From: noone@noone.net   
      
   On Fri 1/2/2026 7:33 PM, Ben Bacarisse wrote:   
   >   
   > A pattern I've used more than once when setting up a table of function   
   > pointers that act like op-codes.  Maybe you have an add function, a sub   
   > function, a mul functions and a div function.  These are all defined in   
   > a file arithmetic.c, but the table (maybe in another file) needs to see   
   > declarations of the names:   
   >   
   > typedef double operation(double, double);   
   > /* ... */   
   >   
   > extern operation add, sub, mul, div;   
   >   
   > static struct {   
   >      char *name;   
   >      operation *function;   
   > } ops[] = {   
   >      { "add",      add },   
   >      { "subtract", sub },   
   >      { "multiply", mul },   
   >      { "divide",   div }   
   > };   
   >   
      
   ... with a remark that `extern` is completely redundant here.   
      
      operation add, sub, mul, div;   
      
   is already a proper bunch of non-defining function declarations.   
   `extern` does not make it more "non-defining" than it already is.   
      
   --   
   Best regards,   
   Andrey.   
      
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