Info Catalog make: Rules make: Rules make: Rule Syntax

make: Rule Example

 
 4.1 Rule Example
 ================
 
 Here is an example of a rule:
 
      foo.o : foo.c defs.h       # module for twiddling the frobs
              cc -c -g foo.c
 
    Its target is 'foo.o' and its prerequisites are 'foo.c' and 'defs.h'.
 It has one command in the recipe: 'cc -c -g foo.c'.  The recipe starts
 with a tab to identify it as a recipe.
 
    This rule says two things:
 
    * How to decide whether 'foo.o' is out of date: it is out of date if
      it does not exist, or if either 'foo.c' or 'defs.h' is more recent
      than it.
 
    * How to update the file 'foo.o': by running 'cc' as stated.  The
      recipe does not explicitly mention 'defs.h', but we presume that
      'foo.c' includes it, and that that is why 'defs.h' was added to the
      prerequisites.
 

Info Catalog make: Rules make: Rules make: Rule Syntax