Compile functionObjects
Once you are in possess of the source files (.c and .h) of the objectFunction.
A new directory must be added at $FOAM_SRC/functionObject/…/.
i.g. a Reynolds number custom functionObject files should be added in this plausible directory
$FOAM_SRC/functionObject/field/ReynoldsNo
Then compiler instruction must be added in this case in:
echo "ReynoldsNo/ReynodsNo.c" >> $FOAM_SRC/functionObjects/field/Make/files
Then run from parent directory of the application you have changed (i.e. $FOAM_SRC/functionObject/field in this case) the command
wmake