usermsr" "-target-feature" "-sm4" "-target-feature" "-egpr" "-target-feature" "+sse4.1" "-target-feature" "+avx512ifma" "-target-feature" "+xsave" "-target-feature" "+sse4.2" "-target-feature" "-tsxldtrk" "-target-feature" "-sm3" "-target-feature" "-ptwrite" "-target-feature" "-widekl" "-target-feature" "-movrs" "-target-feature" "+invpcid" "-target-feature" "+64bit" "-target-feature" "+xsavec" "-target-feature" "-avx10.1-512" "-target-feature" "+avx512vpopcntdq" "-target-feature" "+cmov" "-target-feature" "-avx512vp2intersect" "-target-feature" "+avx512cd" "-target-feature" "+movbe" "-target-feature" "-avxvnniint8" "-target-feature" "-ccmp" "-target-feature" "-amx-int8" "-target-feature" "-kl" "-target-feature" "-avx10.1-256" "-target-feature" "+evex512" "-target-feature" "-avxvnni" "-target-feature" "-rtm" "-target-feature" "+adx" "-target-feature" "+avx2" "-target-feature" "-hreset" "-target-feature" "-movdiri" "-target-feature" "-serialize" "-target-feature" "-sha512" "-target-feature" "+vpclmulqdq" "-target-feature" "+avx512vl" "-target-feature" "-uintr" "-target-feature" "-cf" "-target-feature" "+clflushopt" "-target-feature" "-raoint" "-target-feature" "-cmpccxadd" "-target-feature" "+bmi" "-target-feature" "-amx-tile" "-target-feature" "+sse" "-target-feature" "-avx10.2-256" "-target-feature" "+gfni" "-target-feature" "-avxvnniint16" "-target-feature" "-amx-fp16" "-target-feature" "-zu" "-target-feature" "-ndd" "-target-feature" "+xsaveopt" "-target-feature" "+rdrnd" "-target-feature" "+avx512f" "-target-feature" "-amx-bf16" "-target-feature" "+avx512bf16" "-target-feature" "+avx512vnni" "-target-feature" "-push2pop2" "-target-feature" "+cx8" "-target-feature" "+avx512bw" "-target-feature" "+sse3" "-target-feature" "-pku" "-target-feature" "-nf" "-target-feature" "-amx-tf32" "-target-feature" "-amx-avx512" "-target-feature" "+fsgsbase" "-target-feature" "+clzero" "-target-feature" "-mwaitx" "-target-feature" "-lwp" "-target-feature" "+lzcnt" "-target-feature" "+sha" "-target-feature" "-movdir64b" "-target-feature" "-ppx" "-target-feature" "-wbnoinvd" "-target-feature" "-enqcmd" "-target-feature" "-amx-transpose" "-target-feature" "-avx10.2-512" "-target-feature" "-avxneconvert" "-target-feature" "-tbm" "-target-feature" "-pconfig" "-target-feature" "-amx-complex" "-target-feature" "+ssse3" "-target-feature" "+cx16" "-target-feature" "+bmi2" "-target-feature" "+fma" "-target-feature" "+popcnt" "-target-feature" "-avxifma" "-target-feature" "+f16c" "-target-feature" "+avx512bitalg" "-target-feature" "-rdpru" "-target-feature" "+clwb" "-target-feature" "+mmx" "-target-feature" "+sse2" "-target-feature" "+rdseed" "-target-feature" "+avx512vbmi2" "-target-feature" "-prefetchi" "-target-feature" "-amx-movrs" "-target-feature" "+rdpid" "-target-feature" "-fma4" "-target-feature" "+avx512vbmi" "-target-feature" "+shstk" "-target-feature" "+vaes" "-target-feature" "-waitpkg" "-target-feature" "-sgx" "-target-feature" "+fxsr" "-target-feature" "+avx512dq" "-target-feature" "+sse4a" "-debugger-tuning=gdb" "-fdebug-compilation-dir=/home/usr00" "-fcoverage-compilation-dir=/home/usr00" "-resource-dir" "/usr/lib/llvm-21/lib/clang/21" "-internal-isystem" "/usr/lib/llvm-21/lib/clang/21/include" "-internal-isystem" "/usr/local/include" "-internal-isystem" "/usr/lib/gcc/x86_64-linux-gnu/14/../../../../x86_64-linux-gnu/include" "-internal-externc-isystem" "/usr/include/x86_64-linux-gnu" "-internal-externc-isystem" "/include" "-internal-externc-isystem" "/usr/include" "-ferror-limit" "19" "-fmessage-length=120" "-fgnuc-version=4.2.1" "-fskip-odr-check-in-gmf" "-fcolor-diagnostics" "-faddrsig" "-D__GCC_HAVE_DWARF2_CFI_ASM=1" "-o" "-" "-x" "c" "-"

gcc -Q -march=native --help=target | grep -v "\[disabled\]"

The following options are target specific:
  -m128bit-long-double                  [enabled]
  -m64                                  [enabled]
  -m80387                               [enabled]
  -mabi=                                sysv
  -mabm                                 [enabled]
  -maddress-mode=                       long
  -madx                                 [enabled]
  -maes                                 [enabled]
  -malign-data=                         compat
  -malign-functions=                    0
  -malign-jumps=                        0
  -malign-loops=                        0
  -malign-stringops                     [enabled]
  -mapx-features=                       none
  -march=                               znver4
  -masm=                                att
  -mavx                                 [enabled]
  -mavx10.1                             -mavx10.1-256
  -mavx2                                [enabled]
  -mavx512bf16                          [enabled]
  -mavx512bitalg                        [enabled]
  -mavx512bw                            [enabled]
  -mavx512cd                            [enabled]
  -mavx512dq                            [enabled]
  -mavx512f                             [enabled]
  -mavx512ifma                          [enabled]
  -mavx512vbmi                          [enabled]
  -mavx512vbmi2                         [enabled]
  -mavx512vl                            [enabled]
  -mavx512vnni                          [enabled]
  -mavx512vpopcntdq                     [enabled]
  -mbmi                                 [enabled]
  -mbmi2                                [enabled]
  -mbranch-cost=<0,5>                   3
  -mclflushopt                          [enabled]
  -mclwb                                [enabled]
  -mclzero                              [enabled]
  -mcmodel=                             [default]
  -mcpu=
  -mcrc32                               [enabled]
  -mcx16                                [enabled]
  -mdirect-extern-access                [enabled]
  -mevex512                             [enabled]
  -mf16c                                [enabled]
  -mfancy-math-387                      [enabled]
  -mfentry-name=
  -mfentry-section=
  -mfma                                 [enabled]
  -mfp-ret-in-387                       [enabled]
  -mfpmath=                             sse
  -mfsgsbase                            [enabled]
  -mfunction-return=                    keep
  -mfused-madd                          -ffp-contract=fast
  -mfxsr                                [enabled]
  -mgather                              -mtune-ctrl=use_gather
  -mgfni                                [enabled]
  -mglibc                               [enabled]
  -mhard-float                          [enabled]
  -mharden-sls=                         none
  -mieee-fp                             [enabled]
  -mincoming-stack-boundary=            0
  -mindirect-branch=                    keep
  -minstrument-return=                  none
  -mintel-syntax                        -masm=intel
  -mlam=                                none
  -mlarge-data-threshold=<number>       65536
  -mlong-double-80                      [enabled]
  -mlzcnt                               [enabled]
  -mmemcpy-strategy=
  -mmemset-strategy=
  -mmmx                                 [enabled]
  -mmovbe                               [enabled]
  -mmove-max=                           512
  -mmwait                               [enabled]
  -mpartial-vector-fp-math              [enabled]
  -mpclmul                              [enabled]
  -mpopcnt                              [enabled]
  -mprefer-avx128                       -mprefer-vector-width=128
  -mprefer-vector-width=                none
  -mpreferred-stack-boundary=           0
  -mprfchw                              [enabled]
  -mpush-args                           [enabled]
  -mrdpid                               [enabled]
  -mrdrnd                               [enabled]
  -mrdseed                              [enabled]
  -mrecip=
  -mred-zone                            [enabled]
  -mregparm=                            6
  -msahf                                [enabled]
  -mscatter                             -mtune-ctrl=use_scatter
  -msha                                 [enabled]
  -mshstk                               [enabled]
  -msse                                 [enabled]
  -msse2                                [enabled]
  -msse3                                [enabled]
  -msse4                                [enabled]
  -msse4.1                              [enabled]
  -msse4.2                              [enabled]
  -msse4a                               [enabled]
  -msse5                                -mavx
  -mssse3                               [enabled]
  -mstack-protector-guard-offset=
  -mstack-protector-guard-reg=
  -mstack-protector-guard-symbol=
  -mstack-protector-guard=              tls
  -mstore-max=                          512
  -mstringop-strategy=                  [default]
  -mstv                                 [enabled]
  -mtls-dialect=                        gnu
  -mtls-direct-seg-refs                 [enabled]
  -mtune-ctrl=
  -mtune=                               znver4
  -mvaes                                [enabled]
  -mveclibabi=                          [default]
  -mvpclmulqdq                          [enabled]
  -mxsave                               [enabled]
  -mxsavec                              [enabled]
  -mxsaveopt                            [enabled]
  -mxsaves                              [enabled]

  Known assembler dialects (for use with the -masm= option):
    att intel

  Known ABIs (for use with the -mabi= option):
    ms sysv

  Known code models (for use with the -mcmodel= option):
    32 kernel large medium small

  Valid arguments to -mfpmath=:
    387 387+sse 387,sse both sse sse+387 sse,387

  Known choices for mitigation against straight line speculation with -mharden-sls=:
    all indirect-jmp none return

  Known indirect branch choices (for use with the -mindirect-branch=/-mfunction-return= options):
    keep thunk thunk-extern thunk-inline

  Known choices for return instrumentation with -minstrument-return=:
    call none nop5

  Known data alignment choices (for use with the -malign-data= option):
    abi cacheline compat

  Known vectorization library ABIs (for use with the -mveclibabi= option):
    acml svml

  Known address mode (for use with the -maddress-mode= option):
    long short

  Known preferred register vector length (to use with the -mprefer-vector-width= option):
    128 256 512 none

  Known stack protector guard (for use with the -mstack-protector-guard= option):
    global tls

  Valid arguments to -mstringop-strategy=:
    byte_loop libcall loop rep_4byte rep_8byte rep_byte unrolled_loop vector_loop

  Known TLS dialects (for use with the -mtls-dialect= option):
    gnu gnu2

  Known valid arguments for -march= option:
    i386 i486 i586 pentium lakemont pentium-mmx winchip-c6 winchip2 c3 samuel-2 c3-2 nehemiah c7 esther i686 pentiumpro pentium2 pentium3 pentium3m pentium-m pentium4 pentium4m prescott nocona core2 nehalem corei7 westmere sandybridge corei7-avx ivybridge core-avx-i haswell core-avx2 broadwell skylake skylake-avx512 cannonlake icelake-client rocketlake icelake-server cascadelake tigerlake cooperlake sapphirerapids emeraldrapids alderlake raptorlake meteorlake graniterapids graniterapids-d arrowlake arrowlake-s lunarlake pantherlake bonnell atom silvermont slm goldmont goldmont-plus tremont gracemont sierraforest grandridge clearwaterforest knl knm intel geode k6 k6-2 k6-3 athlon athlon-tbird athlon-4 athlon-xp athlon-mp x86-64 x86-64-v2 x86-64-v3 x86-64-v4 eden-x2 nano nano-1000 nano-2000 nano-3000 nano-x2 eden-x4 nano-x4 lujiazui yongfeng k8 k8-sse3 opteron opteron-sse3 athlon64 athlon64-sse3 athlon-fx amdfam10 barcelona bdver1 bdver2 bdver3 bdver4 znver1 znver2 znver3 znver4 znver5 btver1 btver2 generic native

  Known valid arguments for -mtune= option:
    generic i386 i486 pentium lakemont pentiumpro pentium4 nocona core2 nehalem sandybridge haswell bonnell silvermont goldmont goldmont-plus tremont sierraforest grandridge clearwaterforest knl knm skylake skylake-avx512 cannonlake icelake-client icelake-server cascadelake tigerlake cooperlake sapphirerapids alderlake rocketlake graniterapids graniterapids-d arrowlake arrowlake-s pantherlake intel lujiazui yongfeng geode k6 athlon k8 amdfam10 bdver1 bdver2 bdver3 bdver4 btver1 btver2 znver1 znver2 znver3 znver4 znver5

Intel(R) Xeon(R) CPU E3-1245 V2 @ 3.40GHz - Ubuntu 20.04

gcc -Q -march=native --help=target | grep -v "\[disabled\]"

The following options are target specific:
  -m128bit-long-double                  [enabled]
  -m64                                  [enabled]
  -m80387                               [enabled]
  -mabi=                                sysv
  -maddress-mode=                       long
  -maes                                 [enabled]
  -malign-data=                         compat
  -malign-functions=                    0
  -malign-jumps=                        0
  -malign-loops=                        0
  -malign-stringops                     [enabled]
  -march=                               ivybridge
  -masm=                                att
  -mavx                                 [enabled]
  -mavx256-split-unaligned-load         [enabled]
  -mavx256-split-unaligned-store        [enabled]
  -mbranch-cost=<0,5>                   3
  -mcmodel=                             [default]
  -mcpu=
  -mcrc32                               [enabled]
  -mcx16                                [enabled]
  -mf16c                                [enabled]
  -mfancy-math-387                      [enabled]
  -mfentry-name=
  -mfentry-section=
  -mfp-ret-in-387                       [enabled]
  -mfpmath=                             sse
  -mfsgsbase                            [enabled]
  -mfunction-return=                    keep
  -mfused-madd                          -ffp-contract=fast
  -mfxsr                                [enabled]
  -mglibc                               [enabled]
  -mhard-float                          [enabled]
  -mharden-sls=                         none
  -mieee-fp                             [enabled]
  -mincoming-stack-boundary=            0
  -mindirect-branch=                    keep
  -minstrument-return=                  none
  -mintel-syntax                        -masm=intel
  -mlarge-data-threshold=<number>       65536
  -mlong-double-80                      [enabled]
  -mmemcpy-strategy=
  -mmemset-strategy=
  -mmmx                                 [enabled]
  -mmwait                               [enabled]
  -mpclmul                              [enabled]
  -mpopcnt                              [enabled]
  -mprefer-avx128                       -mprefer-vector-width=128
  -mprefer-vector-width=                none
  -mpreferred-stack-boundary=           0
  -mpush-args                           [enabled]
  -mrdrnd                               [enabled]
  -mrecip=
  -mred-zone                            [enabled]
  -mregparm=                            6
  -msahf                                [enabled]
  -msse                                 [enabled]
  -msse2                                [enabled]
  -msse3                                [enabled]
  -msse4                                [enabled]
  -msse4.1                              [enabled]
  -msse4.2                              [enabled]
  -msse5                                -mavx
  -mssse3                               [enabled]
  -mstack-protector-guard-offset=
  -mstack-protector-guard-reg=
  -mstack-protector-guard-symbol=
  -mstack-protector-guard=              tls
  -mstringop-strategy=                  [default]
  -mstv                                 [enabled]
  -mtls-dialect=                        gnu
  -mtls-direct-seg-refs                 [enabled]
  -mtune-ctrl=
  -mtune=                               ivybridge
  -mveclibabi=                          [default]
  -mvzeroupper                          [enabled]
  -mxsave                               [enabled]
  -mxsaveopt                            [enabled]

  Known assembler dialects (for use with the -masm= option):
    att intel

  Known ABIs (for use with the -mabi= option):
    ms sysv

  Known code models (for use with the -mcmodel= option):
    32 kernel large medium small

  Valid arguments to -mfpmath=:
    387 387+sse 387,sse both sse sse+387 sse,387

  Known choices for mitigation against straight line speculation with -mharden-s                                                                                                                                                             ls=:
    all indirect-jmp none return

  Known indirect branch choices (for use with the -mindirect-branch=/-mfunction-                                                                                                                                                             return= options):
    keep thunk thunk-extern thunk-inline

  Known choices for return instrumentation with -minstrument-return=:
    call none nop5

  Known data alignment choices (for use with the -malign-data= option):
    abi cacheline compat

  Known vectorization library ABIs (for use with the -mveclibabi= option):
    acml svml

  Known address mode (for use with the -maddress-mode= option):
    long short

  Known preferred register vector length (to use with the -mprefer-vector-width=                                                                                                                                                              option):
    128 256 512 none

  Known stack protector guard (for use with the -mstack-protector-guard= option)                                                                                                                                                             :
    global tls

  Valid arguments to -mstringop-strategy=:
    byte_loop libcall loop rep_4byte rep_8byte rep_byte unrolled_loop
    vector_loop

  Known TLS dialects (for use with the -mtls-dialect= option):
    gnu gnu2

  Known valid arguments for -march= option:
    i386 i486 i586 pentium lakemont pentium-mmx winchip-c6 winchip2 c3 samuel-2                                                                                                                                                              c3-2 nehemiah c7 esther i686 pentiumpro pentium2 pentium3 pentium3m pentium-m pe                                                                                                                                                             ntium4 pentium4m prescott nocona core2 nehalem corei7 westmere sandybridge corei                                                                                                                                                             7-avx ivybridge core-avx-i haswell core-avx2 broadwell skylake skylake-avx512 ca                                                                                                                                                             nnonlake icelake-client rocketlake icelake-server cascadelake tigerlake cooperla                                                                                                                                                             ke sapphirerapids alderlake bonnell atom silvermont slm goldmont goldmont-plus t                                                                                                                                                             remont knl knm intel geode k6 k6-2 k6-3 athlon athlon-tbird athlon-4 athlon-xp a                                                                                                                                                             thlon-mp x86-64 x86-64-v2 x86-64-v3 x86-64-v4 eden-x2 nano nano-1000 nano-2000 n                                                                                                                                                             ano-3000 nano-x2 eden-x4 nano-x4 k8 k8-sse3 opteron opteron-sse3 athlon64 athlon                                                                                                                                                             64-sse3 athlon-fx amdfam10 barcelona bdver1 bdver2 bdver3 bdver4 znver1 znver2 z                                                                                                                                                             nver3 btver1 btver2 generic native

  Known valid arguments for -mtune= option:
    generic i386 i486 pentium lakemont pentiumpro pentium4 nocona core2 nehalem                                                                                                                                                              sandybridge haswell bonnell silvermont goldmont goldmont-plus tremont knl knm sk                                                                                                                                                             ylake skylake-avx512 cannonlake icelake-client icelake-server cascadelake tigerl                                                                                                                                                             ake cooperlake sapphirerapids alderlake rocketlake intel geode k6 athlon k8 amdf                                                                                                                                                             am10 bdver1 bdver2 bdver3 bdver4 btver1 btver2 znver1 znver2 znver3

Intel(R) Xeon(R) E-2234 CPU @ 3.60GHz - Ubuntu 24.04

clang -E - -march=native -###

Ubuntu clang version 21.1.8 (++20251202083326+f68f64eb8130-1~exp1~20251202083450.66)
Target: x86_64-pc-linux-gnu
Thread model: posix
InstalledDir: /usr/lib/llvm-21/bin
 (in-process)
 "/usr/lib/llvm-21/bin/clang" "-cc1" "-triple" "x86_64-pc-linux-gnu" "-E" "-disable-free" "-clear-ast-before-backend" "-disable-llvm-verifier" "-discard-value-names" "-main-file-name" "-" "-mrelocation-model" "pic" "-pic-level" "2" "-pic-is-pie" "-mframe-pointer=all" "-fmath-errno" "-ffp-contract=on" "-fno-rounding-math" "-mconstructor-aliases" "-funwind-tables=2" "-target-cpu" "skylake" "-target-feature" "+prfchw" "-target-feature" "-cldemote" "-target-feature" "+avx" "-target-feature" "+aes" "-target-feature" "+sahf" "-target-feature" "+pclmul" "-target-feature" "-xop" "-target-feature" "+crc32" "-target-feature" "-amx-fp8" "-target-feature" "+xsaves" "-target-feature" "-avx512fp16" "-target-feature" "-usermsr" "-target-feature" "-sm4" "-target-feature" "-egpr" "-target-feature" "+sse4.1" "-target-feature" "-avx512ifma" "-target-feature" "+xsave" "-target-feature" "+sse4.2" "-target-feature" "-tsxldtrk" "-target-feature" "-sm3" "-target-feature" "-ptwrite" "-target-feature" "-widekl" "-target-feature" "-movrs" "-target-feature" "+invpcid" "-target-feature" "+64bit" "-target-feature" "+xsavec" "-target-feature" "-avx10.1-512" "-target-feature" "-avx512vpopcntdq" "-target-feature" "+cmov" "-target-feature" "-avx512vp2intersect" "-target-feature" "-avx512cd" "-target-feature" "+movbe" "-target-feature" "-avxvnniint8" "-target-feature" "-ccmp" "-target-feature" "-amx-int8" "-target-feature" "-kl" "-target-feature" "-avx10.1-256" "-target-feature" "-sha512" "-target-feature" "-avxvnni" "-target-feature" "-rtm" "-target-feature" "+adx" "-target-feature" "+avx2" "-target-feature" "-hreset" "-target-feature" "-movdiri" "-target-feature" "-serialize" "-target-feature" "-vpclmulqdq" "-target-feature" "-avx512vl" "-target-feature" "-uintr" "-target-feature" "-cf" "-target-feature" "+clflushopt" "-target-feature" "-raoint" "-target-feature" "-cmpccxadd" "-target-feature" "+bmi" "-target-feature" "-amx-tile" "-target-feature" "+sse" "-target-feature" "-avx10.2-256" "-target-feature" "-gfni" "-target-feature" "-avxvnniint16" "-target-feature" "-amx-fp16" "-target-feature" "-zu" "-target-feature" "-ndd" "-target-feature" "+xsaveopt" "-target-feature" "+rdrnd" "-target-feature" "-avx512f" "-target-feature" "-amx-bf16" "-target-feature" "-avx512bf16" "-target-feature" "-avx512vnni" "-target-feature" "-push2pop2" "-target-feature" "+cx8" "-target-feature" "-avx512bw" "-target-feature" "+sse3" "-target-feature" "-pku" "-target-feature" "-nf" "-target-feature" "-amx-tf32" "-target-feature" "-amx-avx512" "-target-feature" "+fsgsbase" "-target-feature" "-clzero" "-target-feature" "-mwaitx" "-target-feature" "-lwp" "-target-feature" "+lzcnt" "-target-feature" "-sha" "-target-feature" "-movdir64b" "-target-feature" "-ppx" "-target-feature" "-wbnoinvd" "-target-feature" "-enqcmd" "-target-feature" "-amx-transpose" "-target-feature" "-avx10.2-512" "-target-feature" "-avxneconvert" "-target-feature" "-tbm" "-target-feature" "-pconfig" "-target-feature" "-amx-complex" "-target-feature" "+ssse3" "-target-feature" "+cx16" "-target-feature" "+bmi2" "-target-feature" "+fma" "-target-feature" "+popcnt" "-target-feature" "-avxifma" "-target-feature" "+f16c" "-target-feature" "-avx512bitalg" "-target-feature" "-rdpru" "-target-feature" "-clwb" "-target-feature" "+mmx" "-target-feature" "+sse2" "-target-feature" "+rdseed" "-target-feature" "-avx512vbmi2" "-target-feature" "-prefetchi" "-target-feature" "-amx-movrs" "-target-feature" "-rdpid" "-target-feature" "-fma4" "-target-feature" "-avx512vbmi" "-target-feature" "-shstk" "-target-feature" "-vaes" "-target-feature" "-waitpkg" "-target-feature" "-sgx" "-target-feature" "+fxsr" "-target-feature" "-avx512dq" "-target-feature" "-sse4a" "-debugger-tuning=gdb" "-fdebug-compilation-dir=/home/usr00" "-fcoverage-compilation-dir=/home/usr00" "-resource-dir" "/usr/lib/llvm-21/lib/clang/21" "-internal-isystem" "/usr/lib/llvm-21/lib/clang/21/include" "-internal-isystem" "/usr/local/include" "-internal-isystem" "/usr/lib/gcc/x86_64-linux-gnu/14/../../../../x86_64-linux-gnu/include" "-internal-externc-isystem" "/usr/include/x86_64-linux-gnu" "-internal-externc-isystem" "/include" "-internal-externc-isystem" "/usr/include" "-ferror-limit" "19" "-fmessage-length=237" "-fgnuc-version=4.2.1" "-fskip-odr-check-in-gmf" "-fcolor-diagnostics" "-faddrsig" "-D__GCC_HAVE_DWARF2_CFI_ASM=1" "-o" "-" "-x" "c" "-"

gcc -Q -march=native --help=target | grep -v "\[disabled\]"

The following options are target specific:
  -m128bit-long-double                  [enabled]
  -m64                                  [enabled]
  -m80387                               [enabled]
  -mabi=                                sysv
  -mabm                                 [enabled]
  -maddress-mode=                       long
  -madx                                 [enabled]
  -maes                                 [enabled]
  -malign-data=                         compat
  -malign-functions=                    0
  -malign-jumps=                        0
  -malign-loops=                        0
  -malign-stringops                     [enabled]
  -mapx-features=                       none
  -march=                               skylake
  -masm=                                att
  -mavx                                 [enabled]
  -mavx10.1                             -mavx10.1-256
  -mavx2                                [enabled]
  -mbmi                                 [enabled]
  -mbmi2                                [enabled]
  -mbranch-cost=<0,5>                   3
  -mclflushopt                          [enabled]
  -mcmodel=                             [default]
  -mcpu=
  -mcrc32                               [enabled]
  -mcx16                                [enabled]
  -mdirect-extern-access                [enabled]
  -mf16c                                [enabled]
  -mfancy-math-387                      [enabled]
  -mfentry-name=
  -mfentry-section=
  -mfma                                 [enabled]
  -mfp-ret-in-387                       [enabled]
  -mfpmath=                             sse
  -mfsgsbase                            [enabled]
  -mfunction-return=                    keep
  -mfused-madd                          -ffp-contract=fast
  -mfxsr                                [enabled]
  -mgather                              -mtune-ctrl=use_gather
  -mglibc                               [enabled]
  -mhard-float                          [enabled]
  -mharden-sls=                         none
  -mhle                                 [enabled]
  -mieee-fp                             [enabled]
  -mincoming-stack-boundary=            0
  -mindirect-branch=                    keep
  -minstrument-return=                  none
  -mintel-syntax                        -masm=intel
  -mlam=                                none
  -mlarge-data-threshold=<number>       65536
  -mlong-double-80                      [enabled]
  -mlzcnt                               [enabled]
  -mmemcpy-strategy=
  -mmemset-strategy=
  -mmmx                                 [enabled]
  -mmovbe                               [enabled]
  -mmove-max=                           256
  -mmwait                               [enabled]
  -mpartial-vector-fp-math              [enabled]
  -mpclmul                              [enabled]
  -mpopcnt                              [enabled]
  -mprefer-avx128                       -mprefer-vector-width=128
  -mprefer-vector-width=                none
  -mpreferred-stack-boundary=           0
  -mprfchw                              [enabled]
  -mpush-args                           [enabled]
  -mrdrnd                               [enabled]
  -mrdseed                              [enabled]
  -mrecip=
  -mred-zone                            [enabled]
  -mregparm=                            6
  -msahf                                [enabled]
  -mscatter                             -mtune-ctrl=use_scatter
  -msse                                 [enabled]
  -msse2                                [enabled]
  -msse3                                [enabled]
  -msse4                                [enabled]
  -msse4.1                              [enabled]
  -msse4.2                              [enabled]
  -msse5                                -mavx
  -mssse3                               [enabled]
  -mstack-protector-guard-offset=
  -mstack-protector-guard-reg=
  -mstack-protector-guard-symbol=
  -mstack-protector-guard=              tls
  -mstore-max=                          256
  -mstringop-strategy=                  [default]
  -mstv                                 [enabled]
  -mtls-dialect=                        gnu
  -mtls-direct-seg-refs                 [enabled]
  -mtune-ctrl=
  -mtune=                               skylake
  -mveclibabi=                          [default]
  -mxsave                               [enabled]
  -mxsavec                              [enabled]
  -mxsaveopt                            [enabled]
  -mxsaves                              [enabled]

  Known assembler dialects (for use with the -masm= option):
    att intel

  Known ABIs (for use with the -mabi= option):
    ms sysv

  Known code models (for use with the -mcmodel= option):
    32 kernel large medium small

  Valid arguments to -mfpmath=:
    387 387+sse 387,sse both sse sse+387 sse,387

  Known choices for mitigation against straight line speculation with -mharden-sls=:
    all indirect-jmp none return

  Known indirect branch choices (for use with the -mindirect-branch=/-mfunction-return= options):
    keep thunk thunk-extern thunk-inline

  Known choices for return instrumentation with -minstrument-return=:
    call none nop5

  Known data alignment choices (for use with the -malign-data= option):
    abi cacheline compat

  Known vectorization library ABIs (for use with the -mveclibabi= option):
    acml svml

  Known address mode (for use with the -maddress-mode= option):
    long short

  Known preferred register vector length (to use with the -mprefer-vector-width= option):
    128 256 512 none

  Known stack protector guard (for use with the -mstack-protector-guard= option):
    global tls

  Valid arguments to -mstringop-strategy=:
    byte_loop libcall loop rep_4byte rep_8byte rep_byte unrolled_loop vector_loop

  Known TLS dialects (for use with the -mtls-dialect= option):
    gnu gnu2

  Known valid arguments for -march= option:
    i386 i486 i586 pentium lakemont pentium-mmx winchip-c6 winchip2 c3 samuel-2 c3-2 nehemiah c7 esther i686 pentiumpro pentium2 pentium3 pentium3m pentium-m pentium4 pentium4m prescott nocona core2 nehalem corei7 westmere sandybridge corei7-avx ivybridge core-avx-i haswell core-avx2 broadwell skylake skylake-avx512 cannonlake icelake-client rocketlake icelake-server cascadelake tigerlake cooperlake sapphirerapids emeraldrapids alderlake raptorlake meteorlake graniterapids graniterapids-d arrowlake arrowlake-s lunarlake pantherlake bonnell atom silvermont slm goldmont goldmont-plus tremont gracemont sierraforest grandridge clearwaterforest knl knm intel geode k6 k6-2 k6-3 athlon athlon-tbird athlon-4 athlon-xp athlon-mp x86-64 x86-64-v2 x86-64-v3 x86-64-v4 eden-x2 nano nano-1000 nano-2000 nano-3000 nano-x2 eden-x4 nano-x4 lujiazui yongfeng k8 k8-sse3 opteron opteron-sse3 athlon64 athlon64-sse3 athlon-fx amdfam10 barcelona bdver1 bdver2 bdver3 bdver4 znver1 znver2 znver3 znver4 znver5 btver1 btver2 generic native

  Known valid arguments for -mtune= option:
    generic i386 i486 pentium lakemont pentiumpro pentium4 nocona core2 nehalem sandybridge haswell bonnell silvermont goldmont goldmont-plus tremont sierraforest grandridge clearwaterforest knl knm skylake skylake-avx512 cannonlake icelake-client icelake-server cascadelake tigerlake cooperlake sapphirerapids alderlake rocketlake graniterapids graniterapids-d arrowlake arrowlake-s pantherlake intel lujiazui yongfeng geode k6 athlon k8 amdfam10 bdver1 bdver2 bdver3 bdver4 btver1 btver2 znver1 znver2 znver3 znver4 znver5

Intel(R) Core(TM) i7-3770K CPU @ 3.50GHz - Ubuntu 24.04

clang -E - -march=native -###

Ubuntu clang version 21.1.8 (++20251202083326+f68f64eb8130-1~exp1~20251202083450.66)
Target: x86_64-pc-linux-gnu
Thread model: posix
InstalledDir: /usr/lib/llvm-21/bin
 (in-process)
 "/usr/lib/llvm-21/bin/clang" "-cc1" "-triple" "x86_64-pc-linux-gnu" "-E" "-disable-free" "-clear-ast-before-backend" "-disable-llvm-verifier" "-discard-value-names" "-main-file-name" "-" "-mrelocation-model" "pic" "-pic-level" "2" "-pic-is-pie" "-mframe-pointer=all" "-fmath-errno" "-ffp-contract=on" "-fno-rounding-math" "-mconstructor-aliases" "-funwind-tables=2" "-target-cpu" "ivybridge" "-target-feature" "-prfchw" "-target-feature" "-cldemote" "-target-feature" "+avx" "-target-feature" "+aes" "-target-feature" "+sahf" "-target-feature" "+pclmul" "-target-feature" "-xop" "-target-feature" "+crc32" "-target-feature" "-amx-fp8" "-target-feature" "-xsaves" "-target-feature" "-avx512fp16" "-target-feature" "-usermsr" "-target-feature" "-sm4" "-target-feature" "-egpr" "-target-feature" "+sse4.1" "-target-feature" "-avx512ifma" "-target-feature" "+xsave" "-target-feature" "+sse4.2" "-target-feature" "-tsxldtrk" "-target-feature" "-sm3" "-target-feature" "-ptwrite" "-target-feature" "-widekl" "-target-feature" "-movrs" "-target-feature" "-invpcid" "-target-feature" "+64bit" "-target-feature" "-xsavec" "-target-feature" "-avx10.1-512" "-target-feature" "-avx512vpopcntdq" "-target-feature" "+cmov" "-target-feature" "-avx512vp2intersect" "-target-feature" "-avx512cd" "-target-feature" "-movbe" "-target-feature" "-avxvnniint8" "-target-feature" "-ccmp" "-target-feature" "-amx-int8" "-target-feature" "-kl" "-target-feature" "-avx10.1-256" "-target-feature" "-sha512" "-target-feature" "-avxvnni" "-target-feature" "-rtm" "-target-feature" "-adx" "-target-feature" "-avx2" "-target-feature" "-hreset" "-target-feature" "-movdiri" "-target-feature" "-serialize" "-target-feature" "-vpclmulqdq" "-target-feature" "-avx512vl" "-target-feature" "-uintr" "-target-feature" "-cf" "-target-feature" "-clflushopt" "-target-feature" "-raoint" "-target-feature" "-cmpccxadd" "-target-feature" "-bmi" "-target-feature" "-amx-tile" "-target-feature" "+sse" "-target-feature" "-avx10.2-256" "-target-feature" "-gfni" "-target-feature" "-avxvnniint16" "-target-feature" "-amx-fp16" "-target-feature" "-zu" "-target-feature" "-ndd" "-target-feature" "+xsaveopt" "-target-feature" "+rdrnd" "-target-feature" "-avx512f" "-target-feature" "-amx-bf16" "-target-feature" "-avx512bf16" "-target-feature" "-avx512vnni" "-target-feature" "-push2pop2" "-target-feature" "+cx8" "-target-feature" "-avx512bw" "-target-feature" "+sse3" "-target-feature" "-pku" "-target-feature" "-nf" "-target-feature" "-amx-tf32" "-target-feature" "-amx-avx512" "-target-feature" "+fsgsbase" "-target-feature" "-clzero" "-target-feature" "-mwaitx" "-target-feature" "-lwp" "-target-feature" "-lzcnt" "-target-feature" "-sha" "-target-feature" "-movdir64b" "-target-feature" "-ppx" "-target-feature" "-wbnoinvd" "-target-feature" "-enqcmd" "-target-feature" "-amx-transpose" "-target-feature" "-avx10.2-512" "-target-feature" "-avxneconvert" "-target-feature" "-tbm" "-target-feature" "-pconfig" "-target-feature" "-amx-complex" "-target-feature" "+ssse3" "-target-feature" "+cx16" "-target-feature" "-bmi2" "-target-feature" "-fma" "-target-feature" "+popcnt" "-target-feature" "-avxifma" "-target-feature" "+f16c" "-target-feature" "-avx512bitalg" "-target-feature" "-rdpru" "-target-feature" "-clwb" "-target-feature" "+mmx" "-target-feature" "+sse2" "-target-feature" "-rdseed" "-target-feature" "-avx512vbmi2" "-target-feature" "-prefetchi" "-target-feature" "-amx-movrs" "-target-feature" "-rdpid" "-target-feature" "-fma4" "-target-feature" "-avx512vbmi" "-target-feature" "-shstk" "-target-feature" "-vaes" "-target-feature" "-waitpkg" "-target-feature" "-sgx" "-target-feature" "+fxsr" "-target-feature" "-avx512dq" "-target-feature" "-sse4a" "-debugger-tuning=gdb" "-fdebug-compilation-dir=/home/usr00/_rust/guessing_game" "-fcoverage-compilation-dir=/home/usr00/_rust/guessing_game" "-resource-dir" "/usr/lib/llvm-21/lib/clang/21" "-internal-isystem" "/usr/lib/llvm-21/lib/clang/21/include" "-internal-isystem" "/usr/local/include" "-internal-isystem" "/usr/lib/gcc/x86_64-linux-gnu/14/../../../../x86_64-linux-gnu/include" "-internal-externc-isystem" "/usr/include/x86_64-linux-gnu" "-internal-externc-isystem" "/include" "-internal-externc-isystem" "/usr/include" "-ferror-limit" "19" "-fmessage-length=120" "-fgnuc-version=4.2.1" "-fskip-odr-check-in-gmf" "-fcolor-diagnostics" "-faddrsig" "-D__GCC_HAVE_DWARF2_CFI_ASM=1" "-o" "-" "-x" "c" "-"

gcc -Q -march=native --help=target | grep -v "\[disabled\]"

The following options are target specific:
  -m128bit-long-double                  [enabled]
  -m64                                  [enabled]
  -m80387                               [enabled]
  -mabi=                                sysv
  -maddress-mode=                       long
  -maes                                 [enabled]
  -malign-data=                         compat
  -malign-functions=                    0
  -malign-jumps=                        0
  -malign-loops=                        0
  -malign-stringops                     [enabled]
  -mapx-features=                       none
  -march=                               ivybridge
  -masm=                                att
  -mavx                                 [enabled]
  -mavx10.1                             -mavx10.1-256
  -mavx256-split-unaligned-load         [enabled]
  -mavx256-split-unaligned-store        [enabled]
  -mbranch-cost=<0,5>                   3
  -mcmodel=                             [default]
  -mcpu=
  -mcrc32                               [enabled]
  -mcx16                                [enabled]
  -mdirect-extern-access                [enabled]
  -mf16c                                [enabled]
  -mfancy-math-387                      [enabled]
  -mfentry-name=
  -mfentry-section=
  -mfp-ret-in-387                       [enabled]
  -mfpmath=                             sse
  -mfsgsbase                            [enabled]
  -mfunction-return=                    keep
  -mfused-madd                          -ffp-contract=fast
  -mfxsr                                [enabled]
  -mgather                              -mtune-ctrl=use_gather
  -mglibc                               [enabled]
  -mhard-float                          [enabled]
  -mharden-sls=                         none
  -mieee-fp                             [enabled]
  -mincoming-stack-boundary=            0
  -mindirect-branch=                    keep
  -minstrument-return=                  none
  -mintel-syntax                        -masm=intel
  -mlam=                                none
  -mlarge-data-threshold=<number>       65536
  -mlong-double-80                      [enabled]
  -mmemcpy-strategy=
  -mmemset-strategy=
  -mmmx                                 [enabled]
  -mmove-max=                           256
  -mmwait                               [enabled]
  -mpartial-vector-fp-math              [enabled]
  -mpclmul                              [enabled]
  -mpopcnt                              [enabled]
  -mprefer-avx128                       -mprefer-vector-width=128
  -mprefer-vector-width=                none
  -mpreferred-stack-boundary=           0
  -mpush-args                           [enabled]
  -mrdrnd                               [enabled]
  -mrecip=
  -mred-zone                            [enabled]
  -mregparm=                            6
  -msahf                                [enabled]
  -mscatter                             -mtune-ctrl=use_scatter
  -msse                                 [enabled]
  -msse2                                [enabled]
  -msse3                                [enabled]
  -msse4                                [enabled]
  -msse4.1                              [enabled]
  -msse4.2                              [enabled]
  -msse5                                -mavx
  -mssse3                               [enabled]
  -mstack-protector-guard-offset=
  -mstack-protector-guard-reg=
  -mstack-protector-guard-symbol=
  -mstack-protector-guard=              tls
  -mstore-max=                          256
  -mstringop-strategy=                  [default]
  -mstv                                 [enabled]
  -mtls-dialect=                        gnu
  -mtls-direct-seg-refs                 [enabled]
  -mtune-ctrl=
  -mtune=                               ivybridge
  -mveclibabi=                          [default]
  -mxsave                               [enabled]
  -mxsaveopt                            [enabled]

  Known assembler dialects (for use with the -masm= option):
    att intel

  Known ABIs (for use with the -mabi= option):
    ms sysv

  Known code models (for use with the -mcmodel= option):
    32 kernel large medium small

  Valid arguments to -mfpmath=:
    387 387+sse 387,sse both sse sse+387 sse,387

  Known choices for mitigation against straight line speculation with -mharden-sls=:
    all indirect-jmp none return

  Known indirect branch choices (for use with the -mindirect-branch=/-mfunction-return= options):
    keep thunk thunk-extern thunk-inline

  Known choices for return instrumentation with -minstrument-return=:
    call none nop5

  Known data alignment choices (for use with the -malign-data= option):
    abi cacheline compat

  Known vectorization library ABIs (for use with the -mveclibabi= option):
    acml svml

  Known address mode (for use with the -maddress-mode= option):
    long short

  Known preferred register vector length (to use with the -mprefer-vector-width= option):
    128 256 512 none

  Known stack protector guard (for use with the -mstack-protector-guard= option):
    global tls

  Valid arguments to -mstringop-strategy=:
    byte_loop libcall loop rep_4byte rep_8byte rep_byte unrolled_loop vector_loop

  Known TLS dialects (for use with the -mtls-dialect= option):
    gnu gnu2

  Known valid arguments for -march= option:
    i386 i486 i586 pentium lakemont pentium-mmx winchip-c6 winchip2 c3 samuel-2 c3-2 nehemiah c7 esther i686 pentiumpro pentium2 pentium3 pentium3m pentium-m pentium4 pentium4m prescott nocona core2 nehalem corei7 westmere sandybridge corei7-avx ivybridge core-avx-i haswell core-avx2 broadwell skylake skylake-avx512 cannonlake icelake-client rocketlake icelake-server cascadelake tigerlake cooperlake sapphirerapids emeraldrapids alderlake raptorlake meteorlake graniterapids graniterapids-d arrowlake arrowlake-s lunarlake pantherlake bonnell atom silvermont slm goldmont goldmont-plus tremont gracemont sierraforest grandridge clearwaterforest knl knm intel geode k6 k6-2 k6-3 athlon athlon-tbird athlon-4 athlon-xp athlon-mp x86-64 x86-64-v2 x86-64-v3 x86-64-v4 eden-x2 nano nano-1000 nano-2000 nano-3000 nano-x2 eden-x4 nano-x4 lujiazui yongfeng k8 k8-sse3 opteron opteron-sse3 athlon64 athlon64-sse3 athlon-fx amdfam10 barcelona bdver1 bdver2 bdver3 bdver4 znver1 znver2 znver3 znver4 znver5 btver1 btver2 generic native

  Known valid arguments for -mtune= option:
    generic i386 i486 pentium lakemont pentiumpro pentium4 nocona core2 nehalem sandybridge haswell bonnell silvermont goldmont goldmont-plus tremont sierraforest grandridge clearwaterforest knl knm skylake skylake-avx512 cannonlake icelake-client icelake-server cascadelake tigerlake cooperlake sapphirerapids alderlake rocketlake graniterapids graniterapids-d arrowlake arrowlake-s pantherlake intel lujiazui yongfeng geode k6 athlon k8 amdfam10 bdver1 bdver2 bdver3 bdver4 btver1 btver2 znver1 znver2 znver3 znver4 znver5