2025-12-07 09:16:39 +08:00
14 changed files with 358 additions and 578 deletions
--- a/.cirrus.yml
+++ b/.cirrus.yml
@ -1,6 +1,6 @@
 freebsd_task:
  freebsd_instance:
-    image_family: freebsd-14-0
+    image_family: freebsd-12-1
  install_script: |
    pkg install -y cmake
    pw groupadd testgrp
@ -11,24 +11,25 @@ freebsd_task:
  test_script: |
    sudo -u testuser .ci/unix-test.sh

-rockylinux8_task:
+centos7_task:
  container:
-    image: docker.io/rockylinux:8
+    image: centos:7
  install_script: |
-    dnf group install -y "Development Tools"
-    dnf install cmake -y
+    yum install -y centos-release-scl
+    yum install -y devtoolset-9
+    curl -L https://github.com/Kitware/CMake/releases/download/v3.16.4/cmake-3.16.4-Linux-x86_64.tar.gz | tar xzvf - -C /usr/local --strip-components 1
  build_script: |
-    .ci/unix-build.sh
+    source /opt/rh/devtoolset-9/enable && PATH=$PATH:/usr/local/bin .ci/unix-build.sh
  test_script: |
-    .ci/unix-test.sh
+    PATH=$PATH:/usr/local/bin .ci/unix-test.sh

-rockylinux9_task:
+centos8_task:
  container:
-    image: docker.io/rockylinux:9
+    image: quay.io/centos/centos:stream8
  install_script: |
-    dnf group install -y "Development Tools"
-    dnf install cmake -y
+    yum group install -y "Development Tools"
+    curl -L https://github.com/Kitware/CMake/releases/download/v3.16.4/cmake-3.16.4-Linux-x86_64.tar.gz | tar xzvf - -C /usr/local --strip-components 1
  build_script: |
-    .ci/unix-build.sh
+    PATH=$PATH:/usr/local/bin .ci/unix-build.sh
  test_script: |
-    .ci/unix-test.sh
+    PATH=$PATH:/usr/local/bin .ci/unix-test.sh
--- a/.drone.yml-disabled
+++ b/.drone.yml-disabled
--- a/.github/workflows/build_cmake.yml
+++ b/.github/workflows/build_cmake.yml
@ -10,42 +10,6 @@ jobs:
      fail-fast: false
      matrix:
        config:
-          - name: "Ubuntu 22.04 GCC 11"
-            os: ubuntu-22.04
-            build_type: Release
-            packages: ninja-build
-            generator: Ninja
-            compatibility: "cxx_std_11;cxx_std_17;cxx_std_20"
-            cc: gcc
-            cxx: g++
-
-          - name: "Ubuntu 22.04 Clang 13.0"
-            os: ubuntu-22.04
-            build_type: Release
-            packages: ninja-build libc++-13-dev libc++abi-13-dev
-            generator: Ninja
-            compatibility: "cxx_std_11;cxx_std_17;cxx_std_20"
-            cc: clang-13
-            cxx: clang++-13
-
-          - name: "Ubuntu 22.04 Clang 15.0"
-            os: ubuntu-22.04
-            build_type: Release
-            packages: ninja-build libc++-15-dev libc++abi-15-dev
-            generator: Ninja
-            compatibility: "cxx_std_11;cxx_std_17;cxx_std_20"
-            cc: clang-15
-            cxx: clang++-15
-
-          - name: "Ubuntu 22.04 GCC 11 coverage"
-            os: ubuntu-22.04
-            build_type: Debug
-            packages: ninja-build lcov
-            generator: Ninja
-            compatibility: "cxx_std_11;cxx_std_17;cxx_std_20"
-            cc: gcc
-            cxx: g++
-
          - name: "Ubuntu 20.04 GCC 9.3"
            os: ubuntu-20.04
            build_type: Release
@ -82,6 +46,69 @@ jobs:
            cc: gcc
            cxx: g++

+          - name: "Ubuntu 18.04 GCC 8.4"
+            os: ubuntu-18.04
+            build_type: Release
+            packages: ninja-build gcc-8 g++-8
+            generator: Ninja
+            compatibility: "cxx_std_11;cxx_std_17"
+            cc: gcc-8
+            cxx: g++-8
+
+          - name: "Ubuntu 18.04 GCC 7.5"
+            os: ubuntu-18.04
+            build_type: Release
+            packages: ninja-build
+            generator: Ninja
+            compatibility: "cxx_std_11;cxx_std_17"
+            cc: gcc-7
+            cxx: g++-7
+
+          - name: "Ubuntu 18.04 GCC 6.5"
+            os: ubuntu-18.04
+            build_type: Release
+            packages: ninja-build gcc-6 g++-6
+            generator: Ninja
+            compatibility: "cxx_std_11;cxx_std_17"
+            cc: gcc-6
+            cxx: g++-6
+
+          - name: "Ubuntu 18.04 GCC 5.5"
+            os: ubuntu-18.04
+            build_type: Release
+            packages: ninja-build gcc-5 g++-5
+            generator: Ninja
+            compatibility: "cxx_std_11;cxx_std_17"
+            cc: gcc-5
+            cxx: g++-5
+
+          - name: "Ubuntu 18.04 Clang 9.0"
+            os: ubuntu-18.04
+            build_type: Release
+            packages: ninja-build libc++-9-dev libc++abi-9-dev
+            generator: Ninja
+            compatibility: "cxx_std_11;cxx_std_17;cxx_std_20"
+            cc: clang
+            cxx: clang++
+
+          - name: "Ubuntu 18.04 Clang 6.0"
+            os: ubuntu-18.04
+            build_type: Release
+            packages: ninja-build clang-6.0
+            generator: Ninja
+            compatibility: "cxx_std_11;cxx_std_17"
+            cc: clang-6.0
+            cxx: clang++-6.0
+
+          - name: "Ubuntu 18.04 Clang 5.0"
+            os: ubuntu-18.04
+            build_type: Release
+            packages: ninja-build clang-5.0
+            generator: Ninja
+            compatibility: "cxx_std_11;cxx_std_17"
+            cc: clang-5.0
+            cxx: clang++-5.0
+
          - name: "Windows MSVC 2019"
            os: windows-2019
            build_type: Release
@ -91,12 +118,21 @@ jobs:
            cc: cl
            cxx: cl

-          - name: "macOS 13 AppleClang"
-            os: macos-13
+          - name: "macOS 10.15 AppleClang"
+            os: macos-10.15
            build_type: Release
            packages: ninja
            generator: Ninja
-            compatibility: "cxx_std_11;cxx_std_17;cxx_std_20"
+            compatibility: "cxx_std_11;cxx_std_17"
+            cc: clang
+            cxx: clang++
+
+          - name: "macOS 11.6 AppleClang"
+            os: macos-11
+            build_type: Release
+            packages: ninja
+            generator: Ninja
+            compatibility: "cxx_std_11;cxx_std_17"
            cc: clang
            cxx: clang++

--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@ -1,8 +1,5 @@
 cmake_minimum_required(VERSION 3.7.2)
-project(
-   ghcfilesystem,
-   VERSION 1.5.15
-)
+project(ghcfilesystem)

 if (POLICY CMP0077)
    cmake_policy(SET CMP0077 NEW)
@ -18,7 +15,7 @@ if(CMAKE_SOURCE_DIR STREQUAL PROJECT_SOURCE_DIR)
 else()
    option(GHC_FILESYSTEM_BUILD_EXAMPLES "Build examples" OFF)
    option(GHC_FILESYSTEM_BUILD_TESTING "Enable tests" OFF)
-    option(GHC_FILESYSTEM_WITH_INSTALL "With install target" OFF)
+    option(GHC_FILESYSTEM_WITH_INSTALL "With install target" ON)
 endif()
 option(GHC_FILESYSTEM_BUILD_STD_TESTING "Enable STD tests" ${GHC_FILESYSTEM_BUILD_TESTING})
 if(NOT DEFINED GHC_FILESYSTEM_TEST_COMPILE_FEATURES)
@ -35,14 +32,11 @@ endif()
 if(CMAKE_CXX_STANDARD LESS 11)
    message(FATAL_ERROR "CMAKE_CXX_STANDARD is less than 11, ghc::filesystem only works with C++11 and above.")
 endif()
-if(CMAKE_SOURCE_DIR STREQUAL PROJECT_SOURCE_DIR)
-    message(STATUS "System name: ${CMAKE_SYSTEM_NAME}")
-    message(STATUS "Compiler ID: ${CMAKE_CXX_COMPILER_ID}")
-    message(STATUS "CMAKE_CXX_COMPILE_FEATURES: ${CMAKE_CXX_COMPILE_FEATURES}")
-endif()
+message(STATUS "System name: ${CMAKE_SYSTEM_NAME}")
+message(STATUS "Compiler ID: ${CMAKE_CXX_COMPILER_ID}")
+message(STATUS "CMAKE_CXX_COMPILE_FEATURES: ${CMAKE_CXX_COMPILE_FEATURES}")

 add_library(ghc_filesystem INTERFACE)
-add_library(ghcFilesystem::ghc_filesystem ALIAS ghc_filesystem)
 target_include_directories(ghc_filesystem INTERFACE
    $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
    $<INSTALL_INTERFACE:include>)
@ -76,15 +70,7 @@ if(GHC_FILESYSTEM_WITH_INSTALL)
        "${PROJECT_BINARY_DIR}/cmake/ghc_filesystem-config.cmake"
        INSTALL_DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake/ghc_filesystem"
        PATH_VARS CMAKE_INSTALL_INCLUDEDIR)
-    write_basic_package_version_file(
-        "${PROJECT_BINARY_DIR}/cmake/ghc_filesystem-config-version.cmake"
-        VERSION ${PROJECT_VERSION}
-        COMPATIBILITY SameMinorVersion
-    )
-    install(
-        FILES
-            "${PROJECT_BINARY_DIR}/cmake/ghc_filesystem-config.cmake"
-            "${PROJECT_BINARY_DIR}/cmake/ghc_filesystem-config-version.cmake"
-        DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake/ghc_filesystem"
-    )
+    install(FILES "${PROJECT_BINARY_DIR}/cmake/ghc_filesystem-config.cmake"
+        DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake/ghc_filesystem")
+    add_library(ghcFilesystem::ghc_filesystem ALIAS ghc_filesystem)
 endif()
--- a/README.md
+++ b/README.md
@ -3,40 +3,37 @@
 [![CMake Build Matrix](https://github.com/gulrak/filesystem/actions/workflows/build_cmake.yml/badge.svg?branch=master)](https://github.com/gulrak/filesystem/actions/workflows/build_cmake.yml)
 [![Build Status](https://ci.appveyor.com/api/projects/status/t07wp3k2cddo0hpo/branch/master?svg=true)](https://ci.appveyor.com/project/gulrak/filesystem)
 [![Build Status](https://api.cirrus-ci.com/github/gulrak/filesystem.svg?branch=master)](https://cirrus-ci.com/github/gulrak/filesystem)
+[![Build Status](https://cloud.drone.io/api/badges/gulrak/filesystem/status.svg?ref=refs/heads/master)](https://cloud.drone.io/gulrak/filesystem)
 [![Coverage Status](https://coveralls.io/repos/github/gulrak/filesystem/badge.svg?branch=master)](https://coveralls.io/github/gulrak/filesystem?branch=master)
-[![Latest Release Tag](https://img.shields.io/github/tag/gulrak/filesystem.svg)](https://github.com/gulrak/filesystem/tree/v1.5.14)
-<!-- [![Build Status](https://cloud.drone.io/api/badges/gulrak/filesystem/status.svg?ref=refs/heads/master)](https://cloud.drone.io/gulrak/filesystem) -->
-
-
-<!-- TOC -->
-* [Filesystem](#filesystem)
-  * [Motivation](#motivation)
-  * [Why the namespace GHC?](#why-the-namespace-ghc)
-  * [Platforms](#platforms)
-  * [Tests](#tests)
-  * [Usage](#usage)
-    * [Downloads](#downloads)
-    * [Using it as Single-File-Header](#using-it-as-single-file-header)
-    * [Using it as Forwarding-/Implementation-Header](#using-it-as-forwarding-implementation-header)
-    * [Git Submodule and CMake](#git-submodule-and-cmake)
-    * [Versioning](#versioning)
-  * [Documentation](#documentation)
-    * [`ghc::filesystem::ifstream`, `ghc::filesystem::ofstream`, `ghc::filesystem::fstream`](#ghcfilesystemifstream--ghcfilesystemofstream--ghcfilesystemfstream)
-    * [`ghc::filesystem::u8arguments`](#ghcfilesystemu8arguments)
-  * [Differences](#differences)
-    * [LWG Defects](#lwg-defects)
-    * [Not Implemented on C++ before C++17](#not-implemented-on-c-before-c17)
-    * [Differences in API](#differences-in-api)
-      * [Differences of Specific Interfaces](#differences-of-specific-interfaces)
-    * [Differences in Behavior](#differences-in-behavior)
-      * [fs.path (ref)](#fspath--ref-)
-  * [Open Issues](#open-issues)
-    * [Windows](#windows)
-      * [Symbolic Links on Windows](#symbolic-links-on-windows)
-      * [Permissions](#permissions)
-  * [Release Notes](#release-notes)
-<!-- TOC -->
+[![Latest Release Tag](https://img.shields.io/github/tag/gulrak/filesystem.svg)](https://github.com/gulrak/filesystem/tree/v1.5.12)

+- [Filesystem](#filesystem)
+  - [Motivation](#motivation)
+  - [Why the namespace GHC?](#why-the-namespace-ghc)
+  - [Platforms](#platforms)
+  - [Tests](#tests)
+  - [Usage](#usage)
+    - [Downloads](#downloads)
+    - [Using it as Single-File-Header](#using-it-as-single-file-header)
+    - [Using it as Forwarding-/Implementation-Header](#using-it-as-forwarding-implementation-header)
+    - [Git Submodule and CMake](#git-submodule-and-cmake)
+    - [Versioning](#versioning)
+  - [Documentation](#documentation)
+    - [`ghc::filesystem::ifstream`, `ghc::filesystem::ofstream`, `ghc::filesystem::fstream`](#ghcfilesystemifstream-ghcfilesystemofstream-ghcfilesystemfstream)
+    - [`ghc::filesystem::u8arguments`](#ghcfilesystemu8arguments)
+  - [Differences](#differences)
+    - [LWG Defects](#lwg-defects)
+    - [Not Implemented on C++ before C++17](#not-implemented-on-c-before-c17)
+    - [Differences in API](#differences-in-api)
+      - [Differences of Specific Interfaces](#differences-of-specific-interfaces)
+    - [Differences in Behavior](#differences-in-behavior)
+      - [fs.path](#fspath-refhttpsencppreferencecomwcppfilesystempath)
+  - [Open Issues](#open-issues)
+    - [Windows](#windows)
+      - [Symbolic Links on Windows](#symbolic-links-on-windows)
+      - [Permissions](#permissions)
+  - [Release Notes](#release-notes)
+  
 # Filesystem

 This is a header-only single-file `std::filesystem` compatible helper library,
@ -46,9 +43,8 @@ macOS 10.12/10.14/10.15/11.6, Windows 10, Ubuntu 18.04, Ubuntu 20.04, CentOS 7,
 Alpine ARM/ARM64 Linux and Solaris 10 but should work on other systems too, as long as you have
 at least a C++11 compatible compiler. It should work with Android NDK, Emscripten and I even
 had reports of it being used on iOS (within sandboxing constraints) and with v1.5.6 there
-is experimental support for QNX. The support of Android NDK, Emscripten, QNX, and since 1.5.14
-GNU/Hurd and Haiku is not backed up by automated testing but PRs and bug reports are welcome
-for those too and they are reported to work.
+is experimental support for QNX. The support of Android NDK, Emscripten and QNX is not
+backed up by automated testing but PRs and bug reports are welcome for those too.
 It is of course in its own namespace `ghc::filesystem` to not interfere with a regular `std::filesystem`
 should you use it in a mixed C++17 environment (which is possible).

@ -111,8 +107,7 @@ Unit tests are currently run with:
 * macOS 10.12: Xcode 9.2 (clang-900.0.39.2), GCC 9.2, Clang 9.0, macOS 10.13: Xcode 10.1, macOS 10.14: Xcode 11.2, macOS 10.15: Xcode 11.6, Xcode 12.4
 * Windows: Visual Studio 2017, Visual Studio 2015, Visual Studio 2019, MinGW GCC 6.3 (Win32), GCC 7.2 (Win64), Cygwin GCC 10.2 (no CI yet)
 * Linux (Ubuntu): GCC (5.5, 6.5, 7.4, 8.3, 9.2), Clang (5.0, 6.0, 7.1, 8.0, 9.0)
-* ~~Linux (Alpine ARM/ARM64): GCC 9.2.0~~ (The Drone build scripts stopped working,
-  as they where a contribution, I couldn't figure out what went wrong, any help appreciated.)
+* Linux (Alpine ARM/ARM64): GCC 9.2.0
 * FreeBSD: Clang 8.0
 * Solaris: GCC 5.5 

@ -154,8 +149,8 @@ in the standard, and there might be issues in these implementations too.

 ### Downloads

-The latest release version is [v1.5.14](https://github.com/gulrak/filesystem/tree/v1.5.14) and
-source archives can be found [here](https://github.com/gulrak/filesystem/releases/tag/v1.5.14).
+The latest release version is [v1.5.12](https://github.com/gulrak/filesystem/tree/v1.5.12) and
+source archives can be found [here](https://github.com/gulrak/filesystem/releases/tag/v1.5.12).

 The latest pre-native-backend version is [v1.4.0](https://github.com/gulrak/filesystem/tree/v1.4.0) and
 source archives can be found [here](https://github.com/gulrak/filesystem/releases/tag/v1.4.0).
@ -176,83 +171,60 @@ Everything is in the namespace `ghc::filesystem`, so one way to use it only as
 a fallback could be:

 ```cpp
-#if _MSVC_LANG >= 201703L || __cplusplus >= 201703L && defined(__has_include)
-    // ^ Supports MSVC prior to 15.7 without setting /Zc:__cplusplus to fix __cplusplus
-    // _MSVC_LANG works regardless. But without the switch, the compiler always reported 199711L: https://blogs.msdn.microsoft.com/vcblog/2018/04/09/msvc-now-correctly-reports-__cplusplus/
-    #if __has_include(<filesystem>) // Two stage __has_include needed for MSVC 2015 and per https://gcc.gnu.org/onlinedocs/cpp/_005f_005fhas_005finclude.html
-        #define GHC_USE_STD_FS
-
-        // Old Apple OSs don't support std::filesystem, though the header is available at compile
-        // time. In particular, std::filesystem is unavailable before macOS 10.15, iOS/tvOS 13.0,
-        // and watchOS 6.0.
-        #ifdef __APPLE__
-            #include <Availability.h>
-            // Note: This intentionally uses std::filesystem on any new Apple OS, like visionOS
-            // released after std::filesystem, where std::filesystem is always available.
-            // (All other __<platform>_VERSION_MIN_REQUIREDs will be undefined and thus 0.)
-            #if __MAC_OS_X_VERSION_MIN_REQUIRED && __MAC_OS_X_VERSION_MIN_REQUIRED < 101500 \
-             || __IPHONE_OS_VERSION_MIN_REQUIRED && __IPHONE_OS_VERSION_MIN_REQUIRED < 130000 \
-             || __TV_OS_VERSION_MIN_REQUIRED && __TV_OS_VERSION_MIN_REQUIRED < 130000 \
-             || __WATCH_OS_VERSION_MAX_ALLOWED && __WATCH_OS_VERSION_MAX_ALLOWED < 60000
-                #undef GHC_USE_STD_FS
-            #endif  
-        #endif
-    #endif
+#ifdef __APPLE__
+#include <Availability.h> // for deployment target to support pre-catalina targets without std::fs 
 #endif
-
-#ifdef GHC_USE_STD_FS
-    #include <filesystem>
-    namespace fs = std::filesystem;
-#else
-    #include "filesystem.hpp"
-    namespace fs = ghc::filesystem;
+#if ((defined(_MSVC_LANG) && _MSVC_LANG >= 201703L) || (defined(__cplusplus) && __cplusplus >= 201703L)) && defined(__has_include)
+#if __has_include(<filesystem>) && (!defined(__MAC_OS_X_VERSION_MIN_REQUIRED) || __MAC_OS_X_VERSION_MIN_REQUIRED >= 101500)
+#define GHC_USE_STD_FS
+#include <filesystem>
+namespace fs = std::filesystem;
+#endif
+#endif
+#ifndef GHC_USE_STD_FS
+#include <ghc/filesystem.hpp>
+namespace fs = ghc::filesystem;
 #endif
 ```

+**Note that this code uses a two-stage preprocessor condition because Visual Studio 2015
+doesn't like the `(<...>)` syntax, even if it could cut evaluation early before. This code also
+used the minimum deployment target to detect if `std::filesystem` really is available on macOS
+compilation.**
+
+**Note also, this detection now works on MSVC versions prior to 15.7 on, or without setting
+the `/Zc:__cplusplus` compile switch that would fix `__cplusplus` on MSVC. (Without the switch
+the compiler always reports `199711L`
+([see](https://blogs.msdn.microsoft.com/vcblog/2018/04/09/msvc-now-correctly-reports-__cplusplus/)),
+but `_MSVC_LANG` works without it.**
+
 If you want to also use the `fstream` wrapper with `path` support as fallback,
 you might use:

 ```cpp
-#if _MSVC_LANG >= 201703L || __cplusplus >= 201703L && defined(__has_include)
-    // ^ Supports MSVC prior to 15.7 without setting /Zc:__cplusplus to fix __cplusplus
-    // _MSVC_LANG works regardless. But without the switch, the compiler always reported 199711L: https://blogs.msdn.microsoft.com/vcblog/2018/04/09/msvc-now-correctly-reports-__cplusplus/
-    #if __has_include(<filesystem>) // Two stage __has_include needed for MSVC 2015 and per https://gcc.gnu.org/onlinedocs/cpp/_005f_005fhas_005finclude.html
-        #define GHC_USE_STD_FS
-
-        // Old Apple OSs don't support std::filesystem, though the header is available at compile
-        // time. In particular, std::filesystem is unavailable before macOS 10.15, iOS/tvOS 13.0,
-        // and watchOS 6.0.
-        #ifdef __APPLE__
-            #include <Availability.h>
-            // Note: This intentionally uses std::filesystem on any new Apple OS, like visionOS
-            // released after std::filesystem, where std::filesystem is always available.
-            // (All other __<platform>_VERSION_MIN_REQUIREDs will be undefined and thus 0.)
-            #if __MAC_OS_X_VERSION_MIN_REQUIRED && __MAC_OS_X_VERSION_MIN_REQUIRED < 101500 \
-             || __IPHONE_OS_VERSION_MIN_REQUIRED && __IPHONE_OS_VERSION_MIN_REQUIRED < 130000 \
-             || __TV_OS_VERSION_MIN_REQUIRED && __TV_OS_VERSION_MIN_REQUIRED < 130000 \
-             || __WATCH_OS_VERSION_MAX_ALLOWED && __WATCH_OS_VERSION_MAX_ALLOWED < 60000
-                #undef GHC_USE_STD_FS
-            #endif  
-        #endif
-    #endif
+#ifdef __APPLE__
+#include <Availability.h> // for deployment target to support pre-catalina targets without std::fs 
 #endif
-
-#ifdef GHC_USE_STD_FS
-    #include <filesystem>
-    namespace fs {
-        using namespace std::filesystem;
-        using ifstream = std::ifstream;
-        using ofstream = std::ofstream;
-        using fstream = std::fstream;
-    }
-#else
-    #include "filesystem.hpp"
-    namespace fs {
-        using namespace ghc::filesystem;
-        using ifstream = ghc::filesystem::ifstream;
-        using ofstream = ghc::filesystem::ofstream;
-        using fstream = ghc::filesystem::fstream;
-    }
+#if ((defined(_MSVC_LANG) && _MSVC_LANG >= 201703L) || (defined(__cplusplus) && __cplusplus >= 201703L)) && defined(__has_include)
+#if __has_include(<filesystem>) && (!defined(__MAC_OS_X_VERSION_MIN_REQUIRED) || __MAC_OS_X_VERSION_MIN_REQUIRED >= 101500)
+#define GHC_USE_STD_FS
+#include <filesystem>
+namespace fs {
+using namespace std::filesystem;
+using ifstream = std::ifstream;
+using ofstream = std::ofstream;
+using fstream = std::fstream;
+}
+#endif
+#endif
+#ifndef GHC_USE_STD_FS
+#include <ghc/filesystem.hpp>
+namespace fs {
+using namespace ghc::filesystem;
+using ifstream = ghc::filesystem::ifstream;
+using ofstream = ghc::filesystem::ofstream;
+using fstream = ghc::filesystem::fstream;
+}
 #endif
 ```

@ -292,46 +264,29 @@ If you use the forwarding/implementation approach, you can still use the dynamic
 switching like this:

 ```cpp
-#if _MSVC_LANG >= 201703L || __cplusplus >= 201703L && defined(__has_include)
-    // ^ Supports MSVC prior to 15.7 without setting /Zc:__cplusplus to fix __cplusplus
-    // _MSVC_LANG works regardless. But without the switch, the compiler always reported 199711L: https://blogs.msdn.microsoft.com/vcblog/2018/04/09/msvc-now-correctly-reports-__cplusplus/
-    #if __has_include(<filesystem>) // Two stage __has_include needed for MSVC 2015 and per https://gcc.gnu.org/onlinedocs/cpp/_005f_005fhas_005finclude.html
-        #define GHC_USE_STD_FS
-
-        // Old Apple OSs don't support std::filesystem, though the header is available at compile
-        // time. In particular, std::filesystem is unavailable before macOS 10.15, iOS/tvOS 13.0,
-        // and watchOS 6.0.
-        #ifdef __APPLE__
-            #include <Availability.h>
-            // Note: This intentionally uses std::filesystem on any new Apple OS, like visionOS
-            // released after std::filesystem, where std::filesystem is always available.
-            // (All other __<platform>_VERSION_MIN_REQUIREDs will be undefined and thus 0.)
-            #if __MAC_OS_X_VERSION_MIN_REQUIRED && __MAC_OS_X_VERSION_MIN_REQUIRED < 101500 \
-             || __IPHONE_OS_VERSION_MIN_REQUIRED && __IPHONE_OS_VERSION_MIN_REQUIRED < 130000 \
-             || __TV_OS_VERSION_MIN_REQUIRED && __TV_OS_VERSION_MIN_REQUIRED < 130000 \
-             || __WATCH_OS_VERSION_MAX_ALLOWED && __WATCH_OS_VERSION_MAX_ALLOWED < 60000
-                #undef GHC_USE_STD_FS
-            #endif  
-        #endif
-    #endif
+#ifdef __APPLE__
+#include <Availability.h> // for deployment target to support pre-catalina targets without std::fs
 #endif
-
-#ifdef GHC_USE_STD_FS
-    #include <filesystem>
-    namespace fs {
-        using namespace std::filesystem;
-        using ifstream = std::ifstream;
-        using ofstream = std::ofstream;
-        using fstream = std::fstream;
-    }
-#else
-    #include "fs_fwd.hpp"
-    namespace fs {
-        using namespace ghc::filesystem;
-        using ifstream = ghc::filesystem::ifstream;
-        using ofstream = ghc::filesystem::ofstream;
-        using fstream = ghc::filesystem::fstream;
-    }
+#if ((defined(_MSVC_LANG) && _MSVC_LANG >= 201703L) || (defined(__cplusplus) && __cplusplus >= 201703L)) && defined(__has_include)
+#if __has_include(<filesystem>) && (!defined(__MAC_OS_X_VERSION_MIN_REQUIRED) || __MAC_OS_X_VERSION_MIN_REQUIRED >= 101500)
+#define GHC_USE_STD_FS
+#include <filesystem>
+namespace fs {
+using namespace std::filesystem;
+using ifstream = std::ifstream;
+using ofstream = std::ofstream;
+using fstream = std::fstream;
+}
+#endif
+#endif
+#ifndef GHC_USE_STD_FS
+#include <ghc/fs-fwd.hpp>
+namespace fs {
+using namespace ghc::filesystem;
+using ifstream = ghc::filesystem::ifstream;
+using ofstream = ghc::filesystem::ofstream;
+using fstream = ghc::filesystem::fstream;
+}
 #endif
 ```

@ -339,38 +294,25 @@ and in the implementation hiding cpp, you might use (before any include that inc
 to take precedence:

 ```cpp
-#if _MSVC_LANG >= 201703L || __cplusplus >= 201703L && defined(__has_include)
-    // ^ Supports MSVC prior to 15.7 without setting /Zc:__cplusplus to fix __cplusplus
-    // _MSVC_LANG works regardless. But without the switch, the compiler always reported 199711L: https://blogs.msdn.microsoft.com/vcblog/2018/04/09/msvc-now-correctly-reports-__cplusplus/
-    #if __has_include(<filesystem>) // Two stage __has_include needed for MSVC 2015 and per https://gcc.gnu.org/onlinedocs/cpp/_005f_005fhas_005finclude.html
-        #define GHC_USE_STD_FS
-
-        // Old Apple OSs don't support std::filesystem, though the header is available at compile
-        // time. In particular, std::filesystem is unavailable before macOS 10.15, iOS/tvOS 13.0,
-        // and watchOS 6.0.
-        #ifdef __APPLE__
-            #include <Availability.h>
-            // Note: This intentionally uses std::filesystem on any new Apple OS, like visionOS
-            // released after std::filesystem, where std::filesystem is always available.
-            // (All other __<platform>_VERSION_MIN_REQUIREDs will be undefined and thus 0.)
-            #if __MAC_OS_X_VERSION_MIN_REQUIRED && __MAC_OS_X_VERSION_MIN_REQUIRED < 101500 \
-             || __IPHONE_OS_VERSION_MIN_REQUIRED && __IPHONE_OS_VERSION_MIN_REQUIRED < 130000 \
-             || __TV_OS_VERSION_MIN_REQUIRED && __TV_OS_VERSION_MIN_REQUIRED < 130000 \
-             || __WATCH_OS_VERSION_MAX_ALLOWED && __WATCH_OS_VERSION_MAX_ALLOWED < 60000
-                #undef GHC_USE_STD_FS
-            #endif  
-        #endif
-    #endif
+#ifdef __APPLE__ // for deployment target to support pre-catalina targets without std::fs 
+#include <Availability.h>
+#endif
+#if ((defined(_MSVC_LANG) && _MSVC_LANG >= 201703L) || (defined(__cplusplus) && __cplusplus >= 201703L)) && defined(__has_include)
+#if __has_include(<filesystem>) && (!defined(__MAC_OS_X_VERSION_MIN_REQUIRED) || __MAC_OS_X_VERSION_MIN_REQUIRED >= 101500)
+#define GHC_USE_STD_FS
+#endif
 #endif
-
 #ifndef GHC_USE_STD_FS
-    #include "fs_impl.hpp"
+#define GHC_FILESYSTEM_IMPLEMENTATION
+#include <ghc/filesystem.hpp>
 #endif
 ```

 :information_source: **Hint:** There are additional helper headers, named `ghc/fs_std_fwd.hpp` and
 `ghc/fs_std_impl.hpp` that use this technique, so you can simply include them
-if you want to dynamically select the filesystem implementation.
+if you want to dynamically select the filesystem implementation. they also
+enable the `wchar_t` support on `ghc::filesystem` on Windows, so the resulting
+implementation in the `fs` namespace will be compatible.



@ -397,10 +339,6 @@ The `CMakeLists.txt` offers a few options to customize its behavior:
  `CMAKE_CXX_COMPILE_FEATURES` when the detection of C++17 or C++20 for additional tests
  is not working (e.g. `cxx_std_20` to enforce building a `filesystem_test_cpp20` with C++20).

-### Bazel
-
-Please use [hedronvision/bazel-cc-filesystem-backport](https://github.com/hedronvision/bazel-cc-filesystem-backport), which will automatically set everything up for you.
-
 ### Versioning

 There is a version macro `GHC_FILESYSTEM_VERSION` defined in case future changes
@ -466,7 +404,7 @@ int main(int argc, char* argv[])
        exit(EXIT_FAILURE);
    }

-    // now use argc/argv as usual, they have utf-8 encoding on windows
+    // now use argc/argv as usual, they have utf-8 enconding on windows
    // ...

    return 0;
@ -646,49 +584,6 @@ to the expected behavior.

 ## Release Notes

-### v1.5.15 (wip)
-
-* Fix for [#166](https://github.com/gulrak/filesystem/issues/166),
-  `extension()` did return non empty result for the directory name
-  `".."`
-
-###  [v1.5.14](https://github.com/gulrak/filesystem/releases/tag/v1.5.14)
-
-* Pull request [#163](https://github.com/gulrak/filesystem/pull/163), build
-  support for Haiku (also fixes [#159](https://github.com/gulrak/filesystem/issues/159))
-* Pull request [#162](https://github.com/gulrak/filesystem/pull/162), fix for
-  directory iterator treating all files subsequent to a symlink as symlink
-  on Windows
-* Pull request [#161](https://github.com/gulrak/filesystem/pull/161), the
-  CMake alias `ghcFilesystem::ghc_filesystem` is now set unconditionally 
-* Fix for [#160](https://github.com/gulrak/filesystem/issues/160), the cmake
-  config now only sets install targets by default if the project is no
-  subproject, as documented
-* Fix for [#157](https://github.com/gulrak/filesystem/issues/157), suppress
-  C4191 warning on MSVC for GetProcAddress casts
-* Fix for [#156](https://github.com/gulrak/filesystem/issues/156), on POSIX
-  `stem()`, `filename()` and `extension()` of `fs::path` would return wrong
-  result if a colon was in the filename
-* Pull request [#154](https://github.com/gulrak/filesystem/pull/145), build
-  support for GNU/Hurd
-* Pull request [#153](https://github.com/gulrak/filesystem/pull/153), fixed
-  `fs::last_write_time(path, time, ec)` setter on iOS, tvOS and watchOS
-* Fix for [#151](https://github.com/gulrak/filesystem/issues/156),
-  `fs::directory_entry::refresh()` now, consistently with `status()` will not
-  throw on symlinks to non-existing targets, but make the entry have
-  `file_type::not_found` as the type
-* Pull request [#149](https://github.com/gulrak/filesystem/pull/149), add
-  version to CMake project and export it
-* Fix for [#146](https://github.com/gulrak/filesystem/issues/146), handle `EINTR`
-  on POSIX directory iteration and file copy to avoid errors on network
-  filesystems 
-* Pull request [#145](https://github.com/gulrak/filesystem/pull/145), fix for
-  Y2038 bug in timeToFILETIME on Windows
-* Pull request [#144](https://github.com/gulrak/filesystem/pull/144), `fs::copy_file()`
-  now also copies the permissions
-* Pull request [#143](https://github.com/gulrak/filesystem/pull/143), fix
-  for `fs::copy_file()` ignoring the `skip_existing` option.
-
 ### [v1.5.12](https://github.com/gulrak/filesystem/releases/tag/v1.5.12)

 * Fix for [#142](https://github.com/gulrak/filesystem/issues/142), removed need
--- a/cmake/GhcHelper.cmake
+++ b/cmake/GhcHelper.cmake
@ -22,9 +22,6 @@ if ("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang" AND (CMAKE_CXX_COMPILER_VERSION V
    if(${CMAKE_SYSTEM_NAME} MATCHES "(SunOS|Solaris)")
        target_link_libraries(filesystem_test xnet)
    endif()
-    if(${CMAKE_SYSTEM_NAME} MATCHES "Haiku")
-        target_link_libraries(filesystem_test network)
-    endif()
    target_compile_definitions(${targetName} PRIVATE USE_STD_FS)
 endif()

@ -37,9 +34,6 @@ if (CMAKE_COMPILER_IS_GNUCXX AND (CMAKE_CXX_COMPILER_VERSION VERSION_EQUAL 8.0 O
    if(${CMAKE_SYSTEM_NAME} MATCHES "(SunOS|Solaris)")
        target_link_libraries(${targetName} xnet)
    endif()
-    if(${CMAKE_SYSTEM_NAME} MATCHES "Haiku")
-        target_link_libraries(${targetName} network)
-    endif()
    target_compile_options(${targetName} PRIVATE $<$<BOOL:${CYGWIN}>:-Wa,-mbig-obj>)
    target_compile_definitions(${targetName} PRIVATE USE_STD_FS)
 endif()
@ -61,9 +55,6 @@ macro(AddTestExecutableWithStdCpp cppStd)
    if(${CMAKE_SYSTEM_NAME} MATCHES "(SunOS|Solaris)")
        target_link_libraries(filesystem_test_cpp${cppStd} xnet)
    endif()
-    if(${CMAKE_SYSTEM_NAME} MATCHES "Haiku")
-        target_link_libraries(filesystem_test_cpp${cppStd} network)
-    endif()
    target_compile_options(filesystem_test_cpp${cppStd} PRIVATE
            $<$<BOOL:${EMSCRIPTEN}>:-s DISABLE_EXCEPTION_CATCHING=0>
            $<$<OR:$<CXX_COMPILER_ID:Clang>,$<CXX_COMPILER_ID:AppleClang>>:-Wall -Wextra -Wshadow -Wconversion -Wsign-conversion -Wpedantic -Werror -Wno-error=deprecated-declarations>
--- a/include/ghc/filesystem.hpp
+++ b/include/ghc/filesystem.hpp
@ -25,6 +25,23 @@
 // SOFTWARE.
 //
 //---------------------------------------------------------------------------------------
+//
+// To dynamically select std::filesystem where available on most platforms,
+// you could use:
+//
+// #if ((defined(_MSVC_LANG) && _MSVC_LANG >= 201703L) || (defined(__cplusplus) && __cplusplus >= 201703L)) && defined(__has_include)
+// #if __has_include(<filesystem>) && (!defined(__MAC_OS_X_VERSION_MIN_REQUIRED) || __MAC_OS_X_VERSION_MIN_REQUIRED >= 101500)
+// #define GHC_USE_STD_FS
+// #include <filesystem>
+// namespace fs = std::filesystem;
+// #endif
+// #endif
+// #ifndef GHC_USE_STD_FS
+// #include <ghc/filesystem.hpp>
+// namespace fs = ghc::filesystem;
+// #endif
+//
+//---------------------------------------------------------------------------------------
 #ifndef GHC_FILESYSTEM_H
 #define GHC_FILESYSTEM_H

@ -36,7 +53,7 @@

 #ifndef GHC_OS_DETECTED
 #if defined(__APPLE__) && defined(__MACH__)
-#define GHC_OS_APPLE
+#define GHC_OS_MACOS
 #elif defined(__linux__)
 #define GHC_OS_LINUX
 #if defined(__ANDROID__)
@ -61,8 +78,6 @@
 #include <wasi/api.h>
 #elif defined(__QNX__)
 #define GHC_OS_QNX
-#elif defined(__HAIKU__)
-#define GHC_OS_HAIKU
 #else
 #error "Operating system currently not supported!"
 #endif
@ -164,7 +179,7 @@
 #include <langinfo.h>
 #endif
 #endif
-#ifdef GHC_OS_APPLE
+#ifdef GHC_OS_MACOS
 #include <Availability.h>
 #endif

@ -291,7 +306,7 @@
 //- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

 // ghc::filesystem version in decimal (major * 10000 + minor * 100 + patch)
-#define GHC_FILESYSTEM_VERSION 10515L
+#define GHC_FILESYSTEM_VERSION 10512L

 #if !defined(GHC_WITH_EXCEPTIONS) && (defined(__EXCEPTIONS) || defined(__cpp_exceptions) || defined(_CPPUNWIND))
 #define GHC_WITH_EXCEPTIONS
@ -1142,10 +1157,6 @@ GHC_FS_API void create_hard_link(const path& to, const path& new_hard_link, std:
 GHC_FS_API uintmax_t hard_link_count(const path& p, std::error_code& ec) noexcept;
 #endif

-#if defined(GHC_OS_WINDOWS) && (!defined(__GLIBCXX__) || (defined(_GLIBCXX_HAVE__WFOPEN) && defined(_GLIBCXX_USE_WCHAR_T)))
-#define GHC_HAS_FSTREAM_OPEN_WITH_WCHAR
-#endif
-
 // Non-C++17 add-on std::fstream wrappers with path
 template <class charT, class traits = std::char_traits<charT>>
 class basic_filebuf : public std::basic_filebuf<charT, traits>
@ -1157,7 +1168,7 @@ public:
    const basic_filebuf& operator=(const basic_filebuf&) = delete;
    basic_filebuf<charT, traits>* open(const path& p, std::ios_base::openmode mode)
    {
-#ifdef GHC_HAS_FSTREAM_OPEN_WITH_WCHAR
+#if defined(GHC_OS_WINDOWS) && !defined(__GLIBCXX__)
        return std::basic_filebuf<charT, traits>::open(p.wstring().c_str(), mode) ? this : 0;
 #else
        return std::basic_filebuf<charT, traits>::open(p.string().c_str(), mode) ? this : 0;
@ -1170,7 +1181,7 @@ class basic_ifstream : public std::basic_ifstream<charT, traits>
 {
 public:
    basic_ifstream() {}
-#ifdef GHC_HAS_FSTREAM_OPEN_WITH_WCHAR
+#if defined(GHC_OS_WINDOWS) && !defined(__GLIBCXX__)
    explicit basic_ifstream(const path& p, std::ios_base::openmode mode = std::ios_base::in)
        : std::basic_ifstream<charT, traits>(p.wstring().c_str(), mode)
    {
@ -1193,7 +1204,7 @@ class basic_ofstream : public std::basic_ofstream<charT, traits>
 {
 public:
    basic_ofstream() {}
-#ifdef GHC_HAS_FSTREAM_OPEN_WITH_WCHAR
+#if defined(GHC_OS_WINDOWS) && !defined(__GLIBCXX__)
    explicit basic_ofstream(const path& p, std::ios_base::openmode mode = std::ios_base::out)
        : std::basic_ofstream<charT, traits>(p.wstring().c_str(), mode)
    {
@ -1216,7 +1227,7 @@ class basic_fstream : public std::basic_fstream<charT, traits>
 {
 public:
    basic_fstream() {}
-#ifdef GHC_HAS_FSTREAM_OPEN_WITH_WCHAR
+#if defined(GHC_OS_WINDOWS) && !defined(__GLIBCXX__)
    explicit basic_fstream(const path& p, std::ios_base::openmode mode = std::ios_base::in | std::ios_base::out)
        : std::basic_fstream<charT, traits>(p.wstring().c_str(), mode)
    {
@ -1944,15 +1955,10 @@ GHC_INLINE void create_symlink(const path& target_name, const path& new_symlink,
 #if defined(__GNUC__) && __GNUC__ >= 8
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wcast-function-type"
-#elif defined(_MSC_VER) && !defined(__INTEL_COMPILER) && !defined(__clang__)
-#pragma warning(push)
-#pragma warning(disable : 4191)
 #endif
    static CreateSymbolicLinkW_fp api_call = reinterpret_cast<CreateSymbolicLinkW_fp>(GetProcAddress(GetModuleHandleW(L"kernel32.dll"), "CreateSymbolicLinkW"));
 #if defined(__GNUC__) && __GNUC__ >= 8
 #pragma GCC diagnostic pop
-#elif defined(_MSC_VER) && !defined(__INTEL_COMPILER) && !defined(__clang__)
-#pragma warning(pop)
 #endif
    if (api_call) {
        if (api_call(GHC_NATIVEWP(new_symlink), GHC_NATIVEWP(target_name), to_directory ? 1 : 0) == 0) {
@ -1973,15 +1979,10 @@ GHC_INLINE void create_hardlink(const path& target_name, const path& new_hardlin
 #if defined(__GNUC__) && __GNUC__ >= 8
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wcast-function-type"
-#elif defined(_MSC_VER) && !defined(__INTEL_COMPILER) && !defined(__clang__)
-#pragma warning(push)
-#pragma warning(disable : 4191)
 #endif
    static CreateHardLinkW_fp api_call = reinterpret_cast<CreateHardLinkW_fp>(GetProcAddress(GetModuleHandleW(L"kernel32.dll"), "CreateHardLinkW"));
 #if defined(__GNUC__) && __GNUC__ >= 8
 #pragma GCC diagnostic pop
-#elif defined(_MSC_VER) && !defined(__INTEL_COMPILER) && !defined(__clang__)
-#pragma warning(pop)
 #endif
    if (api_call) {
        if (api_call(GHC_NATIVEWP(new_hardlink), GHC_NATIVEWP(target_name), NULL) == 0) {
@ -2240,10 +2241,10 @@ GHC_INLINE time_t timeFromFILETIME(const FILETIME& ft)

 GHC_INLINE void timeToFILETIME(time_t t, FILETIME& ft)
 {
-    ULARGE_INTEGER ull;
-    ull.QuadPart = static_cast<ULONGLONG>((t * 10000000LL) + 116444736000000000LL);
-    ft.dwLowDateTime = ull.LowPart;
-    ft.dwHighDateTime = ull.HighPart;
+    LONGLONG ll;
+    ll = Int32x32To64(t, 10000000) + 116444736000000000;
+    ft.dwLowDateTime = static_cast<DWORD>(ll);
+    ft.dwHighDateTime = static_cast<DWORD>(ll >> 32);
 }

 template <typename INFO>
@ -2259,43 +2260,41 @@ GHC_INLINE uintmax_t hard_links_from_INFO<BY_HANDLE_FILE_INFORMATION>(const BY_H
 }

 template <typename INFO>
-GHC_INLINE bool is_symlink_from_INFO(const path &p, const INFO* info, std::error_code& ec)
+GHC_INLINE DWORD reparse_tag_from_INFO(const INFO*)
 {
-    if ((info->dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT)) {
-        auto reparseData = detail::getReparseData(p, ec);
-        if (!ec && reparseData && IsReparseTagMicrosoft(reparseData->ReparseTag) && reparseData->ReparseTag == IO_REPARSE_TAG_SYMLINK) {
-            return true;
-        }
-    }
-    return false;
+    return 0;
 }

 template <>
-GHC_INLINE bool is_symlink_from_INFO(const path &, const WIN32_FIND_DATAW* info, std::error_code&)
+GHC_INLINE DWORD reparse_tag_from_INFO(const WIN32_FIND_DATAW* info)
 {
-    // dwReserved0 is undefined unless dwFileAttributes includes the
-    // FILE_ATTRIBUTE_REPARSE_POINT attribute according to microsoft
-    // documentation. In practice, dwReserved0 is not reset which
-    // causes it to report the incorrect symlink status.
-    // Note that microsoft documentation does not say whether there is
-    // a null value for dwReserved0, so we test for symlink directly
-    // instead of returning the tag which requires returning a null
-    // value for non-reparse-point files.
-    return (info->dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) && info->dwReserved0 == IO_REPARSE_TAG_SYMLINK;
+    return info->dwReserved0;
 }

 template <typename INFO>
 GHC_INLINE file_status status_from_INFO(const path& p, const INFO* info, std::error_code& ec, uintmax_t* sz = nullptr, time_t* lwt = nullptr)
 {
    file_type ft = file_type::unknown;
-    if (is_symlink_from_INFO(p, info, ec)) {
-        ft = file_type::symlink;
-    }
-    else if ((info->dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)) {
-        ft = file_type::directory;
+    if (sizeof(INFO) == sizeof(WIN32_FIND_DATAW)) {
+        if (detail::reparse_tag_from_INFO(info) == IO_REPARSE_TAG_SYMLINK) {
+            ft = file_type::symlink;
+        }
    }
    else {
-        ft = file_type::regular;
+        if ((info->dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT)) {
+            auto reparseData = detail::getReparseData(p, ec);
+            if (!ec && reparseData && IsReparseTagMicrosoft(reparseData->ReparseTag) && reparseData->ReparseTag == IO_REPARSE_TAG_SYMLINK) {
+                ft = file_type::symlink;
+            }
+        }
+    }
+    if (ft == file_type::unknown) {
+        if ((info->dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)) {
+            ft = file_type::directory;
+        }
+        else {
+            ft = file_type::regular;
+        }
    }
    perms prms = perms::owner_read | perms::group_read | perms::others_read;
    if (!(info->dwFileAttributes & FILE_ATTRIBUTE_READONLY)) {
@ -3157,7 +3156,7 @@ GHC_INLINE path path::extension() const
        auto iter = end();
        const auto& fn = *--iter;
        impl_string_type::size_type pos = fn._path.rfind('.');
-        if (pos != std::string::npos && pos > 0 && fn._path != "..") {
+        if (pos != std::string::npos && pos > 0) {
            return path(fn._path.substr(pos), native_format);
        }
    }
@ -3306,9 +3305,6 @@ GHC_INLINE path path::lexically_relative(const path& base) const
            --count;
        }
    }
-    if (count == 0 && (a == end() || a->empty())) {
-        return path(".");
-    }
    if (count < 0) {
        return path();
    }
@ -3369,14 +3365,10 @@ GHC_INLINE path::impl_string_type::const_iterator path::iterator::increment(cons
            }
        }
        else {
-#ifdef GHC_OS_WINDOWS
            if (fromStart && i != _last && *i == ':') {
                ++i;
            }
            else {
-#else
-            {
-#endif
                i = std::find(i, _last, preferred_separator);
            }
        }
@ -3920,14 +3912,11 @@ GHC_INLINE bool copy_file(const path& from, const path& to, copy_options options
        ec = tecf;
        return false;
    }
+    if (exists(st) && (!is_regular_file(st) || equivalent(from, to, ec) || (options & (copy_options::skip_existing | copy_options::overwrite_existing | copy_options::update_existing)) == copy_options::none)) {
+        ec = tect ? tect : detail::make_error_code(detail::portable_error::exists);
+        return false;
+    }
    if (exists(st)) {
-        if ((options & copy_options::skip_existing) == copy_options::skip_existing) {
-            return false;
-        }
-        if (!is_regular_file(st) || equivalent(from, to, ec) || (options & (copy_options::overwrite_existing | copy_options::update_existing)) == copy_options::none) {
-            ec = tect ? tect : detail::make_error_code(detail::portable_error::exists);
-            return false;
-        }
        if ((options & copy_options::update_existing) == copy_options::update_existing) {
            auto from_time = last_write_time(from, ec);
            if (ec) {
@ -3967,33 +3956,15 @@ GHC_INLINE bool copy_file(const path& from, const path& to, copy_options options
        ::close(in);
        return false;
    }
-    if (st.permissions() != sf.permissions()) {
-        if (::fchmod(out, static_cast<mode_t>(sf.permissions() & perms::all)) != 0) {
-            ec = detail::make_system_error();
-            ::close(in);
-            ::close(out);
-            return false;
-        }
-    }
    ssize_t br, bw;
-    while (true) {
-        do { br = ::read(in, buffer.data(), buffer.size()); } while(errno == EINTR && !br);
-        if(!br) {
-            break;
-        }
-        if(br < 0) {
-            ec = detail::make_system_error();
-            ::close(in);
-            ::close(out);
-            return false;
-        }
+    while ((br = ::read(in, buffer.data(), buffer.size())) > 0) {
        ssize_t offset = 0;
        do {
            if ((bw = ::write(out, buffer.data() + offset, static_cast<size_t>(br))) > 0) {
                br -= bw;
                offset += bw;
            }
-            else if (bw < 0 && errno != EINTR) {
+            else if (bw < 0) {
                ec = detail::make_system_error();
                ::close(in);
                ::close(out);
@ -4228,13 +4199,6 @@ GHC_INLINE path current_path(std::error_code& ec)
        return path();
    }
    return path(std::wstring(buffer.get()), path::native_format);
-#elif defined(__GLIBC__)
-    std::unique_ptr<char, decltype(&std::free)> buffer { ::get_current_dir_name(), std::free };
-    if (buffer == nullptr) {
-        ec = detail::make_system_error();
-        return path();
-    }
-    return path(buffer.get());
 #else
    size_t pathlen = static_cast<size_t>(std::max(int(::pathconf(".", _PC_PATH_MAX)), int(PATH_MAX)));
    std::unique_ptr<char[]> buffer(new char[pathlen + 1]);
@ -4640,11 +4604,9 @@ GHC_INLINE void last_write_time(const path& p, file_time_type new_time, std::err
    if (!::SetFileTime(file.get(), 0, 0, &ft)) {
        ec = detail::make_system_error();
    }
-#elif defined(GHC_OS_APPLE) && \
-    (__MAC_OS_X_VERSION_MIN_REQUIRED && __MAC_OS_X_VERSION_MIN_REQUIRED < 101300 \
-     || __IPHONE_OS_VERSION_MIN_REQUIRED && __IPHONE_OS_VERSION_MIN_REQUIRED < 110000 \
-     || __TV_OS_VERSION_MIN_REQUIRED && __TVOS_VERSION_MIN_REQUIRED < 110000 \
-     || __WATCH_OS_VERSION_MIN_REQUIRED && __WATCHOS_VERSION_MIN_REQUIRED < 40000)
+#elif defined(GHC_OS_MACOS)
+#ifdef __MAC_OS_X_VERSION_MIN_REQUIRED
+#if __MAC_OS_X_VERSION_MIN_REQUIRED < 101300
    struct ::stat fs;
    if (::stat(p.c_str(), &fs) == 0) {
        struct ::timeval tv[2];
@ -4658,6 +4620,18 @@ GHC_INLINE void last_write_time(const path& p, file_time_type new_time, std::err
    }
    ec = detail::make_system_error();
    return;
+#else
+    struct ::timespec times[2];
+    times[0].tv_sec = 0;
+    times[0].tv_nsec = UTIME_OMIT;
+    times[1].tv_sec = std::chrono::duration_cast<std::chrono::seconds>(d).count();
+    times[1].tv_nsec = 0;  // std::chrono::duration_cast<std::chrono::nanoseconds>(d).count() % 1000000000;
+    if (::utimensat(AT_FDCWD, p.c_str(), times, AT_SYMLINK_NOFOLLOW) != 0) {
+        ec = detail::make_system_error();
+    }
+    return;
+#endif
+#endif
 #else
 #ifndef UTIME_OMIT
 #define UTIME_OMIT ((1l << 30) - 2l)
@ -5285,7 +5259,7 @@ GHC_INLINE void directory_entry::refresh()
 {
    std::error_code ec;
    refresh(ec);
-    if (ec && (_status.type() == file_type::none || _symlink_status.type() != file_type::symlink)) {
+    if (ec) {
        throw filesystem_error(detail::systemErrorText(ec.value()), _path, ec);
    }
 }
@ -5696,7 +5670,7 @@ public:
        , _entry(nullptr)
    {
        if (!path.empty()) {
-            do { _dir = ::opendir(path.native().c_str()); } while(errno == EINTR && !_dir);
+            _dir = ::opendir(path.native().c_str());
            if (!_dir) {
                auto error = errno;
                _base = filesystem::path();
@ -5723,7 +5697,7 @@ public:
            do {
                skip = false;
                errno = 0;
-                do { _entry = ::readdir(_dir); } while(errno == EINTR && !_entry);
+                _entry = ::readdir(_dir);
                if (_entry) {
                    _dir_entry._path = _base;
                    _dir_entry._path.append_name(_entry->d_name);
@ -5737,7 +5711,7 @@ public:
                    ::closedir(_dir);
                    _dir = nullptr;
                    _dir_entry._path.clear();
-                    if (errno && errno != EINTR) {
+                    if (errno) {
                        ec = detail::make_system_error();
                    }
                    break;
--- a/include/ghc/fs_fwd.hpp
+++ b/include/ghc/fs_fwd.hpp
@ -25,7 +25,7 @@
 // SOFTWARE.
 //
 //---------------------------------------------------------------------------------------
-// fs_fwd.hpp - The forwarding header for the header/implementation separated usage of
+// fs_fwd.hpp - The forwarding header for the header/implementation seperated usage of
 //              ghc::filesystem.
 // This file can be include at any place, where ghc::filesystem api is needed while
 // not bleeding implementation details (e.g. system includes) into the global namespace,
@ -34,5 +34,5 @@
 #ifndef GHC_FILESYSTEM_FWD_H
 #define GHC_FILESYSTEM_FWD_H
 #define GHC_FILESYSTEM_FWD
-#include "filesystem.hpp"
+#include <ghc/filesystem.hpp>
 #endif // GHC_FILESYSTEM_FWD_H
--- a/include/ghc/fs_impl.hpp
+++ b/include/ghc/fs_impl.hpp
@ -25,11 +25,11 @@
 // SOFTWARE.
 //
 //---------------------------------------------------------------------------------------
-// fs_impl.hpp - The implementation header for the header/implementation separated usage of
+// fs_impl.hpp - The implementation header for the header/implementation seperated usage of
 //               ghc::filesystem.
 // This file can be used to hide the implementation of ghc::filesystem into a single cpp.
 // The cpp has to include this before including fs_fwd.hpp directly or via a different
 // header to work.
 //---------------------------------------------------------------------------------------
 #define GHC_FILESYSTEM_IMPLEMENTATION
-#include "filesystem.hpp"
+#include <ghc/filesystem.hpp>
--- a/include/ghc/fs_std.hpp
+++ b/include/ghc/fs_std.hpp
@ -31,47 +31,30 @@
 //---------------------------------------------------------------------------------------
 #ifndef GHC_FILESYSTEM_STD_H
 #define GHC_FILESYSTEM_STD_H
-
-#if defined(_MSVC_LANG) && _MSVC_LANG >= 201703L || __cplusplus >= 201703L && defined(__has_include)
-    // ^ Supports MSVC prior to 15.7 without setting /Zc:__cplusplus to fix __cplusplus
-    // _MSVC_LANG works regardless. But without the switch, the compiler always reported 199711L: https://blogs.msdn.microsoft.com/vcblog/2018/04/09/msvc-now-correctly-reports-__cplusplus/
-    #if __has_include(<filesystem>) // Two stage __has_include needed for MSVC 2015 and per https://gcc.gnu.org/onlinedocs/cpp/_005f_005fhas_005finclude.html
-        #define GHC_USE_STD_FS
-
-        // Old Apple OSs don't support std::filesystem, though the header is available at compile
-        // time. In particular, std::filesystem is unavailable before macOS 10.15, iOS/tvOS 13.0,
-        // and watchOS 6.0.
-        #ifdef __APPLE__
-            #include <Availability.h>
-            // Note: This intentionally uses std::filesystem on any new Apple OS, like visionOS
-            // released after std::filesystem, where std::filesystem is always available.
-            // (All other __<platform>_VERSION_MIN_REQUIREDs will be undefined and thus 0.)
-            #if defined(__MAC_OS_X_VERSION_MIN_REQUIRED) && __MAC_OS_X_VERSION_MIN_REQUIRED < 101500 \
-             || defined(__IPHONE_OS_VERSION_MIN_REQUIRED) && __IPHONE_OS_VERSION_MIN_REQUIRED < 130000 \
-             || defined(__TV_OS_VERSION_MIN_REQUIRED) && __TV_OS_VERSION_MIN_REQUIRED < 130000 \
-             || defined(__WATCH_OS_VERSION_MAX_ALLOWED) && __WATCH_OS_VERSION_MAX_ALLOWED < 60000
-                #undef GHC_USE_STD_FS
-            #endif
-        #endif
-    #endif
+#if defined(__APPLE__)
+#include <Availability.h>
 #endif
-
-#ifdef GHC_USE_STD_FS
-    #include <filesystem>
-    namespace fs {
-        using namespace std::filesystem;
-        using ifstream = std::ifstream;
-        using ofstream = std::ofstream;
-        using fstream = std::fstream;
-    }
-#else
-    #include "filesystem.hpp"
-    namespace fs {
-        using namespace ghc::filesystem;
-        using ifstream = ghc::filesystem::ifstream;
-        using ofstream = ghc::filesystem::ofstream;
-        using fstream = ghc::filesystem::fstream;
-    }
+#if ((defined(_MSVC_LANG) && _MSVC_LANG >= 201703L) || (defined(__cplusplus) && __cplusplus >= 201703L)) && defined(__has_include)
+#if __has_include(<filesystem>) && (!defined(__MAC_OS_X_VERSION_MIN_REQUIRED) || __MAC_OS_X_VERSION_MIN_REQUIRED >= 101500)
+#define GHC_USE_STD_FS
+#include <filesystem>
+namespace fs {
+using namespace std::filesystem;
+using ifstream = std::ifstream;
+using ofstream = std::ofstream;
+using fstream = std::fstream;
+}
+#endif
+#endif
+#ifndef GHC_USE_STD_FS
+//#define GHC_WIN_DISABLE_WSTRING_STORAGE_TYPE
+#include <ghc/filesystem.hpp>
+namespace fs {
+using namespace ghc::filesystem;
+using ifstream = ghc::filesystem::ifstream;
+using ofstream = ghc::filesystem::ofstream;
+using fstream = ghc::filesystem::fstream;
+} 
 #endif
-
 #endif // GHC_FILESYSTEM_STD_H
+
--- a/include/ghc/fs_std_fwd.hpp
+++ b/include/ghc/fs_std_fwd.hpp
@ -25,7 +25,7 @@
 // SOFTWARE.
 //
 //---------------------------------------------------------------------------------------
-// fs_std_fwd.hpp - The forwarding header for the header/implementation separated usage of
+// fs_std_fwd.hpp - The forwarding header for the header/implementation seperated usage of
 //                  ghc::filesystem that uses std::filesystem if it detects it.
 // This file can be include at any place, where fs::filesystem api is needed while
 // not bleeding implementation details (e.g. system includes) into the global namespace,
@ -33,47 +33,31 @@
 //---------------------------------------------------------------------------------------
 #ifndef GHC_FILESYSTEM_STD_FWD_H
 #define GHC_FILESYSTEM_STD_FWD_H
-
-#if defined(_MSVC_LANG) && _MSVC_LANG >= 201703L || __cplusplus >= 201703L && defined(__has_include)
-    // ^ Supports MSVC prior to 15.7 without setting /Zc:__cplusplus to fix __cplusplus
-    // _MSVC_LANG works regardless. But without the switch, the compiler always reported 199711L: https://blogs.msdn.microsoft.com/vcblog/2018/04/09/msvc-now-correctly-reports-__cplusplus/
-    #if __has_include(<filesystem>) // Two stage __has_include needed for MSVC 2015 and per https://gcc.gnu.org/onlinedocs/cpp/_005f_005fhas_005finclude.html
-        #define GHC_USE_STD_FS
-
-        // Old Apple OSs don't support std::filesystem, though the header is available at compile
-        // time. In particular, std::filesystem is unavailable before macOS 10.15, iOS/tvOS 13.0,
-        // and watchOS 6.0.
-        #ifdef __APPLE__
-            #include <Availability.h>
-            // Note: This intentionally uses std::filesystem on any new Apple OS, like visionOS
-            // released after std::filesystem, where std::filesystem is always available.
-            // (All other __<platform>_VERSION_MIN_REQUIREDs will be undefined and thus 0.)
-            #if defined(__MAC_OS_X_VERSION_MIN_REQUIRED) && __MAC_OS_X_VERSION_MIN_REQUIRED < 101500 \
-             || defined(__IPHONE_OS_VERSION_MIN_REQUIRED) && __IPHONE_OS_VERSION_MIN_REQUIRED < 130000 \
-             || defined(__TV_OS_VERSION_MIN_REQUIRED) && __TV_OS_VERSION_MIN_REQUIRED < 130000 \
-             || defined(__WATCH_OS_VERSION_MAX_ALLOWED) && __WATCH_OS_VERSION_MAX_ALLOWED < 60000
-                #undef GHC_USE_STD_FS
-            #endif
-        #endif
-    #endif
+#if defined(__APPLE__)
+#include <Availability.h>
 #endif
-
-#ifdef GHC_USE_STD_FS
-    #include <filesystem>
-    namespace fs {
-        using namespace std::filesystem;
-        using ifstream = std::ifstream;
-        using ofstream = std::ofstream;
-        using fstream = std::fstream;
-    }
-#else
-    #include "fs_fwd.hpp"
-    namespace fs {
-        using namespace ghc::filesystem;
-        using ifstream = ghc::filesystem::ifstream;
-        using ofstream = ghc::filesystem::ofstream;
-        using fstream = ghc::filesystem::fstream;
-    }
+#if ((defined(_MSVC_LANG) && _MSVC_LANG >= 201703L) || (defined(__cplusplus) && __cplusplus >= 201703L)) && defined(__has_include)
+#if __has_include(<filesystem>) && (!defined(__MAC_OS_X_VERSION_MIN_REQUIRED) || __MAC_OS_X_VERSION_MIN_REQUIRED >= 101500)
+#define GHC_USE_STD_FS
+#include <filesystem>
+namespace fs {
+using namespace std::filesystem;
+using ifstream = std::ifstream;
+using ofstream = std::ofstream;
+using fstream = std::fstream;
+}
+#endif
+#endif
+#ifndef GHC_USE_STD_FS
+//#define GHC_WIN_DISABLE_WSTRING_STORAGE_TYPE
+#define GHC_FILESYSTEM_FWD
+#include <ghc/filesystem.hpp>
+namespace fs {
+using namespace ghc::filesystem;
+using ifstream = ghc::filesystem::ifstream;
+using ofstream = ghc::filesystem::ofstream;
+using fstream = ghc::filesystem::fstream;
+} 
 #endif
-
 #endif // GHC_FILESYSTEM_STD_FWD_H
+
--- a/include/ghc/fs_std_impl.hpp
+++ b/include/ghc/fs_std_impl.hpp
@ -25,36 +25,22 @@
 // SOFTWARE.
 //
 //---------------------------------------------------------------------------------------
-// fs_std_impl.hpp - The implementation header for the header/implementation separated usage of
+// fs_std_impl.hpp - The implementation header for the header/implementation seperated usage of
 //                   ghc::filesystem that does nothing if std::filesystem is detected.
 // This file can be used to hide the implementation of ghc::filesystem into a single cpp.
 // The cpp has to include this before including fs_std_fwd.hpp directly or via a different
 // header to work.
 //---------------------------------------------------------------------------------------
-#if defined(_MSVC_LANG) && _MSVC_LANG >= 201703L || __cplusplus >= 201703L && defined(__has_include)
-    // ^ Supports MSVC prior to 15.7 without setting /Zc:__cplusplus to fix __cplusplus
-    // _MSVC_LANG works regardless. But without the switch, the compiler always reported 199711L: https://blogs.msdn.microsoft.com/vcblog/2018/04/09/msvc-now-correctly-reports-__cplusplus/
-    #if __has_include(<filesystem>) // Two stage __has_include needed for MSVC 2015 and per https://gcc.gnu.org/onlinedocs/cpp/_005f_005fhas_005finclude.html
-        #define GHC_USE_STD_FS
-
-        // Old Apple OSs don't support std::filesystem, though the header is available at compile
-        // time. In particular, std::filesystem is unavailable before macOS 10.15, iOS/tvOS 13.0,
-        // and watchOS 6.0.
-        #ifdef __APPLE__
-            #include <Availability.h>
-            // Note: This intentionally uses std::filesystem on any new Apple OS, like visionOS
-            // released after std::filesystem, where std::filesystem is always available.
-            // (All other __<platform>_VERSION_MIN_REQUIREDs will be undefined and thus 0.)
-            #if defined(__MAC_OS_X_VERSION_MIN_REQUIRED) && __MAC_OS_X_VERSION_MIN_REQUIRED < 101500 \
-             || defined(__IPHONE_OS_VERSION_MIN_REQUIRED) && __IPHONE_OS_VERSION_MIN_REQUIRED < 130000 \
-             || defined(__TV_OS_VERSION_MIN_REQUIRED) && __TV_OS_VERSION_MIN_REQUIRED < 130000 \
-             || defined(__WATCH_OS_VERSION_MAX_ALLOWED) && __WATCH_OS_VERSION_MAX_ALLOWED < 60000
-                #undef GHC_USE_STD_FS
-            #endif
-        #endif
-    #endif
+#if defined(__APPLE__)
+#include <Availability.h>
+#endif
+#if ((defined(_MSVC_LANG) && _MSVC_LANG >= 201703L) || (defined(__cplusplus) && __cplusplus >= 201703L)) && defined(__has_include)
+#if __has_include(<filesystem>) && (!defined(__MAC_OS_X_VERSION_MIN_REQUIRED) || __MAC_OS_X_VERSION_MIN_REQUIRED >= 101500)
+#define GHC_USE_STD_FS
+#endif
 #endif
-
 #ifndef GHC_USE_STD_FS
-    #include "fs_impl.hpp"
+//#define GHC_WIN_DISABLE_WSTRING_STORAGE_TYPE
+#define GHC_FILESYSTEM_IMPLEMENTATION
+#include <ghc/filesystem.hpp>
 #endif
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@ -3,11 +3,6 @@ set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_CURRENT_SOURCE_DIR}/cmake/")
 set(PARSE_CATCH_TESTS_ADD_TO_CONFIGURE_DEPENDS ON)
 include(ParseAndAddCatchTests)

-if("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang" AND UNIX AND NOT APPLE AND NOT BSD)
-    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -stdlib=libc++")
-    set(CMAKE_EXE_LINKER_FLAGS "-lc++abi")
-endif()
-
 function(SetTestCompileOptions target_name)
    target_compile_options(${target_name} PRIVATE
        $<$<BOOL:${EMSCRIPTEN}>:-s DISABLE_EXCEPTION_CATCHING=0>
@ -30,9 +25,6 @@ if(GHC_COVERAGE)
    if(${CMAKE_SYSTEM_NAME} MATCHES "(SunOS|Solaris)")
        target_link_libraries(filesystem_test PUBLIC xnet)
    endif()
-    if(${CMAKE_SYSTEM_NAME} MATCHES "Haiku")
-        target_link_libraries(filesystem_test PUBLIC network)
-    endif()
    if("cxx_std_17" IN_LIST GHC_FILESYSTEM_TEST_COMPILE_FEATURES)
        AddTestExecutableWithStdCpp(17 filesystem_test.cpp catch.hpp)
    endif()
@ -46,9 +38,6 @@ else()
    if(${CMAKE_SYSTEM_NAME} MATCHES "(SunOS|Solaris)")
        target_link_libraries(filesystem_test xnet)
    endif()
-    if(${CMAKE_SYSTEM_NAME} MATCHES "Haiku")
-        target_link_libraries(filesystem_test network)
-    endif()
    SetTestCompileOptions(filesystem_test)
    if(CMAKE_CXX_COMPILER_ID MATCHES MSVC)
        target_compile_definitions(filesystem_test PRIVATE _CRT_SECURE_NO_WARNINGS WIN32_LEAN_AND_MEAN NOMINMAX)
@ -88,9 +77,6 @@ target_link_libraries(fwd_impl_test ghc_filesystem)
 if(${CMAKE_SYSTEM_NAME} MATCHES "(SunOS|Solaris)")
    target_link_libraries(fwd_impl_test xnet)
 endif()
-if(${CMAKE_SYSTEM_NAME} MATCHES "Haiku")
-    target_link_libraries(fwd_impl_test network)
-endif()
 SetTestCompileOptions(fwd_impl_test)
 if(CMAKE_CXX_COMPILER_ID MATCHES MSVC)
 	target_compile_definitions(fwd_impl_test PRIVATE _CRT_SECURE_NO_WARNINGS WIN32_LEAN_AND_MEAN NOMINMAX)
--- a/test/filesystem_test.cpp
+++ b/test/filesystem_test.cpp
@ -99,7 +99,7 @@ using fstream = ghc::filesystem::fstream;
 //- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

 template <typename TP>
-static std::time_t to_time_t(TP tp)
+std::time_t to_time_t(TP tp)
 {
    using namespace std::chrono;
    auto sctp = time_point_cast<system_clock::duration>(tp - TP::clock::now() + system_clock::now());
@ -107,7 +107,7 @@ static std::time_t to_time_t(TP tp)
 }

 template <typename TP>
-static TP from_time_t(std::time_t t)
+TP from_time_t(std::time_t t)
 {
    using namespace std::chrono;
    auto sctp = system_clock::from_time_t(t);
@ -214,8 +214,7 @@ static void generateFile(const fs::path& pathname, int withSize = -1)
 }

 #ifdef GHC_OS_WINDOWS
-#if !defined(_WIN64) && defined(KEY_WOW64_64KEY)
-static bool isWow64Proc()
+inline bool isWow64Proc()
 {
    typedef BOOL(WINAPI * IsWow64Process_t)(HANDLE, PBOOL);
    BOOL bIsWow64 = FALSE;
@ -227,7 +226,6 @@ static bool isWow64Proc()
    }
    return bIsWow64 == TRUE;
 }
-#endif

 static bool is_symlink_creation_supported()
 {
@ -305,13 +303,13 @@ public:
 };

 template <class T, class U>
-static bool operator==(TestAllocator<T> const&, TestAllocator<U> const&) noexcept
+bool operator==(TestAllocator<T> const&, TestAllocator<U> const&) noexcept
 {
    return true;
 }

 template <class T, class U>
-static bool operator!=(TestAllocator<T> const& x, TestAllocator<U> const& y) noexcept
+bool operator!=(TestAllocator<T> const& x, TestAllocator<U> const& y) noexcept
 {
    return !(x == y);
 }
@ -792,9 +790,6 @@ TEST_CASE("fs.path.decompose - path decomposition", "[filesystem][path][fs.path.
    CHECK(fs::path("C:/foo").filename() == "foo");
    CHECK(fs::path("C:\\foo").filename() == "foo");
    CHECK(fs::path("C:foo").filename() == "foo");
-    CHECK(fs::path("t:est.txt").filename() == "est.txt");
-#else
-    CHECK(fs::path("t:est.txt").filename() == "t:est.txt");
 #endif

    // stem()
@ -812,13 +807,6 @@ TEST_CASE("fs.path.decompose - path decomposition", "[filesystem][path][fs.path.
    CHECK(fs::path("/foo/.profile").stem() == ".profile");
    CHECK(fs::path(".bar").stem() == ".bar");
    CHECK(fs::path("..bar").stem() == ".");
-#ifdef GHC_OS_WINDOWS
-    CHECK(fs::path("t:est.txt").stem() == "est");
-#else
-    CHECK(fs::path("t:est.txt").stem() == "t:est");
-#endif
-    CHECK(fs::path("/foo/.").stem() == ".");
-    CHECK(fs::path("/foo/..").stem() == "..");

    // extension()
    CHECK(fs::path("/foo/bar.txt").extension() == ".txt");
@ -826,9 +814,6 @@ TEST_CASE("fs.path.decompose - path decomposition", "[filesystem][path][fs.path.
    CHECK(fs::path("/foo/.profile").extension() == "");
    CHECK(fs::path(".bar").extension() == "");
    CHECK(fs::path("..bar").extension() == ".bar");
-    CHECK(fs::path("t:est.txt").extension() == ".txt");
-    CHECK(fs::path("/foo/.").extension() == "");
-    CHECK(fs::path("/foo/..").extension() == "");

    if (has_host_root_name_support()) {
        // //host-based root-names
@ -965,10 +950,6 @@ TEST_CASE("fs.path.gen - path generation", "[filesystem][path][fs.path.gen]")
    // lexically_relative()
    CHECK(fs::path("/a/d").lexically_relative("/a/b/c") == "../../d");
    CHECK(fs::path("/a/b/c").lexically_relative("/a/d") == "../b/c");
-    CHECK(fs::path("/a/b/c").lexically_relative("/a/b/c/d/..") == ".");
-    CHECK(fs::path("/a/b/c/").lexically_relative("/a/b/c/d/..") == ".");
-    CHECK(fs::path("").lexically_relative("/a/..") == "");
-    CHECK(fs::path("").lexically_relative("a/..") == ".");
    CHECK(fs::path("a/b/c").lexically_relative("a") == "b/c");
    CHECK(fs::path("a/b/c").lexically_relative("a/b/c/x/y") == "../..");
    CHECK(fs::path("a/b/c").lexically_relative("a/b/c") == ".");
@ -1218,7 +1199,7 @@ TEST_CASE("fs.class.filesystem_error - class filesystem_error", "[filesystem][fi
    CHECK(fse.path2() == "some/other");
 }

-static constexpr fs::perms constExprOwnerAll()
+constexpr fs::perms constExprOwnerAll()
 {
    return fs::perms::owner_read | fs::perms::owner_write | fs::perms::owner_exec;
 }
@ -1396,16 +1377,6 @@ TEST_CASE("fs.dir.entry - class directory_entry", "[filesystem][directory_entry]
    CHECK(!(d2 != d2));
    CHECK(d1 == d1);
    CHECK(!(d1 == d2));
-    if(is_symlink_creation_supported()) {
-        fs::create_symlink(t.path() / "nonexistent", t.path() / "broken");
-        for (auto d3 : fs::directory_iterator(t.path())) {
-            CHECK_NOTHROW(d3.symlink_status());
-            CHECK_NOTHROW(d3.status());
-            CHECK_NOTHROW(d3.refresh());
-        }
-        fs::directory_entry entry(t.path() / "broken");
-        CHECK_NOTHROW(entry.refresh());
-    }
 }

 TEST_CASE("fs.class.directory_iterator - class directory_iterator", "[filesystem][directory_iterator][fs.class.directory_iterator]")
@ -1807,19 +1778,6 @@ TEST_CASE("fs.op.copy_file - copy_file", "[filesystem][operations][fs.op.copy_fi
    CHECK_NOTHROW(fs::copy_file("foobar", "foobar2", ec));
    CHECK(ec);
    CHECK(!fs::exists("foobar"));
-    fs::path file1("temp1.txt");
-    fs::path file2("temp2.txt");
-    generateFile(file1, 200);
-    generateFile(file2, 200);
-    auto allWrite = fs::perms::owner_write | fs::perms::group_write | fs::perms::others_write;
-    CHECK_NOTHROW(fs::permissions(file1, allWrite, fs::perm_options::remove));
-    CHECK((fs::status(file1).permissions() & fs::perms::owner_write) != fs::perms::owner_write);
-    CHECK_NOTHROW(fs::permissions(file2, allWrite, fs::perm_options::add));
-    CHECK((fs::status(file2).permissions() & fs::perms::owner_write) == fs::perms::owner_write);
-    fs::copy_file(file1, file2, fs::copy_options::overwrite_existing);
-    CHECK((fs::status(file2).permissions() & fs::perms::owner_write) != fs::perms::owner_write);
-    CHECK_NOTHROW(fs::permissions(file1, allWrite, fs::perm_options::add));
-    CHECK_NOTHROW(fs::permissions(file2, allWrite, fs::perm_options::add));
 }

 TEST_CASE("fs.op.copy_symlink - copy_symlink", "[filesystem][operations][fs.op.copy_symlink]")