Re: checksum files not ^C safe

[Geoffrey Keating]

On 14/09/2005, at 5:32 PM, Mike Stump wrote:

These types of rules are not ^C safe:

cc1-checksum.c : cc1-dummy$(exeext) build/genchecksum$(build_exeext)
        build/genchecksum$(build_exeext) cc1-dummy$(exeext) > $@

It is a general property that builds are ^C safe, the above changes retard that feature. If you output to a temp file, and then mv them to the final file, they will be (I think) safe.

From the 'make' documentation, node 'Interrupts':

   If `make' gets a fatal signal while a command is executing, it may

done if the target file's last-modification time has changed since
`make' first checked it.

delete the target file that the command was supposed to update. This is

So, I think this is safe. The file will be deleted and then re-built next time you run 'make'.

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