技巧
在向 GDB 官方或社区报告 bug、查阅文档确认当前版本是否支持某个特性时，都需要先弄清楚自己所使用的 GDB 版本。使用 gdb 时，如果想查看 gdb 版本信息，可以使用 show version 命令：
(gdb) show version
GNU gdb (GDB) 7.7.1
Copyright (C) 2014 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-pc-solaris2.10".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
<http://www.gnu.org/software/gdb/documentation/>.
For help, type "help".
Type "apropos word" to search for commands related to "word".参见 gdb手册。
