Bitcoin depends BDB build fail on OpenBSD

gistfile1.txt

configure:6211: checking whether C++ supports the ISO C++ standard includes
configure:6231: clang++ -m64 -c -pipe -std=c++20 -O2   -I/home/thestack/bitcoin/depends/amd64-unknown-openbsd7.4/include -D_XOPEN_SOURCE=600  conftest.cpp >&5
In file included from conftest.cpp:10:
In file included from /usr/include/c++/v1/iostream:37:
In file included from /usr/include/c++/v1/ios:214:
In file included from /usr/include/c++/v1/__locale:37:
In file included from /usr/include/c++/v1/__support/openbsd/xlocale.h:13:
/usr/include/c++/v1/__support/xlocale/__strtonum_fallback.h:23:64: error: unknown type name 'locale_t'
                                                char **endptr, locale_t) {
                                                               ^
/usr/include/c++/v1/__support/xlocale/__strtonum_fallback.h:28:65: error: unknown type name 'locale_t'
                                                 char **endptr, locale_t) {
                                                                ^
/usr/include/c++/v1/__support/xlocale/__strtonum_fallback.h:33:71: error: unknown type name 'locale_t'
                                                       char **endptr, locale_t) {
                                                                      ^
/usr/include/c++/v1/__support/xlocale/__strtonum_fallback.h:38:54: error: unknown type name 'locale_t'
strtoll_l(const char *nptr, char **endptr, int base, locale_t) {
                                                     ^
/usr/include/c++/v1/__support/xlocale/__strtonum_fallback.h:43:55: error: unknown type name 'locale_t'
strtoull_l(const char *nptr, char **endptr, int base, locale_t) {
                                                      ^
/usr/include/c++/v1/__support/xlocale/__strtonum_fallback.h:48:60: error: unknown type name 'locale_t'
wcstoll_l(const wchar_t *nptr, wchar_t **endptr, int base, locale_t) {
                                                           ^
/usr/include/c++/v1/__support/xlocale/__strtonum_fallback.h:53:61: error: unknown type name 'locale_t'
wcstoull_l(const wchar_t *nptr, wchar_t **endptr, int base, locale_t) {
                                                            ^
/usr/include/c++/v1/__support/xlocale/__strtonum_fallback.h:58:74: error: unknown type name 'locale_t'
                                                       wchar_t **endptr, locale_t) {
                                                                         ^
In file included from conftest.cpp:10:
In file included from /usr/include/c++/v1/iostream:37:
In file included from /usr/include/c++/v1/ios:214:
/usr/include/c++/v1/__locale:59:25: error: unknown type name 'locale_t'; did you mean 'chrono::local_t'?
  __libcpp_locale_guard(locale_t& __loc) : __old_loc_(uselocale(__loc)) {}
                        ^
/usr/include/c++/v1/chrono:1618:8: note: 'chrono::local_t' declared here
struct local_t {};
       ^
In file included from conftest.cpp:10:
In file included from /usr/include/c++/v1/iostream:37:
In file included from /usr/include/c++/v1/ios:214:
/usr/include/c++/v1/__locale:67:3: error: unknown type name 'locale_t'; did you mean 'chrono::local_t'?
  locale_t __old_loc_;
  ^
/usr/include/c++/v1/chrono:1618:8: note: 'chrono::local_t' declared here
struct local_t {};
       ^
In file included from conftest.cpp:10:
In file included from /usr/include/c++/v1/iostream:37:
In file included from /usr/include/c++/v1/ios:214:
/usr/include/c++/v1/__locale:59:55: error: use of undeclared identifier 'uselocale'
  __libcpp_locale_guard(locale_t& __loc) : __old_loc_(uselocale(__loc)) {}
                                                      ^
/usr/include/c++/v1/__locale:63:9: error: value of type 'chrono::local_t' is not contextually convertible to 'bool'
    if (__old_loc_)
        ^~~~~~~~~~
/usr/include/c++/v1/__locale:64:7: error: use of undeclared identifier 'uselocale'
      uselocale(__old_loc_);
      ^
/usr/include/c++/v1/__locale:136:20: error: use of undeclared identifier 'LC_COLLATE_MASK'
        collate  = LC_COLLATE_MASK,
                   ^
/usr/include/c++/v1/__locale:137:20: error: use of undeclared identifier 'LC_CTYPE_MASK'
        ctype    = LC_CTYPE_MASK,
                   ^
/usr/include/c++/v1/__locale:138:20: error: use of undeclared identifier 'LC_MONETARY_MASK'
        monetary = LC_MONETARY_MASK,
                   ^
/usr/include/c++/v1/__locale:139:20: error: use of undeclared identifier 'LC_NUMERIC_MASK'
        numeric  = LC_NUMERIC_MASK,
                   ^
/usr/include/c++/v1/__locale:140:20: error: use of undeclared identifier 'LC_TIME_MASK'
        time     = LC_TIME_MASK,
                   ^
/usr/include/c++/v1/__locale:141:20: error: use of undeclared identifier 'LC_MESSAGES_MASK'
        messages = LC_MESSAGES_MASK,
                   ^
fatal error: too many errors emitted, stopping now [-ferror-limit=]
20 errors generated.
configure:6231: $? = 1
configure: failed program was:
| /* confdefs.h */
| #define PACKAGE_NAME "Berkeley DB"
| #define PACKAGE_TARNAME "db-4.8.30"
| #define PACKAGE_VERSION "4.8.30"
| #define PACKAGE_STRING "Berkeley DB 4.8.30"
| #define PACKAGE_BUGREPORT "Oracle Technology Network Berkeley DB forum"
| #define PACKAGE_URL ""
| #define HAVE_UPGRADE_SUPPORT 1
| /* end confdefs.h.  */
| #include <iostream>
| int
| main ()
| {
| std::ostream *o; return 0;
|   ;
|   return 0;
| }
configure:6243: result: no