From 6c158aa448e084112b768fd9bc3306b64102d537 Mon Sep 17 00:00:00 2001
From: Vladimir Vishnevsky <vv.os.swe@gmail.com>
Date: Sat, 6 Feb 2021 12:25:24 +0100
Subject: [PATCH] libstdc++: Fix build failure for targets without unistd.h

The patch fixes build issues occuring if build parameter
"--enable-cstdio=stdio_pure" is specified and no unistd.h is
present in the environment.

2021-02-07 Vladimir Vishnevsky <vv.os.swe@gmail.com>

libstdc++-v3/ChangeLog:
        Fix build failure for targets without unistd.h.
        * include/ext/stdio_sync_filebuf.h: Unused <unistd.h> include removed.
        * src/c++17/fs_ops.cc: Namespace specified for mode_t.
---
 libstdc++-v3/include/ext/stdio_sync_filebuf.h | 1 -
 libstdc++-v3/src/c++17/fs_ops.cc              | 2 +-
 2 files changed, 1 insertion(+), 2 deletions(-)

diff --git a/libstdc++-v3/include/ext/stdio_sync_filebuf.h b/libstdc++-v3/include/ext/stdio_sync_filebuf.h
index 178b471957a..90765e55831 100644
--- a/libstdc++-v3/include/ext/stdio_sync_filebuf.h
+++ b/libstdc++-v3/include/ext/stdio_sync_filebuf.h
@@ -32,7 +32,6 @@
 #pragma GCC system_header
 
 #include <streambuf>
-#include <unistd.h>
 #include <cstdio>
 #include <bits/c++io.h>  // For __c_file
 #include <bits/move.h>   // For __exchange
diff --git a/libstdc++-v3/src/c++17/fs_ops.cc b/libstdc++-v3/src/c++17/fs_ops.cc
index 72755c98a5a..04a559ab1d6 100644
--- a/libstdc++-v3/src/c++17/fs_ops.cc
+++ b/libstdc++-v3/src/c++17/fs_ops.cc
@@ -1130,7 +1130,7 @@ fs::permissions(const path& p, perms prms, perm_options opts,
 #else
   if (nofollow && is_symlink(st))
     ec = std::make_error_code(std::errc::not_supported);
-  else if (posix::chmod(p.c_str(), static_cast<mode_t>(prms)))
+  else if (posix::chmod(p.c_str(), static_cast<posix::mode_t>(prms)))
     err = errno;
 #endif
 
-- 
2.17.1