[issue42591] Method Py_FrozenMain missing in libpython3.9

[Pablo Galindo Salgado]

Pablo Galindo Salgado  added the comment:


New changeset 68b9c20a98887bf0a92698f8df9f28b9440970dc by Miss Islington (bot) 
in branch '3.10':
bpo-43795: Remove Py_FrozenMain from the Limited API & Stable ABI  (GH-26241) 
(GH-26353)
https://github.com/python/cpython/commit/68b9c20a98887bf0a92698f8df9f28b9440970dc


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[issue42591] Method Py_FrozenMain missing in libpython3.9

[miss-islington]

Change by miss-islington :


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nosy_count: 3.0 -> 4.0
pull_requests: +24944
pull_request: https://github.com/python/cpython/pull/26353

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[issue42591] Method Py_FrozenMain missing in libpython3.9

[Petr Viktorin]

Change by Petr Viktorin :


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[issue42591] Method Py_FrozenMain missing in libpython3.9

[Petr Viktorin]

Petr Viktorin  added the comment:

Is this function actually usable in Windows? ISTM that you need to define three 
more functions, PyWinFreeze_ExeInit, PyWinFreeze_ExeTerm and 
PyInitFrozenExtensions.

Was adding this undocumented function to the Windows stable ABI deliberate? I 
see no discussion about that.

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[issue42591] Method Py_FrozenMain missing in libpython3.9

[Christian Bachmaier]

Christian Bachmaier  added the comment:

Vistor Stinner:
> If you can test it, I can backport the fix to stable branches.

Seems to work like a charm. Basically I used the same testing setup as 
previously on Dec 10th under Debian testing/bullseye without step 2, as master 
already contains your fix.

Victor, many thanks again, you are great!

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[issue42591] Method Py_FrozenMain missing in libpython3.9

[STINNER Victor]

STINNER Victor  added the comment:

Christian Bachmaier:
> The symlink does the trick. So it may be easy for you to fix that, so it does 
> operate out of the box again.

I pushed a fix in bpo-42613. It would be great if you could test it.

See my manual test: https://bugs.python.org/issue42613#msg383153

If you can test it, I can backport the fix to stable branches.

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[issue42591] Method Py_FrozenMain missing in libpython3.9

[Christian Bachmaier]

Christian Bachmaier  added the comment:

> Do you mean freeze.py from Tools/freeze/freeze.py?

Yes, unfortunately I have to keep a large old system running and there are only 
few options left. It is a University learning system, where students upload 
program code and then a huge amount of automtic quality checks are executed 
within a sandbox. The grading is done in a half automtic way. A real 
alternative is not existing, we tried hard to find one...

> This tool seems to 
> be broken for 4 years, since Python 3.6: bpo-42613.
> 4. freeze.py wants wants this for a very long time:
>ln -s /usr/local/lib/python3.10/config-3.10-x86_64-linux-gnu
>  /usr/local/lib/python3.10/config-3.10

The symlink does the trick. So it may be easy for you to fix that, so it does 
operate out of the box again.

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[issue42591] Method Py_FrozenMain missing in libpython3.9

[STINNER Victor]

STINNER Victor  added the comment:

Christian Bachmaier:
> Thus, when trying the provided freeze example via
> freeze.py hello.py & make

Do you mean freeze.py from Tools/freeze/freeze.py? This tool seems to be broken 
for 4 years, since Python 3.6: bpo-42613.

> 4. freeze.py wants wants this for a very long time:
>ln -s /usr/local/lib/python3.10/config-3.10-x86_64-linux-gnu
>  /usr/local/lib/python3.10/config-3.10

Oh, you fixed manually freeze.py?

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[issue42591] Method Py_FrozenMain missing in libpython3.9

[STINNER Victor]

Change by STINNER Victor :


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resolution:  -> fixed
stage: patch review -> resolved
status: open -> closed
versions: +Python 3.10

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[issue42591] Method Py_FrozenMain missing in libpython3.9

[STINNER Victor]

STINNER Victor  added the comment:

Thanks Christian Bachmaier for the bug report, it's now fixed.

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[issue42591] Method Py_FrozenMain missing in libpython3.9

[STINNER Victor]

STINNER Victor  added the comment:


New changeset 6b2ed385094839c1920b934f07d946bf049a3770 by Victor Stinner in 
branch '3.9':
bpo-42591: Export missing Py_FrozenMain() symbol (GH-23730) (GH-23734)
https://github.com/python/cpython/commit/6b2ed385094839c1920b934f07d946bf049a3770


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[issue42591] Method Py_FrozenMain missing in libpython3.9

[STINNER Victor]

Change by STINNER Victor :


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[issue42591] Method Py_FrozenMain missing in libpython3.9

[STINNER Victor]

STINNER Victor  added the comment:

> a simple test with the tools/freeze/hello.py example was successfull with 
> your patch and the newest cpython from github.

Oh great, thanks for your quick feedback! I applied your PR to master and I 
will backport it to 3.9.

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[issue42591] Method Py_FrozenMain missing in libpython3.9

[STINNER Victor]

STINNER Victor  added the comment:


New changeset b5c7b38f5ebbc84b5b80192db1743d3e1cdcf4c5 by Victor Stinner in 
branch 'master':
bpo-42591: Export missing Py_FrozenMain() symbol (GH-23730)
https://github.com/python/cpython/commit/b5c7b38f5ebbc84b5b80192db1743d3e1cdcf4c5


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[issue42591] Method Py_FrozenMain missing in libpython3.9

[Christian Bachmaier]

Christian Bachmaier  added the comment:

Dear Victor,

a simple test with the tools/freeze/hello.py example was successfull with your 
patch and the newest cpython from github.

1. git clone https://github.com/python/cpython.git
2. Applied a patch of your pull request
3. configure, make, amke install to xxx
4. freeze.py wants wants this for a very long time:
   ln -s /usr/local/lib/python3.10/config-3.10-x86_64-linux-gnu
 /usr/local/lib/python3.10/config-3.10
5. python3 cpython/Tools/freeze.py -o frozen hello.py
6. cd frozen; make; ./hello
   Helo world...

Thanks again,
Chris

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[issue42591] Method Py_FrozenMain missing in libpython3.9

[STINNER Victor]

STINNER Victor  added the comment:

I wrote PR 23730 to fix the issue. Would it be possible for you to test it?

Since Python 3.9, symbols which are not explicitly exported are no longer 
exported. Python now uses -fvisibility=hidden.

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[issue42591] Method Py_FrozenMain missing in libpython3.9

[STINNER Victor]

Change by STINNER Victor :


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nosy: +vstinner
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stage:  -> patch review
pull_request: https://github.com/python/cpython/pull/23730

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[issue42591] Method Py_FrozenMain missing in libpython3.9

[Christian Bachmaier]

Christian Bachmaier  added the comment:

The file containing the source code is Python/frozenmain.c .

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[issue42591] Method Py_FrozenMain missing in libpython3.9

[Christian Bachmaier]

Christian Bachmaier  added the comment:

The same under Python 3.9.1 (Package from Debian bullseye/testing). As the 
method Py_FrozenMain is contained in the source code, maybe ist has something 
to do with the build process, a change in makefile? As far as I can see, the 
builder of the distribution packages call the makefile as provided.

Chris

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[issue42591] Method Py_FrozenMain missing in libpython3.9

[Christian Bachmaier]

Change by Christian Bachmaier :


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components: +Library (Lib) -C API

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[issue42591] Method Py_FrozenMain missing in libpython3.9

[Christian Bachmaier]

New submission from Christian Bachmaier :

In Python 3.9.0 and 3.9.1rc1 (Packages from Ubuntu Devel Branch or Fedora) the 
Method
int Py_FrozenMain(int, char**)
is missing in libpython3.9.so

Thus, when trying the provided freeze example via
freeze.py hello.py & make
one gets the linker error
/usr/bin/ld: frozen.o: in function `main': frozen/frozen.c:681: undefined 
reference to `Py_FrozenMain' .

In previous Python 3.8.x the bug does not show.

Thanks,
Chris

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components: C API
messages: 382651
nosy: chba
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title: Method Py_FrozenMain missing in libpython3.9
versions: Python 3.9

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