python / python/mypy

`mypy` 1.7.1 build error on `ppc`: `FATAL: Section too large, can't encode r_address (0x109e874) into 24-bits of scattered relocation entry`

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bug topic-mypyc
Dominant language
Python
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Description

:info:build building '6c7190bc8b55ffe67f57__mypyc' extension
:info:build creating build/temp.macosx-10.6-ppc-cpython-311
:info:build creating build/temp.macosx-10.6-ppc-cpython-311/build
:info:build /opt/local/bin/gcc-mp-13 -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall -pipe -Os -arch ppc -isysroot/ -I/opt/local/var/macports/build/_opt_PPCSnowLeopardPorts_python_py-mypy/py311-mypy/work/mypy-1.7.1/mypyc/lib-rt -Ibuild -I/opt/local/Library/Frameworks/Python.framework/Versions/3.11/include/python3.11 -c build/__native_6c7190bc8b55ffe67f57.c -o build/temp.macosx-10.6-ppc-cpython-311/build/__native_6c7190bc8b55ffe67f57.o -O3 -g1 -Werror -Wno-unused-function -Wno-unused-label -Wno-unreachable-code -Wno-unused-variable -Wno-unused-command-line-argument -Wno-unknown-warning-option -Wno-unused-but-set-variable -Wno-ignored-optimization-argument -Wno-cpp
:info:build build/__native_6c7190bc8b55ffe67f57.c: In function 'CPyDef_fastparse___TypeConverter___visit_Subscript':
:info:build build/__native_6c7190bc8b55ffe67f57.c:566807: note: '-Wmisleading-indentation' is disabled from this point onwards, since column-tracking was disabled due to the size of the code/headers
:info:build 566807 |     if (!cpy_r_r39) goto CPyL40;
:info:build        | 
:info:build build/__native_6c7190bc8b55ffe67f57.c:566807: note: adding '-flarge-source-files' will allow for more column-tracking support, at the expense of compilation time and memory
:info:build {standard input}:unknown:FATAL:Section too large, can't encode r_address (0x109e874) into 24-bits of scattered relocation entry
:info:build error: command '/opt/local/bin/gcc-mp-13' failed with exit code 1
:info:build ERROR Backend subprocess exited when trying to invoke build_wheel
:info:build Command failed:  cd "/opt/local/var/macports/build/_opt_PPCSnowLeopardPorts_python_py-mypy/py311-mypy/work/mypy-1.7.1" && /opt/local/Library/Frameworks/Python.framework/Versions/3.11/bin/python3.11 -m build --no-isolation --wheel --outdir /opt/local/var/macports/build/_opt_PPCSnowLeopardPorts_python_py-mypy/py311-mypy/work 
:info:build Exit code: 1
:error:build Failed to build py311-mypy: command execution failed
:debug:build Error code: CHILDSTATUS 87236 1

Versions used:
Python 3.11.7 (main, Dec 19 2023, 18:10:15) [GCC 13.2.0] on darwin
py-mypy 1.7.1

Also: https://trac.macports.org/ticket/68943
May be related: https://github.com/python/mypy/issues/11507

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start with the mypy 1.7.1 wheel build command and the generated build/__native_6c7190bc8b55ffe67f57.c file shown in the report. Read the linked mypy issue #11507 and MacPorts ticket #68943, then reproduce the PPC build error; done means the py-mypy wheel builds successfully on PPC without the relocation failure.

Written by the indexing model from the issue text.

Assessment

Tech stack
c, python
Domain
build-system, operating-systems
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
25/100

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