httpuv installation error on RH6.8AS_64 about httpuv HOT 1 OPEN

• installing source package 'httpuv' ...
  ** package 'httpuv' successfully unpacked and MD5 sums checked
  ** libs

*** arch - i386
Warning: running command 'make -f "Makevars.win" -f "C:/PROGRA1/R/R-321.5/etc/i386/Makeconf" -f "C:/PROGRA1/R/R-321.5/share/make/winshlib.mk" CXX='$(CXX1X) $(CXX1XSTD)' CXXFLAGS='$(CXX1XFLAGS)' CXXPICFLAGS='$(CXX1XPICFLAGS)' SHLIB_LDFLAGS='$(SHLIB_CXX1XLDFLAGS)' SHLIB_LD='$(SHLIB_CXX1XLD)' SHLIB="httpuv.dll" OBJECTS="RcppExports.o filedatasource-unix.o filedatasource-win.o http.o httpuv.o md5.o register.o set_invalid_parameter.o uvutil.o websockets-base.o websockets-hixie76.o websockets-hybi03.o websockets-ietf.o websockets.o"' had status 127
ERROR: compilation failed for package 'httpuv'

• removing 'C:/SWDTOOLS/Rtools/win-library/3.2/httpuv'
  Warning in install.packages :
  running command '"C:/PROGRA1/R/R-321.5/bin/x64/R" CMD INSTALL -l "C:\SWDTOOLS\Rtools\win-library\3.2" C:\Users\44062934\AppData\Local\Temp\RtmpGgWWhs/downloaded_packages/httpuv_1.3.5.tar.gz' had status 1
  Warning in install.packages :
  installation of package ‘httpuv’ had non-zero exit status

The downloaded source packages are in
‘C:\Users\44062934\AppData\Local\Temp\RtmpGgWWhs\downloaded_packages’

from httpuv.