Wireshark-bugs: [Wireshark-bugs] [Bug 10792] SSE 4.2 support being both enabled and disabled in

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From: bugzilla-daemon@xxxxxxxxxxxxx
Date: Wed, 21 Jan 2015 00:33:14 +0000

Comment # 14 on bug 10792 from 
Step 1: when checking whether nmmintrin.h works, add -msse4.2 at the
*beginning* of CFLAGS, so that user (or Gentoo build process) settings with
-mno-sse4.2 override it.

I also need to fix up CMake's tests (it's not checking for nmmintrin.h or
checking whether it works), and then add checks to see whether the #pragma
works and use it if it does.

The first step should fix the bug, at the expense of not supporting SSE 4.2 if
disabled at compile time even if the hardware supports it.

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