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I have a small project with two source files, one of them implementing interruptdriven serial I/O for 8051.
However I cannot get SDCC to link my files. I have added a prototype of the interrupt to the main.c containing main() as said in the manual. I still get the following linker error:
$ sdcc --code-loc 0x100 main.rel sio.rel
?ASlink-Warning-Undefined Global '_com_isr' referenced by module 'main'
My main.c has the following declaration:
extern static void com_isr (void) interrupt 4;
While the ISR itself is defined as follows in the sio.c file:
static void com_isr (void) interrupt 4
The files themselves do compile and the assembler output looks sane.
Is there a special trick to this?
try without 'static'
Thanks alot, that did help!