Re: [PATCH V3]PR other/70268: map one directory name (old) to another (new) in __FILE__

[Hongxu Jia]

On 03/18/2016 04:05 PM, Hongxu Jia wrote:

Please explain why you first alloca() and then strdup the result instead of XNEWVEC

BTW, I just refer the implement of -fdebug-prefix-map:

In gcc/final.c
----------------
const char *
remap_debug_filename (const char *filename)
----------------

//Hongxu

1. alloca - allocate memory that is automatically freed when the
    function remap_file_filename returns

2. XNEW - allocate memory for struct file_prefix_map

3. xstrdup - duplicate a string

//Hongxu

Thanks,