Correct noexcept mismatch in declarations.

2017-12-05  Jason Merrill  <jason@redhat.com>
	    Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/fs_fwd.h (copy, copy_file): Remove noexcept.
	(permissions): Add noexcept.
	* include/bits/fs_ops.h (permissions): Add noexcept.
	* libsupc++/eh_throw.cc (__cxa_init_primary_exception): Add
	_GLIBCXX_NOTHROW.

Co-Authored-By: Jonathan Wakely <jwakely@redhat.com>

From-SVN: r255425

libstdc++-v3/ChangeLog

+2017-12-05  Jason Merrill  <jason@redhat.com>
+	    Jonathan Wakely  <jwakely@redhat.com>
+
+	* include/bits/fs_fwd.h (copy, copy_file): Remove noexcept.
+	(permissions): Add noexcept.
+	* include/bits/fs_ops.h (permissions): Add noexcept.
+	* libsupc++/eh_throw.cc (__cxa_init_primary_exception): Add
+	_GLIBCXX_NOTHROW.
+
 2017-12-04  Jonathan Wakely  <jwakely@redhat.com>
 
 	* include/bits/regex_compiler.tcc: Use C-style comment to work around

libstdc++-v3/include/bits/fs_fwd.h

@@ -300,11 +300,11 @@ _GLIBCXX_END_NAMESPACE_CXX11
 
   void copy(const path& __from, const path& __to, copy_options __options);
   void copy(const path& __from, const path& __to, copy_options __options,
-	    error_code&) noexcept;
+	    error_code&);
 
   bool copy_file(const path& __from, const path& __to, copy_options __option);
   bool copy_file(const path& __from, const path& __to, copy_options __option,
-		 error_code&) noexcept;
+		 error_code&);
 
   path current_path();
 
@@ -319,7 +319,7 @@ _GLIBCXX_END_NAMESPACE_CXX11
   file_time_type last_write_time(const path&);
   file_time_type last_write_time(const path&, error_code&) noexcept;
 
-  void permissions(const path&, perms, perm_options, error_code&);
+  void permissions(const path&, perms, perm_options, error_code&) noexcept;
 
   path proximate(const path& __p, const path& __base, error_code& __ec);
   path proximate(const path& __p, const path& __base, error_code& __ec);

libstdc++-v3/include/bits/fs_ops.h

@@ -253,7 +253,7 @@ namespace filesystem
 
   void
   permissions(const path& __p, perms __prms, perm_options __opts,
-	      error_code& __ec);
+	      error_code& __ec) noexcept;
 
   inline path proximate(const path& __p, error_code& __ec)
   { return proximate(__p, current_path(), __ec); }

libstdc++-v3/libsupc++/eh_throw.cc

@@ -53,8 +53,10 @@ __gxx_exception_cleanup (_Unwind_Reason_Code code, _Unwind_Exception *exc)
 }
 
 extern "C" __cxa_refcounted_exception*
-__cxxabiv1::__cxa_init_primary_exception(void *obj, std::type_info *tinfo,
-                                         void (_GLIBCXX_CDTOR_CALLABI *dest) (void *))
+__cxxabiv1::
+__cxa_init_primary_exception(void *obj, std::type_info *tinfo,
+			     void (_GLIBCXX_CDTOR_CALLABI *dest) (void *))
+_GLIBCXX_NOTHROW
 {
   __cxa_refcounted_exception *header
     = __get_refcounted_exception_header_from_obj (obj);