Less inline please...

[skoe]

In my project there's a C module which contains a small function. It is used twice in the module. I noticed that the program gets about 30 bytes smaller when I put the function into an external C module. Appearently the function is inlined in the first case which makes the program larger. This all was tested with -Os.

I guess this is not the only place where this happens. Is there a way to tell the compiler not to inline a function, except by putting it into another source file? (Don't laugh about this question, I'll run out of memory soon ;) )

Thomas

[richard]

You can use the noinline attribute in C to specify a function shouldn't be inlined. For example:

Code: Select all

static void f() __attribute__((noinline));

int x;

static void f()
{
  x = 1;
}

void g()
{
  /* This call won't be inlined. */
  f();
}

[skoe]

Great, thank you!