title: ___sincosf_stret crash on iOS 5.1
body: <p>Recently I have updated to Xcode 5 and now my iOS app crashes on the following code:</p>
  
  <pre><code>float some_var_a = sinf(...);
  float some_var_b = cosf(...);
  </code></pre>
  
  <p>Crash log says the following:</p>
  
  <pre><code>Dyld Error Message:
  Symbol not found: ___sincosf_stret
  Referenced from: /var/mobile/Applications/702C8CF3-BB96-41F0-9525-5D65B7A581F3/Magic        Encyclopedia: Illusions HD.app/Magic Encyclopedia: Illusions HD
  Expected in: /usr/lib/libSystem.B.dylib
  Dyld Version: 199.6
  </code></pre>
  
  <p>As I understood the problem is in sin/cos optimization made by compiler. It tries to calculate both sin and cos values in one call of ___sincosf_stret function, but by some reason there is no such function in the libSystem.B.dylib.</p>
  
  <p>Could anyone please help:</p>
  
  <p>1) Why it occurs?</p>
  
  <p>2) How to solve? Currently I am just avoiding call both sin and cos in one place, and it works. But it's a bad solution.</p>