RealView Compilation Tools Compiler Reference Guide - ARM ...

Compiler Command-line Options
When certain non-portable but widely supported constant initializers such as the cast of
an address to an integral type are used, --extended_initializers causes the compiler to
produce the same general warning concerning constant initializers that it normally
produces in non-strict mode, rather than specific errors stating that the expression must
have a constant value or have arithmetic type.
Default
The default is --no_extended_initializers when compiling with --strict or
--strict_warnings.
The default is --extended_initializers when compiling in non-strict mode.
See also
• --[no_]strict on page 2-84
• --strict_warnings on page 2-85
• Constant expressions on page 3-10.
2.1.50 --feedback=filename
This option enables the efficient elimination of unused functions.
Syntax
--feedback=filename
Where:
filename
is the feedback file created by a previous execution of the ARM linker.
Usage
You can perform multiple compilations using the same feedback file, or specify
multiple source files in a single compilation. The feedback file identifies the source file
that contains the unused functions in a comment, and is not used by the compiler. The
compiler places each unused function identified in the feedback file into its own ELF
section in the corresponding object file.
The feedback file contains information about a previous build. Because of this:
• The feedback file might be out of date. That is, a function previously identified as
being unused might be used in the current source. The linker removes the code for
an unused function only if it is not used in the current source.
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