Experimental Physics and
Industrial Control System

On Jun 22, 2021, at 4:48 PM, Mark Rivers via Core-talk <core-talk at aps.anl.gov> wrote:

I just noticed something strange.  “make” is installing the same files each time I run it, even though they are already installed.

 

corvette:~/devel/areaDetector/ADCore>make -sj

Installing library ../../../lib/linux-x86_64/libADBase.a

Installing library ../../../lib/linux-x86_64/libntndArrayConverter.a

Installing library ../../../lib/linux-x86_64/libNDPlugin.a

 

corvette:~/devel/areaDetector/ADCore>make -sj

Installing library ../../../lib/linux-x86_64/libADBase.a

Installing library ../../../lib/linux-x86_64/libntndArrayConverter.a

Installing library ../../../lib/linux-x86_64/libNDPlugin.a

 

This is base 7.0.5 on Centos 7.

Do any of those libraries contain a version number header which gets recreated and triggers recompilation every time you run the build? It would only take the first-built library to do that and the others would then get re-linked with it as a result.

Are you building this on a local disk, or a file share of some kind? This kind of behavior can happen if the clocks of the two systems are slightly out of sync. Can you ‘ls -l’ a file installed into the lib directory and the same file in the build directory to see if their timestamps are any different.

Also try just running a noisy serial ‘make’ in the first build directory to see what’s actually happening.

HTH,

- Andrew