diff -ru origsrc/libcxx-20.1.2.src/src/call_once.cpp src/libcxx-20.1.2.src/src/call_once.cpp
--- origsrc/libcxx-20.1.2.src/src/call_once.cpp	2025-04-02 08:44:12.000000000 +0900
+++ src/libcxx-20.1.2.src/src/call_once.cpp	2025-04-19 22:06:01.378380400 +0900
@@ -24,8 +24,8 @@
 // keep in sync with:  7741191.
 
 #if _LIBCPP_HAS_THREADS
-static constinit __libcpp_mutex_t mut  = _LIBCPP_MUTEX_INITIALIZER;
-static constinit __libcpp_condvar_t cv = _LIBCPP_CONDVAR_INITIALIZER;
+static __libcpp_mutex_t mut  = _LIBCPP_MUTEX_INITIALIZER;
+static __libcpp_condvar_t cv = _LIBCPP_CONDVAR_INITIALIZER;
 #endif
 
 void __call_once(volatile once_flag::_State_type& flag, void* arg, void (*func)(void*)) {
diff -ru origsrc/libcxx-20.1.2.src/src/memory.cpp src/libcxx-20.1.2.src/src/memory.cpp
--- origsrc/libcxx-20.1.2.src/src/memory.cpp	2025-04-02 08:44:12.000000000 +0900
+++ src/libcxx-20.1.2.src/src/memory.cpp	2025-04-19 22:05:38.683014400 +0900
@@ -99,7 +99,7 @@
 #if _LIBCPP_HAS_THREADS
 
 static constexpr std::size_t __sp_mut_count                = 32;
-static constinit __libcpp_mutex_t mut_back[__sp_mut_count] = {
+static __libcpp_mutex_t mut_back[__sp_mut_count] = {
     _LIBCPP_MUTEX_INITIALIZER, _LIBCPP_MUTEX_INITIALIZER, _LIBCPP_MUTEX_INITIALIZER, _LIBCPP_MUTEX_INITIALIZER,
     _LIBCPP_MUTEX_INITIALIZER, _LIBCPP_MUTEX_INITIALIZER, _LIBCPP_MUTEX_INITIALIZER, _LIBCPP_MUTEX_INITIALIZER,
     _LIBCPP_MUTEX_INITIALIZER, _LIBCPP_MUTEX_INITIALIZER, _LIBCPP_MUTEX_INITIALIZER, _LIBCPP_MUTEX_INITIALIZER,
diff -ru origsrc/libcxx-20.1.2.src/src/random_shuffle.cpp src/libcxx-20.1.2.src/src/random_shuffle.cpp
--- origsrc/libcxx-20.1.2.src/src/random_shuffle.cpp	2025-04-02 08:44:12.000000000 +0900
+++ src/libcxx-20.1.2.src/src/random_shuffle.cpp	2025-04-19 22:04:21.632563400 +0900
@@ -19,7 +19,7 @@
 _LIBCPP_BEGIN_NAMESPACE_STD
 
 #if _LIBCPP_HAS_THREADS
-static constinit __libcpp_mutex_t __rs_mut = _LIBCPP_MUTEX_INITIALIZER;
+static __libcpp_mutex_t __rs_mut = _LIBCPP_MUTEX_INITIALIZER;
 #endif
 unsigned __rs_default::__c_ = 0;
 
diff -ru origsrc/libcxx-20.1.2.src/src/regex.cpp src/libcxx-20.1.2.src/src/regex.cpp
--- origsrc/libcxx-20.1.2.src/src/regex.cpp	2025-04-02 08:44:12.000000000 +0900
+++ src/libcxx-20.1.2.src/src/regex.cpp	2025-04-19 22:05:09.641475100 +0900
@@ -308,13 +308,13 @@
 const classnames ClassNames[] = {
     {"alnum", ctype_base::alnum},
     {"alpha", ctype_base::alpha},
-    {"blank", ctype_base::blank},
+    {"blank", ctype_base::blank + 256},
     {"cntrl", ctype_base::cntrl},
     {"d", ctype_base::digit},
     {"digit", ctype_base::digit},
     {"graph", ctype_base::graph},
     {"lower", ctype_base::lower},
-    {"print", ctype_base::print},
+    {"print", ctype_base::print + 256},
     {"punct", ctype_base::punct},
     {"s", ctype_base::space},
     {"space", ctype_base::space},