[Users] compile problems on OSX High Sierra using homebrew

[Roland Haas]

Hello all,

I am getting odd compile errors on OSX using osx-homebrew.cfg (in
master). 

There seem to be two different errors right now:

* _mm_add_ps is not found (even though xmmintrin.h exists)
* ranlib (it uses XCode's) complains about the .a files that it claims
  have no symbols. Forcing the use of ranlib from homebrew does not
  show the error but then I need to hard-code the full path since
  homebrew does not put ranlib in /usr/local/bin

I attach the make output (both types of errors are visible at the end).

A side node: to have remote commands work on OSX (ie remote compiling
*on* my OSX laptop not from it) only works if I add
"source /etc/profile" to my envsetup (otherwise /usr/local/bin is not
added to $PATH it seems).

Has anyone seen these types of errors before and / or could point me to
a "canonical" location for ranlib on OSX (rather
than /usr/local/Cellar/binutils/2.30/x86_64-apple-darwin17.3.0/bin/ranlib)?

Yours,
Roland

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