Hi folks, Is there any difference between declaring functions with prefix "extern" and without "extern" keyword in header files?? For example, I define a function FUNC(void, int) in test.c. And test.c includes the test.h with the following two conditions: --test.h with extern-- extern void FUNC(void, int); --test.h without extern-- void FUNC(void, int); The output result seems no difference, and also the compiler does not show warning messages for both cases. Can anyone advise what the 'extern' keyword effects in the header file? Best Regards Ming-Chia
