Re: Problem with multiple threads need some advise

[John Graham-Cumming]

PATTON, BILLY (SBCSI) wrote:
> But I use makedepend for the c,c++,pro-c.  It apparently opens the file
> for writing.  Nothing else can get to it and I don't know how to make 
> it wait.  Running serially would take too long.
>
> Any suggestions on how to get around this problem?

I assume when you say "It apparently opens the file for writing" you 
mean that makedepend opens the output file (either Makefile, makefile or 
whatever is specified with -f) for writing.   That would make sense 
since it has to write to it, and it would create a problem if you try to 
run multiple makedepends.  Looking at the source code of makedepend 
reveals that it opens the output file once and keeps it open while it 
processes the files.

So your options are:

1. Modify makedepend so that it opens and closes the Makefile only when 
it needs to write out and behaves nicely if someone else has the 
Makefile locked.

2. Specify multiple makedepend processes each with a different Makefile 
output (use -f for that) so that there's no contention and then include 
each of the different Makefiles thus generated.

John.
--
John Graham-Cumming
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