Bug#1149451: gobject-introspection: FTBFS with setuptools >= 81: test_ccompiler.py failure

[Simon McVittie]

Control: retitle -1 gobject-introspection: FTBFS with setuptools >= 81: test_ccompiler.py failure
Control: forwarded -1 https://gitlab.gnome.org/GNOME/gobject-introspection/-/work_items/575
Control: tags -1 + upstream

On Tue, 29 Sep 2026 at 23:05:50 +0000, Santiago Vila wrote:
>27/69 gobject-introspection:test_ccompiler.py                       FAIL            0.21s   exit status 1

The actual failures are extensive, but include:

FileNotFoundError: [Errno 2] No such file or directory: 'supercc'
FileNotFoundError: [Errno 2] No such file or directory: 'clang'

This appears to be because the gobject-introspection test suite is 
patching setuptools to use a mock function instead of actually running 
the C compiler, but setuptools changes have meant that the mock function 
isn't called, so the test really tries to run a (nonexistent) custom C 
compiler.

     smcv