Re: implicit declaration of function 'yylex' is invalid in C99

[Ryan Schmidt]

On Jan 15, 2022, at 03:57, Akim Demaille wrote:

> I personally feel that generating these prototypes automatically is actually 
> more complex (for the user, not for Bison) than merely specifying them.

Ok. Can you provide any guidance for how to specify them?

I am a maintainer of packages within the MacPorts package management system. 
I've encountered many of our ports that fail to build for this reason, and I 
haven't known how to fix them. For other implicit declaration of function 
problems it's usually been a simple matter of including a missing header or 
writing a function prototype, but with bison/flex, there isn't a .c or .h file 
into which such a prototype could be inserted, and even if I knew what file to 
insert it into, I wouldn't know what prototype to write.