Re: [PATCH 0/3] build system: section garbage collection for vmlinux

Daniel Walker
2007-09-05T16:41:54Z

On Wed, 2007-09-05 at 14:43 +0100, Denys Vlasenko wrote:
> Build system: section garbage collection for vmlinux
>
>
> Newer gcc and binutils can do dead code and data removal
> at link time. It is achieved using combination of
> -ffunction-sections -fdata-sections options for gcc and
> --gc-sections for ld.
>
> Theory of operation:
>
> Option -ffunction-sections instructs gcc to place each function
> (including static ones) in it's own section named .text.function_name
> instead of placing all functions in one big .text section.
>
> At link time, ld normally coalesce all such sections into one
> output section .text again. It is achieved by having *(.text.*) spec
> along with *(.text) spec in built-in linker scripts.

You version doesn't work with CONFIG_MODULES right?

Also, why do you need this patch,

[PATCH 1/3] build system: section garbage collection for vmlinux

Daniel