test_ctypes.test_find seems to pass when it shouldn't

Bug report

Bug description:

I have a container that has no compiler but does have ld:

$ gcc --version
-sh: gcc: command not found
$ ld --version
GNU ld (GNU Binutils) 2.46

If I run the test_ctypes tests, specifically test_find_library_with_gcc which looks like it will need gcc, it surprisingly passes:

$ python3 -mtest -v test_ctypes.test_find
== CPython 3.14.5 (main, May 10 2026, 10:21:34) [GCC 16.1.0]
== Linux-6.18.33-yocto-standard-aarch64-with-glibc2.43 little-endian
== Python build: release shared
== cwd: /tmp/test_python_worker_332æ
== CPU count: 4
== encodings: locale=ANSI_X3.4-1968 FS=utf-8
== resources: all test resources are disabled, use -u option to unskip tests

test_find (test.test_ctypes.test_find.FindLibraryAndroid.test_find) ... skipped 'Test only valid for Android'
test_find_nothing_with_wrong_ld_library_path (test.test_ctypes.test_find.FindLibraryEmscripten.test_find_nothing_with_wrong_ld_library_path) ... skipped 'Test only valid for Emscripten'
test_find_nothing_without_ld_library_path (test.test_ctypes.test_find.FindLibraryEmscripten.test_find_nothing_without_ld_library_path) ... skipped 'Test only valid for Emscripten'
test_find_wasm_file_with_so_extension (test.test_ctypes.test_find.FindLibraryEmscripten.test_find_wasm_file_with_so_extension) ... skipped 'Test only valid for Emscripten'
test_find_wasm_file_with_wasm_extension (test.test_ctypes.test_find.FindLibraryEmscripten.test_find_wasm_file_with_wasm_extension) ... skipped 'Test only valid for Emscripten'
test_ignore_non_wasm_file (test.test_ctypes.test_find.FindLibraryEmscripten.test_ignore_non_wasm_file) ... skipped 'Test only valid for Emscripten'
test_find_library_with_gcc (test.test_ctypes.test_find.FindLibraryLinux.test_find_library_with_gcc) ... ok
test_find_library_with_ld (test.test_ctypes.test_find.FindLibraryLinux.test_find_library_with_ld) ... ok
test_find_on_libpath (test.test_ctypes.test_find.FindLibraryLinux.test_find_on_libpath) ... skipped 'gcc, needed for test, not available'
test_gh114257 (test.test_ctypes.test_find.FindLibraryLinux.test_gh114257) ... ok
OpenGL libraries:
	 ('GL', None)
	 ('GLU', None)
	 ('gle', None)
test_gl (test.test_ctypes.test_find.Test_OpenGL_libs.test_gl) ... skipped 'lib_gl not available'
test_gle (test.test_ctypes.test_find.Test_OpenGL_libs.test_gle) ... skipped 'lib_gle not available'
test_glu (test.test_ctypes.test_find.Test_OpenGL_libs.test_glu) ... skipped 'lib_glu not available'
test_shell_injection (test.test_ctypes.test_find.Test_OpenGL_libs.test_shell_injection) ... ok

Specifically:

test_find_library_with_gcc (test.test_ctypes.test_find.FindLibraryLinux.test_find_library_with_gcc) ... ok

CPython versions tested on:

3.14

Operating systems tested on:

Linux

Linked PRs

• gh-151231

報告された Linux 環境でまず python3 -mtest -v test_ctypes.test_find を実行し、test_ctypes.test_find.FindLibraryLinux.test_find_library_with_gcc に焦点を当ててください。このテストが gcc なしで ok を報告する理由を確認し、その結果がコンパイラーの可用性を正しく反映していること、および対象のテストが意図した動作で成功することを検証してください。