Makeshort And "local Variable May Be Used Uninitialized" Warning Options

[FredericG]

A macro like MAKESHORT can initialize a variable but the compiler does not know that and generates a warning. Is there a way to solve this without initializing the variable explicitly?

Frederic

[Dave]

FredericG,

A macro like MAKESHORT can initialize a variable but the compiler does not know that and generates a warning. Is there a way to solve this without initializing the variable explicitly?

Please provide an example of what you mean exactly.

Regards
Dave

[FredericG]

FredericG,
Please provide an example of what you mean exactly.
Regards
Dave

u16_t timestamp;

t1con.TMR1ON = 0; // stop timer
MAKESHORT(timestamp, tmr1l, tmr1h);

en_of_pulse = timestamp; <<==== causes warning

It's not the macro that's the problem, but the inline assembly it uses. The compiler doesn't notice if you set a variable with inline assembly statements and warns that it's possibly uninitialized. Declaring the variable as 'volatile' gets rid of the warning, but isn't a great solution as you might miss a true 'uninitialized' case.

I am not an expert, but I think I have seen compilers that have pragma's that give hints to compiler about these things.
Thanks for the workaround, I can for sure live with that solution

Frederic