Fix failing filesystem tests on mingw targets

	* config/abi/pre/gnu.ver (GLIBCXX_3.4.26): Add exports for fstream
	constructors and open members taking wide strings. Fix patterns for
	filesystem::path members to match wstring_view parameters. Add
	exports for shared_ptr members used by directory iterators.
	* src/c++17/fs_ops.cc (remove(const path&, error_code&)): Clear the
	error code parameter if the file doesn't exist.
	* src/filesystem/ops.cc (remove(const path&, error_code&)):
	Likewise.
	* testsuite/27_io/filesystem/operations/canonical.cc: Fix expected
	values for mingw targets, where "/" is not an absolute path. Do not
	test symlinks on mingw targets.
	* testsuite/experimental/filesystem/operations/canonical.cc: Likewise.
	* testsuite/27_io/filesystem/operations/copy.cc: Do not test symlinks
	on mingw targets.
	* testsuite/experimental/filesystem/operations/copy.cc: Likewise.
	* testsuite/27_io/filesystem/operations/create_directories.cc: Check
	that each component of the path is created.
	* testsuite/experimental/filesystem/operations/create_directories.cc:
	Likewise.
	* testsuite/27_io/filesystem/operations/exists.cc: Do not test
	permissions on mingw targets.
	* testsuite/experimental/filesystem/operations/exists.cc: Likewise.
	* testsuite/27_io/filesystem/operations/is_empty.cc: Likewise.
	* testsuite/experimental/filesystem/operations/is_empty.cc: Likewise.
	* testsuite/27_io/filesystem/operations/permissions.cc: XFAIL for
	mingw targets.
	* testsuite/experimental/filesystem/operations/permissions.cc:
	Likewise.
	* testsuite/27_io/filesystem/operations/remove.cc: Do not test
	symlinks or permissions on mingw targets.
	* testsuite/experimental/filesystem/operations/remove.cc: Likewise.
	* testsuite/27_io/filesystem/operations/remove_all.cc: Do not test
	symlinks on mingw targets.
	* testsuite/experimental/filesystem/operations/remove_all.cc:
	Likewise.
	* testsuite/27_io/filesystem/operations/status.cc: Do not test
	permissions on mingw targets.
	* testsuite/27_io/filesystem/operations/weakly_canonical.cc: Do not
	test symlinks on mingw targets.
	* testsuite/experimental/filesystem/operations/space.cc: Fix test
	for mingw targets.

From-SVN: r267991

9 files changed, 49 insertions, 9 deletions

diff --git a/libstdc++-v3/testsuite/experimental/filesystem/operations/canonical.cc b/libstdc++-v3/testsuite/experimental/filesystem/operations/canonical.cc
index 55572d61cef..7fad6c0317d 100644
--- a/libstdc++-v3/testsuite/experimental/filesystem/operations/canonical.cc
+++ b/libstdc++-v3/testsuite/experimental/filesystem/operations/canonical.cc
@@ -37,24 +37,26 @@ test01()
   canonical( p, ec );
   VERIFY( !ec );
 
+  const auto root = fs::absolute("/");
+
   p = "/";
   p = canonical( p, ec );
-  VERIFY( p == "/" );
+  VERIFY( p == root );
   VERIFY( !ec );
 
   p = "/.";
   p = canonical( p, ec );
-  VERIFY( p == "/" );
+  VERIFY( p == root );
   VERIFY( !ec );
 
   p = "/..";
   p = canonical( p, ec );
-  VERIFY( p == "/" );
+  VERIFY( p == root );
   VERIFY( !ec );
 
   p = "/../.././.";
   p = canonical( p, ec );
-  VERIFY( p == "/" );
+  VERIFY( p == root );
   VERIFY( !ec );
 }
 
diff --git a/libstdc++-v3/testsuite/experimental/filesystem/operations/copy.cc b/libstdc++-v3/testsuite/experimental/filesystem/operations/copy.cc
index d213398dd52..61028111fc3 100644
--- a/libstdc++-v3/testsuite/experimental/filesystem/operations/copy.cc
+++ b/libstdc++-v3/testsuite/experimental/filesystem/operations/copy.cc
@@ -67,6 +67,11 @@ test01()
 void
 test02()
 {
+#if defined(__MINGW32__) || defined(__MINGW64__)
+  // No symlink support
+  return;
+#endif
+
   auto from = __gnu_test::nonexistent_path();
   auto to = __gnu_test::nonexistent_path();
   std::error_code ec, bad = std::make_error_code(std::errc::invalid_argument);
diff --git a/libstdc++-v3/testsuite/experimental/filesystem/operations/create_directories.cc b/libstdc++-v3/testsuite/experimental/filesystem/operations/create_directories.cc
index 060c3188004..5b3e3783af5 100644
--- a/libstdc++-v3/testsuite/experimental/filesystem/operations/create_directories.cc
+++ b/libstdc++-v3/testsuite/experimental/filesystem/operations/create_directories.cc
@@ -63,6 +63,8 @@ test01()
   b = fs::create_directories( p/"./d4/../d5", ec );
   VERIFY( !ec );
   VERIFY( b );
+  VERIFY( is_directory(p/"d4") );
+  VERIFY( is_directory(p/"d5") );
   VERIFY( is_directory(p/"./d4/../d5") );
 
   std::uintmax_t count = remove_all(p, ec);
diff --git a/libstdc++-v3/testsuite/experimental/filesystem/operations/exists.cc b/libstdc++-v3/testsuite/experimental/filesystem/operations/exists.cc
index 36123f2422d..bb29b476015 100644
--- a/libstdc++-v3/testsuite/experimental/filesystem/operations/exists.cc
+++ b/libstdc++-v3/testsuite/experimental/filesystem/operations/exists.cc
@@ -74,6 +74,11 @@ test03()
 void
 test04()
 {
+#if defined(__MINGW32__) || defined(__MINGW64__)
+  // filesystem permissions not supported
+  return;
+#endif
+
   using perms = std::experimental::filesystem::perms;
   path p = __gnu_test::nonexistent_path();
   create_directory(p);
diff --git a/libstdc++-v3/testsuite/experimental/filesystem/operations/is_empty.cc b/libstdc++-v3/testsuite/experimental/filesystem/operations/is_empty.cc
index d3d929db1f9..1168ec78b4c 100644
--- a/libstdc++-v3/testsuite/experimental/filesystem/operations/is_empty.cc
+++ b/libstdc++-v3/testsuite/experimental/filesystem/operations/is_empty.cc
@@ -28,6 +28,11 @@ namespace fs = std::experimental::filesystem;
 void
 test01()
 {
+#if defined(__MINGW32__) || defined(__MINGW64__)
+  // filesystem permissions not supported
+  return;
+#endif
+
   auto p = __gnu_test::nonexistent_path();
   create_directory(p);
   permissions(p, fs::perms::none);
diff --git a/libstdc++-v3/testsuite/experimental/filesystem/operations/permissions.cc b/libstdc++-v3/testsuite/experimental/filesystem/operations/permissions.cc
index a771fd1005c..6d904b2bed7 100644
--- a/libstdc++-v3/testsuite/experimental/filesystem/operations/permissions.cc
+++ b/libstdc++-v3/testsuite/experimental/filesystem/operations/permissions.cc
@@ -18,6 +18,7 @@
 // { dg-options "-DUSE_FILESYSTEM_TS -lstdc++fs" }
 // { dg-do run { target c++11 } }
 // { dg-require-filesystem-ts "" }
+// { dg-xfail-if "permissions not supported" { *-*-mingw* } }
 
 // 15.26 Permissions [fs.op.permissions]
 
diff --git a/libstdc++-v3/testsuite/experimental/filesystem/operations/remove.cc b/libstdc++-v3/testsuite/experimental/filesystem/operations/remove.cc
index 606bf7c7781..36672074938 100644
--- a/libstdc++-v3/testsuite/experimental/filesystem/operations/remove.cc
+++ b/libstdc++-v3/testsuite/experimental/filesystem/operations/remove.cc
@@ -42,6 +42,10 @@ test01()
   VERIFY( !ec );
   VERIFY( !n );
 
+#if defined(__MINGW32__) || defined(__MINGW64__)
+  // No symlink support
+  return;
+#else
   auto link = __gnu_test::nonexistent_path();
   create_symlink(p, link);  // dangling symlink
   ec = bad_ec;
@@ -64,6 +68,7 @@ test01()
   VERIFY( !ec );
   VERIFY( n );
   VERIFY( !exists(symlink_status(p)) );
+#endif
 
   const auto dir = __gnu_test::nonexistent_path();
   create_directories(dir/"a/b");
@@ -73,6 +78,9 @@ test01()
   VERIFY( !n );
   VERIFY( exists(dir/"a/b") );
 
+#if defined(__MINGW32__) || defined(__MINGW64__)
+  // No permissions support
+#else
   permissions(dir, fs::perms::none, ec);
   if (!ec)
   {
@@ -82,6 +90,7 @@ test01()
     VERIFY( !n );
     permissions(dir, fs::perms::owner_all, ec);
   }
+#endif
 
   ec = bad_ec;
   n = remove(dir/"a/b", ec);
diff --git a/libstdc++-v3/testsuite/experimental/filesystem/operations/remove_all.cc b/libstdc++-v3/testsuite/experimental/filesystem/operations/remove_all.cc
index 33f02d416a8..99fb14a71d7 100644
--- a/libstdc++-v3/testsuite/experimental/filesystem/operations/remove_all.cc
+++ b/libstdc++-v3/testsuite/experimental/filesystem/operations/remove_all.cc
@@ -42,6 +42,9 @@ test01()
   VERIFY( !ec );
   VERIFY( n == 0 );
 
+#if defined(__MINGW32__) || defined(__MINGW64__)
+  // No symlink support
+#else
   auto link = __gnu_test::nonexistent_path();
   create_symlink(p, link);  // dangling symlink
   ec = bad_ec;
@@ -58,6 +61,7 @@ test01()
   VERIFY( n == 1 );
   VERIFY( !exists(symlink_status(link)) );  // The symlink is removed, but
   VERIFY( exists(p) );                      // its target is not.
+#endif
 
   const auto dir = __gnu_test::nonexistent_path();
   create_directories(dir/"a/b/c");
diff --git a/libstdc++-v3/testsuite/experimental/filesystem/operations/space.cc b/libstdc++-v3/testsuite/experimental/filesystem/operations/space.cc
index 38066edaae4..f68937e36f7 100644
--- a/libstdc++-v3/testsuite/experimental/filesystem/operations/space.cc
+++ b/libstdc++-v3/testsuite/experimental/filesystem/operations/space.cc
@@ -27,6 +27,12 @@
 
 namespace fs = std::experimental::filesystem;
 
+bool check(fs::space_info const& s)
+{
+  const std::uintmax_t err = -1;
+  return s.capacity != err || s.free != err || s.available != err;
+}
+
 void
 test01()
 {
@@ -36,17 +42,18 @@ test01()
   s = fs::space(root, ec);
   VERIFY( !ec );
 
-  s = fs::space(__gnu_test::nonexistent_path(), ec);
-  VERIFY( ec );
-  VERIFY( s.capacity ==  static_cast<uintmax_t>(-1) );
-  VERIFY( s.free ==  static_cast<uintmax_t>(-1) );
-  VERIFY( s.available ==  static_cast<uintmax_t>(-1) );
+  s = fs::space(__gnu_test::nonexistent_path()/".", ec);
+  if (ec)
+    VERIFY( ! check(s) );
+  else
+    VERIFY( check(s) );
 }
 
 void
 test02()
 {
   fs::space_info s = fs::space(".");
+  VERIFY( check(s) );
   VERIFY( s.capacity >= s.free );
 }