Enables and disables Virtual Function Elimination (VFE) in C++.
VFE enables unused virtual functions to be removed from code. When VFE is enabled,
compiler places the information in special sections with the prefix
.arm_vfe_. These sections are ignored by linkers that are not VFE-aware,
because they are not referenced by the rest of the code. Therefore, they do not increase
size of the executable. However, they increase the size of the object files.
This option is effective only if the source language is C++.
The default is
--vfe, except for the case where legacy object files
compiled with a pre-RVCT v2.1 compiler do not contain VFE information.