commit 00c8f2a5e3a21d93a03182cacbae4badc02a37f1
Author: Jonathan Wakely <jwakely@redhat.com>
Date:   Sat May 23 09:00:16 2020 +0100

    libstdc++: Remove incorrect static specifiers
    
    These functions were originally static members of the path class, but
    the 'static' specifiers were not removed when they were moved to
    namespace scope. This causes ODR violations when the functions are
    called from functions defined in the header, which is incompatible with
    Nathan's modules branch.  Change them to 'inline' instead.
    
            * include/bits/fs_path.h (__detail::_S_range_begin)
            (__detail::_S_range_end): Remove unintentional static specifiers.
            * include/experimental/bits/fs_path.h (__detail::_S_range_begin)
            (__detail::_S_range_end): Likewise.

diff --git a/libstdc++-v3/include/bits/fs_path.h b/libstdc++-v3/include/bits/fs_path.h
index 5a998284a99..818b5918927 100644
--- a/libstdc++-v3/include/bits/fs_path.h
+++ b/libstdc++-v3/include/bits/fs_path.h
@@ -156,32 +156,32 @@ namespace __detail
     using _Path2 = enable_if_t<__is_path_iter_src<_Tr>::value, path>;
 
   template<typename _Source>
-    static _Source
+    _Source
     _S_range_begin(_Source __begin) { return __begin; }
 
   struct __null_terminated { };
 
   template<typename _Source>
-    static __null_terminated
+    __null_terminated
     _S_range_end(_Source) { return {}; }
 
   template<typename _CharT, typename _Traits, typename _Alloc>
-    static const _CharT*
+    inline const _CharT*
     _S_range_begin(const basic_string<_CharT, _Traits, _Alloc>& __str)
     { return __str.data(); }
 
   template<typename _CharT, typename _Traits, typename _Alloc>
-    static const _CharT*
+    inline const _CharT*
     _S_range_end(const basic_string<_CharT, _Traits, _Alloc>& __str)
     { return __str.data() + __str.size(); }
 
   template<typename _CharT, typename _Traits>
-    static const _CharT*
+    inline const _CharT*
     _S_range_begin(const basic_string_view<_CharT, _Traits>& __str)
     { return __str.data(); }
 
   template<typename _CharT, typename _Traits>
-    static const _CharT*
+    inline const _CharT*
     _S_range_end(const basic_string_view<_CharT, _Traits>& __str)
     { return __str.data() + __str.size(); }
 
diff --git a/libstdc++-v3/include/experimental/bits/fs_path.h b/libstdc++-v3/include/experimental/bits/fs_path.h
index d7234c08a00..69b823a3466 100644
--- a/libstdc++-v3/include/experimental/bits/fs_path.h
+++ b/libstdc++-v3/include/experimental/bits/fs_path.h
@@ -137,33 +137,33 @@ namespace __detail
 		     path>::type;
 
   template<typename _Source>
-    static _Source
+    inline _Source
     _S_range_begin(_Source __begin) { return __begin; }
 
   struct __null_terminated { };
 
   template<typename _Source>
-    static __null_terminated
+    inline __null_terminated
     _S_range_end(_Source) { return {}; }
 
   template<typename _CharT, typename _Traits, typename _Alloc>
-    static const _CharT*
+    inline const _CharT*
     _S_range_begin(const basic_string<_CharT, _Traits, _Alloc>& __str)
     { return __str.data(); }
 
   template<typename _CharT, typename _Traits, typename _Alloc>
-    static const _CharT*
+    inline const _CharT*
     _S_range_end(const basic_string<_CharT, _Traits, _Alloc>& __str)
     { return __str.data() + __str.size(); }
 
 #if __cplusplus >= 201402L
   template<typename _CharT, typename _Traits>
-    static const _CharT*
+    inline const _CharT*
     _S_range_begin(const basic_string_view<_CharT, _Traits>& __str)
     { return __str.data(); }
 
   template<typename _CharT, typename _Traits>
-    static const _CharT*
+    inline const _CharT*
     _S_range_end(const basic_string_view<_CharT, _Traits>& __str)
     { return __str.data() + __str.size(); }
 #endif