On Tue, 11 Apr 2006, Jonathan Herriott wrote:
> Question then. Why would it work when I don't use variables if I
> don't include the library? This question is just out of curiosity.
That's a pretty good question. In the case where we have pow(x,y), I see
this:
[EMAIL PROTECTED]/src]$ gcc -c pow_test.c
[EMAIL PROTECTED]/src]$ nm pow_test.o
00000000 T main
U pow
U printf
In the case where it is pow(2,3), I see this:
[EMAIL PROTECTED]/src]$ gcc -c pow_test.c
[EMAIL PROTECTED]/src]$ nm pow_test.o
00000000 T main
U printf
So, clearly, something is optimizing the pow() function away when the
arguments are hard-coded lvalues, instead of varibles.
Now, what that thing *is*, I don't know.
-Andy.
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