So U08 RX485_oldbyte1; is uninitialized data, but compiler also initialize it to zero, why is it different from inline initialization during declaration, I expect the compiler just replace the zero with the initial value i provide?
Regards Murat Karadeniz http://www.onlinefavbar.com/mukas -----Original Message----- From: Bob Paddock [mailto:[EMAIL PROTECTED] Sent: Monday, January 30, 2006 11:18 PM To: MuRaT KaRaDeNiZ Cc: 'AVR-GCC-list' Subject: Re: [avr-gcc-list] (no subject) You want something more like this: #ifndef _GLOBAL_H_ #define _GLOBAL_H_ (1) #ifdef DEFINE_SPACE_GLOBAL_H #define EXTERN_GLOBAL #else #define EXTERN_GLOBAL extern #endif #if defined(__cplusplus) && __cplusplus extern "C" { #endif EXTERN_GLOBAL u08 RX485_oldbyte3, RX485_oldbyte2, RX485_oldbyte1; #if defined(__cplusplus) && __cplusplus } #endif #endif /* _GLOBAL_H_ */ Then in global.c put: #define DEFINE_SPACE_GLOBAL_H (1) /* This line goes in *ONLY* global.c! */ #include "global.h" Now space will be allocated in global.c, but all other files will get the proper 'extern'. Do not put initialized data in a header file that is included in multiple places. In this example the initialized data belongs in global.c . You can ignore the cplusplus stuff, that is just how I have my emacs templates setup. _______________________________________________ AVR-GCC-list mailing list AVR-GCC-list@nongnu.org http://lists.nongnu.org/mailman/listinfo/avr-gcc-list
