On Sunday, June 5, 2016 at 11:49:55 PM UTC-5, leif wrote:
>
> Well, GCC accepting '-march=native' doesn't imply the dumb Apple 
> assembler accepts all the instructions (here AVX) GCC then emits... 
>

If you pass gcc the flag "-Wa,-q", then it will use clang's assembler 
rather than the ancient version of the GNU assembler that comes with these 
versions of OS X.  See 

http://stackoverflow.com/questions/9840207

I can confirm that adding this flag allowed me to compile all of NTL on 
these machines.  Specifically, changing line 78 of 
"build/pkgs/ntl/spkg-install" to 

       SHAREDFLAGS="-fno-common -Wa,-q"

caused NTL to build smoothly.  

Nathan


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