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Several filesystem tests expect to be able to create symlinks even when !defined (_GLIBCXX_HAVE_SYMLINK), and fail predictably, reducing the amount of testing of other filesystem features. They are already skipped for mingw targets. I've extended the skipping to other targets in which _GLIBCXX_HAVE_SYMLINK is undefined, through a new NO_SYMLINKS macro in testsuite_fs.h that guards skippable portions of tests, and dg-require-target-fs-symlinks for tests that would be reduced to nothing. for libstdc++-v3/ChangeLog * testsuite/util/testsuite_fs.h (NO_SYMLINKS): Define on mingw and when create_symlink is a dummy. * testsuite/27_io/filesystem/operations/symlink_status.cc: Drop mingw xfail. (test01, test02): Don't create symlinks when NO_SYMLINKS is defined. * testsuite/27_io/filesystem/operations/canonical.cc (test03): Likewise. * testsuite/27_io/filesystem/operations/copy.cc (test02): Likewise. * testsuite/27_io/filesystem/operations/create_directories.cc (test04): Likewise. * testsuite/27_io/filesystem/operations/create_directory.cc (test01): Likewise. * testsuite/27_io/filesystem/operations/permissions.cc (test03, test04): Likewise. * testsuite/27_io/filesystem/operations/remove.cc (test01): Likewise. * testsuite/27_io/filesystem/operations/remove_all.cc (test01): Likewise. * testsuite/27_io/filesystem/operations/rename.cc (test_symlinks): Likewise. * testsuite/27_io/filesystem/operations/weakly_canonical.cc (test01): Likewise. * testsuite/experimental/filesystem/iterators/recursive_directory_iterator.cc (test06): Likewise. * testsuite/experimental/filesystem/operations/copy.cc (test01): Likewise. * testsuite/experimental/filesystem/operations/create_directories.cc (test04): Likewise. * testsuite/experimental/filesystem/operations/create_directory.cc (test01): Likewise. * testsuite/experimental/filesystem/operations/permissions.cc (test03, test04): Likewise. * testsuite/experimental/filesystem/operations/remove.cc (test01): Likewise. * testsuite/experimental/filesystem/operations/remove_all.cc (test01): Likewise. * testsuite/experimental/filesystem/operations/rename.cc (test01): Likewise. * testsuite/lib/libstdc++.exp (v3_check_preprocessor_condition): Add optional inc parameter. Add it to the test program after include bits/c++config.h. (check_v3_target_fs_symlinks): New. * testsuite/lib/dg-options.exp (dg-require-target-fs-symlinks): New. * testsuite/27_io/filesystem/operations/read_symlink.cc: Replace mingw xfail with require target-fs-symlinks. * testsuite/experimental/filesystem/operations/read_symlink.cc: Likewise.
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