I saw that files such as /tmp/ccxFKYeS.target.o kept accumulating. Not a high number,
but still several.

I turned out that when compiling an offloading program successfully, they were removed.
But when it failed, those remained. (Example: See PR.)

This patch fixes this by storing the file name earlier and process them during cleanup,
unless they have been taken care of before. (Usual way; as they are printf'ed to stdout,
I assume the caller takes care of the tmp files.)

OK for mainline?

Tobias


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