[gcc(refs/users/aoliva/heads/testme)] libstdc++: testsuite: skip fs space tests if not available

[Alexandre Oliva <aoliva@gcc.gnu.org>]

https://gcc.gnu.org/g:8ce9375d132860d06c856a8ec45107f19ccf90cc

commit 8ce9375d132860d06c856a8ec45107f19ccf90cc
Author: Alexandre Oliva <oliva@adacore.com>
Date:   Mon Jun 20 20:44:00 2022 -0300

    libstdc++: testsuite: skip fs space tests if not available
    
    The do_space function is defined in ways that are useful, or that fail
    immediately, depending on various macros.  When it fails immediately,
    the filesystem space.cc tests fail noisily, but the fail is entirely
    expected.
    
    Define HAVE_SPACE in the space.cc tests, according to the macros that
    select implementations of do_space, and use it to skip tests that are
    expected to fail.
    
    
    for  libstdc++-v3/ChangeLog
    
            * testsuite/27_io/filesystem/operations/space.cc: Skip the
            test if the feature is unavailable.
            * testsuite/experimental/filesystem/operations/space.cc:
            Likewise.
    
    TN: V527-033

Diff:
---
 libstdc++-v3/testsuite/27_io/filesystem/operations/space.cc    | 10 ++++++++++
 .../testsuite/experimental/filesystem/operations/space.cc      | 10 ++++++++++
 2 files changed, 20 insertions(+)

diff --git a/libstdc++-v3/testsuite/27_io/filesystem/operations/space.cc b/libstdc++-v3/testsuite/27_io/filesystem/operations/space.cc
index 05997cac1df..029d65655b1 100644
--- a/libstdc++-v3/testsuite/27_io/filesystem/operations/space.cc
+++ b/libstdc++-v3/testsuite/27_io/filesystem/operations/space.cc
@@ -24,6 +24,13 @@
 #include <testsuite_fs.h>
 #include <testsuite_hooks.h>
 
+#if defined (_GLIBCXX_HAVE_SYS_STATVFS_H) \
+  || defined (_GLIBCXX_FILESYSTEM_IS_WINDOWS)
+# define HAVE_SPACE 1
+#else
+# define HAVE_SPACE 0
+#endif
+
 bool check(std::filesystem::space_info const& s)
 {
   const std::uintmax_t err = -1;
@@ -59,6 +66,9 @@ test02()
 int
 main()
 {
+  if (!HAVE_SPACE)
+    return 0;
+
   test01();
   test02();
 }
diff --git a/libstdc++-v3/testsuite/experimental/filesystem/operations/space.cc b/libstdc++-v3/testsuite/experimental/filesystem/operations/space.cc
index 10ee0f06871..83868dea9b5 100644
--- a/libstdc++-v3/testsuite/experimental/filesystem/operations/space.cc
+++ b/libstdc++-v3/testsuite/experimental/filesystem/operations/space.cc
@@ -25,6 +25,13 @@
 #include <testsuite_fs.h>
 #include <testsuite_hooks.h>
 
+#if defined (_GLIBCXX_HAVE_SYS_STATVFS_H) \
+  || defined (_GLIBCXX_FILESYSTEM_IS_WINDOWS)
+# define HAVE_SPACE 1
+#else
+# define HAVE_SPACE 0
+#endif
+
 namespace fs = std::experimental::filesystem;
 
 bool check(fs::space_info const& s)
@@ -60,6 +67,9 @@ test02()
 int
 main()
 {
+  if (!HAVE_SPACE)
+    return 0;
+
   test01();
   test02();
 }