[New-bugs-announce] [issue44877] Python > 3.7 build fails with IBM XL compiler

[Quellyn Snead]

New submission from Quellyn Snead <quellyn at lanl.gov>:

Python 3.8 and above fails to build with the IBM XL compiler on Power9 platforms.

## System and Environment Information

```
$ arch
ppc64le
```

```
$ echo $CC
xlc -F/projects/opt/ppc64le/ibm/xlc-16.1.1.7/xlC/16.1.1/etc/xlc.cfg.rhel.7.8.gcc.8.3.0.cuda.10.1
```

```
$ xlc --version
IBM XL C/C++ for Linux, V16.1.1 (5725-C73, 5765-J13)
Version: 16.01.0001.0007
```

## Test Procedure
```
$ git clone git at github.com:quellyn/cpython.git
$ cd cpython
$ checkout 3.8

$ ./configure --with-pydebug
$ make -j2 | tee -a make.out
```

I tested for 3.7, 3.8, 3.9, 3.10, and master. In all cases the `make` failed for versions 3.8+. I've attached both the `config.log` and the make output logs for all. 

- Power9 architecture (ppc64le)
- IBM XL C/C++ 16.1.1.7

Python 3.7 builds without issue.

----------
components: Installation
files: cpython.tar.gz
messages: 399296
nosy: quellyn
priority: normal
severity: normal
status: open
title: Python > 3.7 build fails with IBM XL compiler
type: compile error
versions: Python 3.10, Python 3.11, Python 3.7, Python 3.8, Python 3.9
Added file: https://bugs.python.org/file50207/cpython.tar.gz

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue44877>
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