Possible endless loop in lto-wrapper

[Leandro Nini]

Hi,

in gcc-4.5 lto-wrapper may end up in an endless loop in case of error:

if for example a 'maybe_unlink_file' call from 'lto_wrapper_exit' fails it
calls 'fatal_perror' which in turn calls 'lto_wrapper_exit' again causing
an infinity of 

lto-wrapper: deleting LTRANS file /tmp/ccWjXUv8.lto.o: No such file or
directory

error messages on the console.

I've solved this by substituting 'maybe_unlink_file' with
'unlink_if_ordinary'
whithin the 'lto_wrapper_exit' function.
Not sure if this is the best fix but hope it helps.


Best Regards,
Leandro 
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