clang broken on current?

[Steve Kargl]

Having set CFLAGS+=-march=native -mtune=native and trying to
force qt5-gui configure with -sse2 option, I have a config.summary
that contains (my in-line comments ***)

Build type: freebsd-clang (i386, CPU features: <none>)

*** What????? ***

Compiler: clang 7.0.1
Configuration: compile_examples largefile rdrnd x86SimdAlways sharedr
rpath release c++11 c++14 concurrent dbus reduce_exports reduce_relocations
stl
Build options:
  Mode ................................... release
  Optimize release build for size ........ no
  Building shared libraries .............. yes
  Using C standard ....................... C11
  Using C++ standard ..................... C++14
  Using ccache ........................... no
  Using gold linker ...................... no
  Using precompiled headers .............. no
  Using LTCG ............................. no
  Target compiler supports:
    SSE .................................. <none>

*** That's not good. ***

    AVX .................................. <none>
    AVX512 ............................... <none>
    Other x86 ............................ RDRAND
    Intrinsics without -mXXX option ...... yes
  Build parts ............................ libs tools


-- 
Steve