message: replace cp -r with rsync on mac
diff: @@ -181,7 +181,7 @@ ifeq ($(uname_os), Linux)
  endif
  ifeq ($(uname_os), Darwin)
  @cd $(builddir)/libOTe/ && find . -name "*.h" -type f |xargs -I {} rsync -R {} $(PWD)/install/include/libOTe
  - @cp -R $(builddir)/libOTe/cryptoTools/cryptoTools/gsl $(PWD)/install/include/libOTe/cryptoTools/cryptoTools
  + @rsync -R $(builddir)/libOTe/cryptoTools/cryptoTools/gsl $(PWD)/install/include/libOTe/cryptoTools/cryptoTools
  endif
  @touch compile-libote
  