8.4.35 Zero Initialization (--zero_init Option)

The C and C++ standards require that global and static variables that are not explicitly initialized must be set to 0 before program execution. The C/C++ compiler supports preinitialization of uninitialized variables by default. To turn this off, specify the linker option --zero_init=off.

The syntax for the --zero_init option is:

--zero_init[={on|off}]

NOTE

Disabling Zero Initialization Not Recommended

In general, this option it is not recommended. If you turn off zero initialization, automatic initialization of uninitialized global and static objects to zero will not occur. You are then expected to initialize these variables to zero in some other manner.