April 2015
Intermediate to advanced
256 pages
5h 49m
English
Content preview from The GNU Make BookBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Chapter 2. Makefile Debugging
This chapter covers techniques that can be useful when debugging makefiles. The lack of built-in debugging tools, and the complexities of following variables in make, can make it very challenging to understand why a particular target was (or more often was not) built.
The first recipe in this chapter shows the single most useful line that you can add to a makefile; it’s the equivalent of a print statement inserted into code for debugging.
Printing the Value of a Makefile Variable
If you’ve ever looked in a makefile, you’ll realize that makefile variables (often just called variables) form the backbone of any make process. Variables often define which files will be compiled, what command line parameters to pass to compilers, ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.