Re: [PATCH] fix -fdebug-prefix-map without gas .file support

[Jason Merrill <jason@redhat.com>]

On 2/21/20 5:02 AM, Richard Biener wrote:
> This applies file mapping when emitting the directory table
> directly instead of using the assemblers .file directive where
> we already correctly apply the map.  Notably the non-assembler
> path is used for the early debug emission for LTO.
> 
> Bootstrapped and tested on x86_64-unknown-linux-gnu.
> 
> OK for trunk?

OK.

> Thanks,
> Richard.
> 
> 2020-02-21  Mark Williams  <mwilliams@fb.com>
> 
> 	* dwarf2out.c (file_name_acquire): Call remap_debug_filename.
> ---
>   gcc/dwarf2out.c | 3 ++-
>   1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/gcc/dwarf2out.c b/gcc/dwarf2out.c
> index 577be3d52d3..ba9da0f2cc2 100644
> --- a/gcc/dwarf2out.c
> +++ b/gcc/dwarf2out.c
> @@ -12205,8 +12205,9 @@ file_name_acquire (dwarf_file_data **slot, file_name_acquire_data *fnad)
>   
>     fi = fnad->files + fnad->used_files++;
>   
> +  f = remap_debug_filename (d->filename);
> +
>     /* Skip all leading "./".  */
> -  f = d->filename;
>     while (f[0] == '.' && IS_DIR_SEPARATOR (f[1]))
>       f += 2;
>   
>