4glpc - c compiler generates warning re: aclfgli_extend()

In building the latest exercise (17) I am getting these warnings, which I do
not recall seeing before:


Warning : Error file is not empty - but I got no error
Check ex17.warn for details

 more ex17.warn
ex17.c: In function 'aclfgl_get_timeflds':
ex17.c:3968:7: warning: implicit declaration of function 'aclfgli_extend'; did
you mean 'aclfgli_current'? [-Wimplicit-function-declaration]
 3968 |       aclfgli_extend();
      |       ^~~~~~~~~~~~~~
      |       aclfgli_current


I presume that aclfgli_extend() is defined in some object module which is
automatically linked in. It seems to me then that it should be declared in a
header file and the warning messages eliminated thereby.

Or, is this a real problem?

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James B. Byrne                mailto:[email protected]
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