RE: serial vs parallel for ar

[PATTON, BILLY \(SBCSI\)]

No, David you answered the right question.
> If this isn't your current problem it may well be your next one.
it is and it is :( bummer!


> -----Original Message-----
> From: address@hidden 
> [mailto:address@hidden On Behalf 
> Of David Boyce
> Sent: Thursday, May 18, 2006 9:00 AM
> To: address@hidden
> Subject: Re: serial vs parallel for ar
> 
> 
> At 09:45 AM 5/18/2006, Alexey Neyman wrote:
> >Just to add. I encountered similar problem when I attempted to use
> >parallel make for a project that used the following rule:
> >
> >(%.o): %.c
> >         $(CC) -c -o $% %<
> >         $(AR) cru $@ $%
> >         $(RM) $%
> >
> >Suspecting somewhat similar in Mr.Patton's project.
> 
> I have not read this thread in detail, so apologies if this is an 
> answer to the wrong question. But there's a longstanding issue with 
> ar and parallelism due to the fact that many ar programs create a 
> statically named temp file in the current directory. It has to do 
> with generating the symbol table, during the course of which ar 
> creates a file called "__SYMDEF" (or something like that, this is 
> from memory). This is not just a problem for parallel updates to the 
> same archive but also for building multiple libraries in the same 
> directory. The workaround is a build script which creates and cds 
> into a temp directory, something like
> 
>          (mkdir ar.$$$$.d && cd ar.$$$$.d && [ar command here] && cd 
> .. && rmdir ar.$$$$.d)
> 
> If this isn't your current problem it may well be your next one.
> 
> -David Boyce
> 
> 
> 
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