gcc -save-temps emits incorrect debug info in 3.4 (breaks distcc bootstraps)

[Mark Mitchell]

Alexandre Oliva wrote:

>Per,
>
>Is there any reason why this bit, that made it to mainline, was
>missing in the 3.4 branch?  Without it, the initial .file directive
>refers to the .i file instead of the original .c file.
>
>I'm bootstrapping and regression-testing this patch in 3.4.  Mark, if
>it passes without regressions, is this ok for the branch?
>  
>
OK.

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Mark Mitchell
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