CODEWITHSUNDEEP
cgcc
fearless_fool
fearless_fool

Reputation: 35159

Inhibit error messages for unused static functions?

In C code, if a function is used exclusively within a file, it's good practice to declare it to be static.

But sometimes I define a function to be static but don't actually use it (yet), in which case the compiler complains at me:

../src/app.c:79:12: error: 'foo' defined but not used [-Werror=unused-function]

What's the right way to tell the compiler (gcc in this case) that unused static functions are okay?

Upvotes: 4

Views: 1396

Answers (4)

12431234123412341234123
12431234123412341234123

Reputation: 1

Somewhere in a function: (void)unusedFunctionName; This is how you can suppress unused variables warning for any variables and it is compiler independent (some compiler may still warn, but most probably don't and it doesn't break code for other compilers).

Upvotes: 0

KamilCuk
KamilCuk

Reputation: 140960

I am lazy and standard compliant, and just do inline, and it suppresses the warning.

static inline void foo(void)
{
}

Upvotes: 1

David Grayson
David Grayson

Reputation: 87386

You can disable that specific error by providing this argument to GCC:

-Wno-unused-function

The error itself contained a hint that you could do this.

Upvotes: 2

dbush
dbush

Reputation: 223699

You can add the unused attribute to the function:

__attribute__((unused))
static void foo(void)
{
}

Upvotes: 8

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