[glib: 1/2] glocalfileinfo: Fix use of fstatat() on macOS < 10.10

[Sebastian Dröge <sdroege src gnome org>]

commit 74756a87fa409be2a67577640a0ab0ca768dc519
Author: Philip Withnall <pwithnall endlessos org>
Date:   Tue Oct 6 10:25:02 2020 +0100

    glocalfileinfo: Fix use of fstatat() on macOS < 10.10
    
    `g_local_file_fstatat()` needs to fall back to returning an error if
    `fstatat()` isn’t defined, which is the case on older versions of macOS
    (as well as Windows, which was already handled). Callers shouldn’t call
    `g_local_file_fstatat()` in these cases. (That’s already the case.)
    
    Signed-off-by: Philip Withnall <pwithnall endlessos org>
    
    Fixes: #2203

 gio/glocalfileinfo.h | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)
---
diff --git a/gio/glocalfileinfo.h b/gio/glocalfileinfo.h
index f2beb70cd..ff3e4994f 100644
--- a/gio/glocalfileinfo.h
+++ b/gio/glocalfileinfo.h
@@ -236,12 +236,12 @@ g_local_file_fstatat (int                  fd,
       return -1;
     }
 
-#ifdef G_OS_WIN32
-  /* Currently not supported on Windows */
+#if !defined(G_OS_WIN32) && defined(AT_FDCWD)
+  return fstatat (fd, path, stat_buf, flags);
+#else
+  /* Currently not supported on Windows or macOS < 10.10 */
   errno = ENOSYS;
   return -1;
-#else
-  return fstatat (fd, path, stat_buf, flags);
 #endif
 }