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

Bắt đầu bằng cách chạy python3 -mtest -v test_ctypes.test_find trong môi trường Linux được báo cáo và tập trung vào test_ctypes.test_find.FindLibraryLinux.test_find_library_with_gcc. Kiểm tra tại sao test này báo ok khi không có gcc, sau đó xác minh rằng kết quả của nó phản ánh chính xác tính khả dụng của trình biên dịch và test được tập trung vượt qua với hành vi như dự kiến.