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Uncalled segment due to external variable?

T. Ma

I know you have many discussions about warning L16 but I couldn't find one that would match with my problem below.

I got a warning L16: uncalled segment - SEGMENT: ?PR?API_module2?MODULE2 which my app had nothing to do with. See code below:

in test.c:  ---> app code built with lib1.lib
main {
 api_module1();
}

in module1.c: ----> part of lib1.lib
volatile char var1
api_module1( void ) {
   var1 = ...
}

in module2.c: ----> part of lib1.lib
extern volatile char var1
api_module2 ( void ) {
 if (var1 == ...)
}

I suspect the reason I got this warning was because of the global variable var1 (can't find any other link between these two modules except for this global variable).

Question:
If this variable is actually causing this problem, how do I get rid of it as it is increasing my app's code size unnecessary (by also include module2).
If this variable could not possible be causing this warning, where else should I look?

Also, in module2.c I have another API which does NOT use this var1 global variable but I also got the same warning. Any idea?

Parents
  • 0 in reply to T. Ma

    Just out of curiosity: In uVision2, when bringing up 'options for library lib1.lib', the menu will show a list of 'Select module to always include' module (all .c files) available to the application from this lib1.lib. I'm wondering if there is such option to select 'Always exclude' module.

Reply
  • 0 in reply to T. Ma

    Just out of curiosity: In uVision2, when bringing up 'options for library lib1.lib', the menu will show a list of 'Select module to always include' module (all .c files) available to the application from this lib1.lib. I'm wondering if there is such option to select 'Always exclude' module.

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