Development Reference Guides

Contents

ffunction-sections, Gy

Places each function in its own COMDAT section.

Syntax

Linux:
-ffunction-sections
Windows:
/Gy
Arguments
None
Default
OFF
The compiler does not separate functions into COMDATs.
Description
This option places each function in its own COMDAT section.
When using this compiler option, you can add the linker option
-Wl,--gc-sections
(LInux) or
/link /OPT:REF
(Windows), which will remove all unused code.
When you put each function in its own section, it enables the linker to reorder the sections for other possible optimization.
IDE Equivalent
Visual Studio:
Code Generation > Enable Function-Level Linking
Eclipse:
None
Alternate Options
None

Product and Performance Information

1

Performance varies by use, configuration and other factors. Learn more at www.Intel.com/PerformanceIndex.