If that doesn't work, you can always try the sheer brute force method: specify the necessary compiler flags as part of your CC environment variable, or as part of the CFLAGS environment variable.
如果这样仍不行，您还可以尝试使用完全强制的方法：指定需要的编译器标记为您的 CC 环境变量或者是 CFLAGS 环境变量的一部分。
To verify that you have the proper environment variable setup, you can try to connect to the database DIRDB01 as shown earlier; it should work from root context now.
为验证您有合理的环境变量设置，您可以尝试像之前一样连接到数据库dirdb01；现在它应当可以通过root上下文工作了。
The GNU glibc library has routines that work to counter this, but other libraries and any routines that walk the environment variable list can get into trouble in a hurry.
GNU glibc库对此有防范的例程，但是使用环境变量的其他库和任何例程可能很快陷入困境。
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