I'm trying to write a makefile to replace one of the scripts used in building a fairly large application.
The current script compiles one file at a time, and the primary reason for using make is to parallelise the build process. Using make -j 16 I currently get a factor of 4 speedup on our office server.
But what I've lost is some readability of the output. The compilation program for a file bundles up a few bits and pieces of work, including running custom pre-compilers, and running the gcc command. Each of these steps outputs some information, and I would prefer it to buffer the output from the command, and then show the whole lot in one go.
Is it possible to make make do this?
A simple way to accomplish this is to send all the log output a to log directory with each file named, say:
log_file_20131104_12013478_b.txt // log_file_<date>_<time>_<sequence letter>.txt
and then simply cat them all together as your last make job in the dependency chain:
cat log_dir/log_file_20131104_12013478_*.txt > log_file_20131104_12013478.txt
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