gdb questions

• What's the difference between exit and _exit both in libc.so?
• Why one needs two brackets to use macros in C?
• How to make yum also install debug symbols?
• Where can I find source code of ldconfig? [closed]
• How to call assembly in gdb?
• How to update fields that is the aggregate result of another table in MySQL?
• What's the difference between retail symbols and checked symbols?
• How does strace work?
• Is it legal to have duplicate enum values in C?
• How to change the path of a mapped drive in win7?

gdb answers