In the location $NWCHEM_TOP/src/tools/build/comex there is no file called "build.log". The folder contains one file called "config.log". This file is different from the config.log file in $NWCHEM_TOP/src/tools/build/.
Yes, that's the one I need to look at.
Sorry for mentioning build.log instead of config.log
Could you post $NWCHEM_TOP/src/tools/build/comex/config.log