GDB 7.3a 发布，程序调试工具

GDB（GNU symbolic debugger）简单地说就是一个调试工具。它是一个受通用公共许可证即GPL保护的自由软件。

Changes:

1. GDB now understands thread names.
2. The commands "thread name" (to assign a name) and "thread find [REGEXP]" (matching name, target ID, or extra information) were added.
3. Python scripting support was vastly enhanced.
4. In C++ support, exception handling was improved, and template parameters are now put in scope when debugging in an instantiation.
5. Thread debugging of core dumps on GNU/Linux is now possible.
6. Initial support for the OpenCL C language was introduced.
7. Many other enhancements were made