构建遇到的问题如下：

"_res_9_dn_expand", referenced from:
      _php_parserr in dns.o
      _php_parserr in dns.o
      _php_parserr in dns.o
      _php_parserr in dns.o
      _php_parserr in dns.o
      _php_parserr in dns.o
      _zif_dns_get_mx in dns.o
      ...
  "_res_9_dn_skipname", referenced from:
      _zif_dns_get_record in dns.o
      _zif_dns_get_mx in dns.o
      _zif_dns_get_mx in dns.o
  "_res_9_init", referenced from:
      _zif_dns_check_record in dns.o
      _zif_dns_get_record in dns.o
      _zif_dns_get_mx in dns.o
  "_res_9_search", referenced from:
      _zif_dns_check_record in dns.o
      _zif_dns_get_record in dns.o
      _zif_dns_get_mx in dns.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

解决方法：

1. 编辑 /opt/local/var/macports/sources/rsync.macports.org/macports/release/tarballs/ports/lang/php/Portfile；
2. 在大概 350 行前后找到 if {[vercmp ${branch} < 8.0]}，这是判定 PHP 版本是否小于 8.0
3. 在判定内加上 configure.args-append EXTRA_LIBS=-lresolv
4. 保存后执行 sudo port install php74 即可

修改的位置：

php74-fpm 同样需要修改该文件，在 770 行左右增加 configure.args-append EXTRA_LIBS=-lresolv，### FPM SAPI ### 下方

如图所示：