[Mesa-dev] [PATCH v2] nv30: Add unused attribute to function nv40_fp_bra.

[Matt Turner]

On Fri, Mar 6, 2015 at 11:43 PM, Vinson Lee <vlee at freedesktop.org> wrote:
> Silences GCC unused-function warning.
>
> nv30/nvfx_fragprog.c:333:1: warning: ‘nv40_fp_bra’ defined but not used [-Wunused-function]
>  nv40_fp_bra(struct nvfx_fpc *fpc, unsigned target)
>  ^
>
> Signed-off-by: Vinson Lee <vlee at freedesktop.org>
> ---
>  src/gallium/drivers/nouveau/nv30/nvfx_fragprog.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/src/gallium/drivers/nouveau/nv30/nvfx_fragprog.c b/src/gallium/drivers/nouveau/nv30/nvfx_fragprog.c
> index 6600997..abd51c8 100644
> --- a/src/gallium/drivers/nouveau/nv30/nvfx_fragprog.c
> +++ b/src/gallium/drivers/nouveau/nv30/nvfx_fragprog.c
> @@ -329,7 +329,7 @@ nv40_fp_rep(struct nvfx_fpc *fpc, unsigned count, unsigned target)
>  }
>
>  /* warning: this only works forward, and probably only if not inside any IF */
> -static void
> +static __attribute__((unused)) void

Doing this means gcc can't actually eliminate the function.

I think your only option, if we want to keep the code but still let
gcc eliminate the function, is to #if 0 it/comment it out.