This patch makes the lto-plugin follow the same approach
to save-temps as collect2.
-save-temps causes the temp file to be named meaningfully,
and for the relevant input files to be saved in CWD.
-v, —version causes the save actions to be output to stderr.
one can get this to happen by just putting -save-temps, -v on
the regular link line or (for compatibility with the way the
-debug flag works) by appending -plugin-opt=-save-temps, etc.
lto-plugin/
2019-05-15 Iain Sandoe <iain@sandoe.co.uk>
* lto-plugin.c (exec_lto_wrapper): Make the wrapper
arguments filename more user-friendly.
(file_exists, maybe_unlink): New.
(cleanup_handler): Use maybe unlink to handle the
case when temps should be saved.
(process_option): Look for -v, —-version, -save-temps.
(onload): Record the linker output file name.
Check for -v, —-version, -save-temps in the GCC collect
options environment.
From-SVN: r271202
