5 files changed, 7 insertions, 9 deletions
diff --git a/contrib/llvm-project/libcxx/include/__config b/contrib/llvm-project/libcxx/include/__config
index 71624a773d86..ce4cece198b1 100644
--- a/contrib/llvm-project/libcxx/include/__config
+++ b/contrib/llvm-project/libcxx/include/__config
@@ -1140,11 +1140,6 @@ __sanitizer_verify_double_ended_contiguous_container(const void*, const void*, c
 #    define _LIBCPP_HAS_TRIVIAL_CONDVAR_DESTRUCTION
 #  endif
 
-// Some systems do not provide gets() in their C library, for security reasons.
-#  if defined(_LIBCPP_MSVCRT) || (defined(__FreeBSD_version) && __FreeBSD_version >= 1300043) || defined(__OpenBSD__)
-#    define _LIBCPP_C_HAS_NO_GETS
-#  endif
-
 #  if defined(__BIONIC__) || defined(__NuttX__) || defined(__Fuchsia__) || defined(__wasi__) ||                        \
       defined(_LIBCPP_HAS_MUSL_LIBC) || defined(__OpenBSD__)
 #    define _LIBCPP_PROVIDES_DEFAULT_RUNE_TABLE
diff --git a/contrib/llvm-project/libcxx/include/__memory/shared_ptr.h b/contrib/llvm-project/libcxx/include/__memory/shared_ptr.h
index 9aa938b22031..9a73d439306d 100644
--- a/contrib/llvm-project/libcxx/include/__memory/shared_ptr.h
+++ b/contrib/llvm-project/libcxx/include/__memory/shared_ptr.h
@@ -1166,12 +1166,12 @@ inline _LIBCPP_HIDE_FROM_ABI bool operator!=(nullptr_t, const shared_ptr<_Tp>& _
 
 template <class _Tp>
 inline _LIBCPP_HIDE_FROM_ABI bool operator<(const shared_ptr<_Tp>& __x, nullptr_t) _NOEXCEPT {
-  return less<_Tp*>()(__x.get(), nullptr);
+  return less<typename shared_ptr<_Tp>::element_type*>()(__x.get(), nullptr);
 }
 
 template <class _Tp>
 inline _LIBCPP_HIDE_FROM_ABI bool operator<(nullptr_t, const shared_ptr<_Tp>& __x) _NOEXCEPT {
-  return less<_Tp*>()(nullptr, __x.get());
+  return less<typename shared_ptr<_Tp>::element_type*>()(nullptr, __x.get());
 }
 
 template <class _Tp>
diff --git a/contrib/llvm-project/libcxx/include/cstdio b/contrib/llvm-project/libcxx/include/cstdio
index b1b0ff8d3503..0a867cec1a38 100644
--- a/contrib/llvm-project/libcxx/include/cstdio
+++ b/contrib/llvm-project/libcxx/include/cstdio
@@ -159,7 +159,7 @@ using ::tmpfile _LIBCPP_USING_IF_EXISTS;
 using ::tmpnam _LIBCPP_USING_IF_EXISTS;
 
 using ::getchar _LIBCPP_USING_IF_EXISTS;
-#if _LIBCPP_STD_VER <= 11 && !defined(_LIBCPP_C_HAS_NO_GETS)
+#if _LIBCPP_STD_VER <= 11
 using ::gets _LIBCPP_USING_IF_EXISTS;
 #endif
 using ::scanf _LIBCPP_USING_IF_EXISTS;
diff --git a/contrib/llvm-project/libcxx/include/regex b/contrib/llvm-project/libcxx/include/regex
index b575a267583b..0761d9de54a9 100644
--- a/contrib/llvm-project/libcxx/include/regex
+++ b/contrib/llvm-project/libcxx/include/regex
@@ -1889,6 +1889,9 @@ void __r_anchor_multiline<_CharT>::__exec(__state& __s) const {
   if (__s.__current_ == __s.__last_ && !(__s.__flags_ & regex_constants::match_not_eol)) {
     __s.__do_   = __state::__accept_but_not_consume;
     __s.__node_ = this->first();
+  } else if (__s.__current_ == __s.__first_ && !(__s.__flags_ & regex_constants::match_not_eol)) {
+    __s.__do_   = __state::__accept_but_not_consume;
+    __s.__node_ = this->first();
   } else if (__multiline_ && std::__is_eol(*__s.__current_)) {
     __s.__do_   = __state::__accept_but_not_consume;
     __s.__node_ = this->first();
diff --git a/contrib/llvm-project/libcxx/include/tuple b/contrib/llvm-project/libcxx/include/tuple
index aa22c320b1ec..0e5f0b4831b4 100644
--- a/contrib/llvm-project/libcxx/include/tuple
+++ b/contrib/llvm-project/libcxx/include/tuple
@@ -141,7 +141,7 @@ template <class... Tuples> tuple<CTypes...> tuple_cat(Tuples&&... tpls); // cons
 
 // [tuple.apply], calling a function with a tuple of arguments:
 template <class F, class Tuple>
-  constexpr decltype(auto) apply(F&& f, Tuple&& t); // C++17
+  constexpr decltype(auto) apply(F&& f, Tuple&& t) noexcept(see below);  // C++17 noexcept since C++23
 template <class T, class Tuple>
   constexpr T make_from_tuple(Tuple&& t); // C++17