speedy recompiles

Chris Jones jonesc at hep.phy.cam.ac.uk
Tue Oct 30 16:34:22 UTC 2007


Mike -- EMAIL IGNORED wrote:
> On FC7, in compiling my libraries, I see that
> re-compiles of C++ code goes much faster than
> than the original compiles.  I delete all *.o
> between the compiles.  How does that happen?

I'm guessing you ran make here ? If so, then my second guess would be 
that on the initial run, a lot more was done when you typed make than 
just generating the *.o files (and dependent binaries). make is flexible 
and can be configured to do almost anything.

what happens if you run 'make clean' then make (make clean is a 
semi-standard way of cleaning a package out).

If that doesn't help try build the package again from a clean area 
(unpack the tar file again or whatever) and take a note of the message 
that fly by.

Chris

> 
> Thanks,
> Mike.
> 




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