[CMake] Why is obj.dir/depend.make.tmp not renamed to obj.dir/depend.make?

[frodak]

Did cmake finish to completion when generating the Makefiles?

On Wed, Nov 7, 2018 at 11:46 AM Steffen Dettmer <steffen.dettmer at gmail.com>
wrote:

> Hi,
>
> One (of really many) build trees contains a file "depend.make.tmp" and
> ignores dependencies leading to broken (incremental) builds. There
> also is a "depend.make" file in the same directory saying "Empty
> dependencies file. This may be replaced when dependencies are built.",
> so I assume the tmp file should be rename to it. The timestamp of the
> tmp file is newer. I like to understand the cause and how to solve it.
> I did not find any makefile rule that should do the rename.
>
> The problem became visible in form of a SIGSEGV of a test application.
> Analysing this down to the "depend.make.tmp" issue took quite a bit of
> time, so I like to understand the root cause and learn how to avoid
> it. Since only one build tree seems to be affected it seems to be a
> very rare issue, maybe a race condition or such.
>
> Any suggestions how I could analyse further?
>
> Steffen
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