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Many tests do `for (const path& p : test_paths)` where test_paths is an array of strings. To avoid -Wrange-loop-construct warnings the loop variable should be an object, not a reference bound to a temporary. libstdc++-v3/ChangeLog: * testsuite/27_io/filesystem/operations/absolute.cc: Avoid -Wrange-loop-construct warning. * testsuite/27_io/filesystem/path/append/source.cc: Likewise. * testsuite/27_io/filesystem/path/assign/copy.cc: Likewise. * testsuite/27_io/filesystem/path/compare/path.cc: Likewise. * testsuite/27_io/filesystem/path/construct/copy.cc: Likewise. * testsuite/27_io/filesystem/path/decompose/extension.cc: Likewise. * testsuite/27_io/filesystem/path/decompose/filename.cc: Likewise. * testsuite/27_io/filesystem/path/decompose/parent_path.cc: Likewise. * testsuite/27_io/filesystem/path/decompose/relative_path.cc: Likewise. * testsuite/27_io/filesystem/path/decompose/root_directory.cc: Likewise. * testsuite/27_io/filesystem/path/decompose/root_path.cc: Likewise. * testsuite/27_io/filesystem/path/itr/traversal.cc: Likewise. * testsuite/27_io/filesystem/path/modifiers/remove_filename.cc: Likewise. * testsuite/27_io/filesystem/path/modifiers/replace_extension.cc: Likewise. * testsuite/27_io/filesystem/path/modifiers/replace_filename.cc: Likewise. * testsuite/27_io/filesystem/path/nonmember/append.cc: Likewise. * testsuite/27_io/filesystem/path/nonmember/cmp.cc: Likewise. * testsuite/27_io/filesystem/path/nonmember/cmp_c++20.cc: Likewise. * testsuite/27_io/filesystem/path/nonmember/hash_value.cc: Likewise. * testsuite/27_io/filesystem/path/query/has_extension.cc: Likewise. * testsuite/27_io/filesystem/path/query/has_filename.cc: Likewise. * testsuite/27_io/filesystem/path/query/has_parent_path.cc: Likewise. * testsuite/27_io/filesystem/path/query/has_relative_path.cc: Likewise. * testsuite/27_io/filesystem/path/query/has_root_directory.cc: Likewise. * testsuite/27_io/filesystem/path/query/has_root_name.cc: Likewise. * testsuite/27_io/filesystem/path/query/has_root_path.cc: Likewise. * testsuite/27_io/filesystem/path/query/has_stem.cc: Likewise. * testsuite/27_io/filesystem/path/query/is_relative.cc: Likewise. * testsuite/experimental/filesystem/operations/absolute.cc: Likewise. * testsuite/experimental/filesystem/path/assign/copy.cc: Likewise. * testsuite/experimental/filesystem/path/compare/path.cc: Likewise. * testsuite/experimental/filesystem/path/construct/copy.cc: Likewise. * testsuite/experimental/filesystem/path/decompose/extension.cc: Likewise. * testsuite/experimental/filesystem/path/decompose/filename.cc: Likewise. * testsuite/experimental/filesystem/path/decompose/parent_path.cc: Likewise. * testsuite/experimental/filesystem/path/decompose/relative_path.cc: Likewise. * testsuite/experimental/filesystem/path/decompose/root_directory.cc: Likewise. * testsuite/experimental/filesystem/path/decompose/root_path.cc: Likewise. * testsuite/experimental/filesystem/path/itr/traversal.cc: Likewise. * testsuite/experimental/filesystem/path/modifiers/remove_filename.cc: Likewise. * testsuite/experimental/filesystem/path/modifiers/replace_extension.cc: Likewise. * testsuite/experimental/filesystem/path/modifiers/replace_filename.cc: Likewise. * testsuite/experimental/filesystem/path/nonmember/hash_value.cc: Likewise. * testsuite/experimental/filesystem/path/query/has_extension.cc: Likewise. * testsuite/experimental/filesystem/path/query/has_filename.cc: Likewise. * testsuite/experimental/filesystem/path/query/has_parent_path.cc: Likewise. * testsuite/experimental/filesystem/path/query/has_relative_path.cc: Likewise. * testsuite/experimental/filesystem/path/query/has_root_directory.cc: Likewise. * testsuite/experimental/filesystem/path/query/has_root_name.cc: Likewise. * testsuite/experimental/filesystem/path/query/has_root_path.cc: Likewise. * testsuite/experimental/filesystem/path/query/has_stem.cc: Likewise. * testsuite/experimental/filesystem/path/query/is_relative.cc: Likewise.
file: libstdc++-v3/README New users may wish to point their web browsers to the file index.html in the 'doc/html' subdirectory. It contains brief building instructions and notes on how to configure the library in interesting ways.