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Altera_Forum
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15 years ago

What is the difference between main() and alt_main()?

I write a very simple program, driving LED through PIO. Both function can work. If using main() , the code size is 1940 bytes. If alt_main(), the code size is 472 bytes. It seems that main() include ...
Altera_Forum's avatar
Altera_Forum
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15 years ago

Actually it is the default alt_main() that contains the extra code - either side of the call to main().

Largely this is code for initialising stdio for printf() - which pulls in a lot of

library code.