re https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=258108#c65

databases rubygem-mysql

===>   Generating temporary packing list
(cd /wrkdirs/usr/ports/databases/rubygem-mysql/work/mysql-2.9.1; /usr/bin/env RB_USER_INSTALL=yes LANG=en_US.UTF-8 LC_ALL=en_US.UTF-8 /usr/local/bin/gem27 install -l --no-update-sources --install-dir /wrkdirs/usr/ports/databases/rubygem-mysql/work/stage/usr/local/lib/ruby/gems/2.7 --ignore-dependencies --bindir=/wrkdirs/usr/ports/databases/rubygem-mysql/work/stage/usr/local/bin --no-document mysql-2.9.1.gem -- )
Building native extensions. This could take a while...
ERROR:  Error installing mysql-2.9.1.gem:
	ERROR: Failed to build gem native extension.

    current directory: /wrkdirs/usr/ports/databases/rubygem-mysql/work/stage/usr/local/lib/ruby/gems/2.7/gems/mysql-2.9.1/ext/mysql_api
/usr/local/bin/ruby27 -I /usr/local/lib/ruby/site_ruby/2.7 -r ./siteconf20220126-30073-1frxqsf.rb extconf.rb
checking for mysql_ssl_set()... yes
checking for rb_str_set_len()... yes
checking for rb_thread_start_timer()... no
checking for mysql.h... yes
creating Makefile

current directory: /wrkdirs/usr/ports/databases/rubygem-mysql/work/stage/usr/local/lib/ruby/gems/2.7/gems/mysql-2.9.1/ext/mysql_api
make DESTDIR\= clean

current directory: /wrkdirs/usr/ports/databases/rubygem-mysql/work/stage/usr/local/lib/ruby/gems/2.7/gems/mysql-2.9.1/ext/mysql_api
make DESTDIR\=
compiling mysql.c
mysql.c:79:2: error: unknown type name 'my_bool'
        my_bool *is_null;
        ^
mysql.c:367:5: error: use of undeclared identifier 'my_bool'
    my_bool b;
    ^
mysql.c:397:10: error: use of undeclared identifier 'MYSQL_SET_CLIENT_IP'; did you mean 'MYSQL_SET_CHARSET_DIR'?
    case MYSQL_SET_CLIENT_IP:
         ^~~~~~~~~~~~~~~~~~~
         MYSQL_SET_CHARSET_DIR
/usr/local/include/mysql/mysql.h:176:3: note: 'MYSQL_SET_CHARSET_DIR' declared here
  MYSQL_SET_CHARSET_DIR,
  ^
mysql.c:404:10: error: use of undeclared identifier 'MYSQL_SECURE_AUTH'; did you mean 'MYSQL_DEFAULT_AUTH'?
    case MYSQL_SECURE_AUTH:
         ^~~~~~~~~~~~~~~~~
         MYSQL_DEFAULT_AUTH
/usr/local/include/mysql/mysql.h:187:3: note: 'MYSQL_DEFAULT_AUTH' declared here
  MYSQL_DEFAULT_AUTH,
  ^
mysql.c:406:6: error: use of undeclared identifier 'b'
            b = 1;
            ^
mysql.c:408:6: error: use of undeclared identifier 'b'
            b = 0;
            ^
mysql.c:409:14: error: use of undeclared identifier 'b'
        v = (char*)&b;
                    ^
mysql.c:397:10: error: duplicate case value 'MYSQL_SET_CHARSET_DIR'
    case MYSQL_SET_CLIENT_IP:
         ^
mysql.c:390:10: note: previous case defined here
    case MYSQL_SET_CHARSET_DIR:
         ^
mysql.c:884:5: error: use of undeclared identifier 'my_bool'
    my_bool true = 1;
    ^
mysql.c:889:61: error: cannot take the address of an rvalue of type 'int'
    if (mysql_stmt_attr_set(s, STMT_ATTR_UPDATE_MAX_LENGTH, &true))
                                                            ^~~~~
mysql.c:2063:52: error: use of undeclared identifier 'MYSQL_SECURE_AUTH'; did you mean 'MYSQL_DEFAULT_AUTH'?
    rb_define_const(cMysql, "SECURE_AUTH", INT2NUM(MYSQL_SECURE_AUTH));
                                                   ^~~~~~~~~~~~~~~~~
                                                   MYSQL_DEFAULT_AUTH
/usr/local/include/ruby-2.7/ruby/ruby.h:1609:31: note: expanded from macro 'INT2NUM'
#define INT2NUM(x) RB_INT2NUM(x)
                              ^
/usr/local/include/ruby-2.7/ruby/ruby.h:1586:41: note: expanded from macro 'RB_INT2NUM'
# define RB_INT2NUM(v) RB_INT2FIX((int)(v))
                                        ^
/usr/local/include/ruby-2.7/ruby/ruby.h:262:33: note: expanded from macro 'RB_INT2FIX'
#define RB_INT2FIX(i) (((VALUE)(i))<<1 | RUBY_FIXNUM_FLAG)
                                ^
/usr/local/include/mysql/mysql.h:187:3: note: 'MYSQL_DEFAULT_AUTH' declared here
  MYSQL_DEFAULT_AUTH,
  ^
mysql.c:2064:61: error: use of undeclared identifier 'MYSQL_OPT_GUESS_CONNECTION'; did you mean 'MYSQL_OPT_RECONNECT'?
    rb_define_const(cMysql, "OPT_GUESS_CONNECTION", INT2NUM(MYSQL_OPT_GUESS_CONNECTION));
                                                            ^~~~~~~~~~~~~~~~~~~~~~~~~~
                                                            MYSQL_OPT_RECONNECT
/usr/local/include/ruby-2.7/ruby/ruby.h:1609:31: note: expanded from macro 'INT2NUM'
#define INT2NUM(x) RB_INT2NUM(x)
                              ^
/usr/local/include/ruby-2.7/ruby/ruby.h:1586:41: note: expanded from macro 'RB_INT2NUM'
# define RB_INT2NUM(v) RB_INT2FIX((int)(v))
                                        ^
/usr/local/include/ruby-2.7/ruby/ruby.h:262:33: note: expanded from macro 'RB_INT2FIX'
#define RB_INT2FIX(i) (((VALUE)(i))<<1 | RUBY_FIXNUM_FLAG)
                                ^
/usr/local/include/mysql/mysql.h:185:3: note: 'MYSQL_OPT_RECONNECT' declared here
  MYSQL_OPT_RECONNECT,
  ^
mysql.c:2065:68: error: use of undeclared identifier 'MYSQL_OPT_USE_EMBEDDED_CONNECTION'
    rb_define_const(cMysql, "OPT_USE_EMBEDDED_CONNECTION", INT2NUM(MYSQL_OPT_USE_EMBEDDED_CONNECTION));
                                                                   ^
mysql.c:2066:66: error: use of undeclared identifier 'MYSQL_OPT_USE_REMOTE_CONNECTION'
    rb_define_const(cMysql, "OPT_USE_REMOTE_CONNECTION", INT2NUM(MYSQL_OPT_USE_REMOTE_CONNECTION));
                                                                 ^
mysql.c:2067:54: error: use of undeclared identifier 'MYSQL_SET_CLIENT_IP'; did you mean 'MYSQL_SET_CHARSET_DIR'?
    rb_define_const(cMysql, "SET_CLIENT_IP", INT2NUM(MYSQL_SET_CLIENT_IP));
                                                     ^~~~~~~~~~~~~~~~~~~
                                                     MYSQL_SET_CHARSET_DIR
/usr/local/include/ruby-2.7/ruby/ruby.h:1609:31: note: expanded from macro 'INT2NUM'
#define INT2NUM(x) RB_INT2NUM(x)
                              ^
/usr/local/include/ruby-2.7/ruby/ruby.h:1586:41: note: expanded from macro 'RB_INT2NUM'
# define RB_INT2NUM(v) RB_INT2FIX((int)(v))
                                        ^
/usr/local/include/ruby-2.7/ruby/ruby.h:262:33: note: expanded from macro 'RB_INT2FIX'
#define RB_INT2FIX(i) (((VALUE)(i))<<1 | RUBY_FIXNUM_FLAG)
                                ^
/usr/local/include/mysql/mysql.h:176:3: note: 'MYSQL_SET_CHARSET_DIR' declared here
  MYSQL_SET_CHARSET_DIR,
  ^
In file included from mysql.c:2301:
./error_const.h:2723:27: error: use of undeclared identifier 'ER_XPLUGIN_IP'
    rb_define_mysql_const(ER_XPLUGIN_IP);
                          ^
16 errors generated.
*** Error code 1

Stop.
make[1]: stopped in /wrkdirs/usr/ports/databases/rubygem-mysql/work/stage/usr/local/lib/ruby/gems/2.7/gems/mysql-2.9.1/ext/mysql_api

make failed, exit code 1

Gem files will remain installed in /wrkdirs/usr/ports/databases/rubygem-mysql/work/stage/usr/local/lib/ruby/gems/2.7/gems/mysql-2.9.1 for inspection.
Results logged to /wrkdirs/usr/ports/databases/rubygem-mysql/work/stage/usr/local/lib/ruby/gems/2.7/extensions/amd64-freebsd-13/2.7/mysql-2.9.1/gem_make.out
*** Error code 1

Stop.
make: stopped in /usr/ports/databases/rubygem-mysql
=>> Cleaning up wrkdir
===>  Cleaning for rubygem-mysql-2.9.1
build of databases/rubygem-mysql | rubygem-mysql-2.9.1 ended at Wed Jan 26 16:20:31 UTC 2022
build time: 00:03:20
!!! build failure encountered !!!