ftrapuv, Qtrapuv

Initializes stack local variables to an unusual value to aid error detection.

IDE Equivalent

Windows: C/C++ > Code Generation > Initialize Local Variables to NaN

Linux: Code Generation > Initialize Local Variables to NaN

Mac OS: Code Generation > Initialize Local Variables to NaN

Architectures

IA-32 architecture, Intel® 64 architecture, IA-64 architecture

Syntax

Linux and Mac OS:	-ftrapuv
Windows:	/Qtrapuv

Arguments

None

Default

OFF	The compiler does not initialize local variables.

Description

This option initializes stack local variables to an unusual value to aid error detection. Normally, these local variables should be initialized in the application.

The option sets any uninitialized local variables that are allocated on the stack to a value that is typically interpreted as a very large integer or an invalid address. References to these variables are then likely to cause run-time errors that can help you detect coding errors.

This option sets option -g (Linux and Mac OS) and /Zi or /Z7 (Windows).

Alternate Options