c++ - boost b2 build 64 bit results in argument error missing argument -

i trying build 64 bit libraries using boost's b2. followed steps tee keep getting annoying error missing argument setup-script.

here user-config.jam file put home directory:

# ------------------- # msvc configuration. # -------------------  # configure msvc (default version, searched in standard locations , path). # using msvc ;  # configure specific msvc version (searched in standard locations , path). using msvc : 12.0 : "c:/program files (x86)/microsoft visual studio 12.0/vc/bin/x86_amd64/cl.exe" ;  # --------------------- # python configuration. # ---------------------  # configure specific python version. # using python : 3.5 : c:\\users\\jchen114\\anaconda3 : c:\\users\\jchen114\\anaconda3\\include : c:\\users\\jchen114\\anaconda3\\lib ;  using python      : 3.5                   # version     : "c:\\users\\jchen114\\anaconda3\\python.exe"      # python path     : "c:\\users\\jchen114\\anaconda3\\include"         # include path     : "c:\\users\\jchen114\\anaconda3\\libs"            # lib path(s)     : <define>boost_all_no_lib=1     ; 

i run command in root boost directory:

./b2 msvc address-model=64 stage 

then error:

*** argument error * rule maybe-rewrite-setup ( toolset : setup-script : setup-options : version : rewrite-setup ? ) * called with: ( msvc :  :  : 12.0 :  ) * missing argument setup-script 

the funny thing if rid of x86_amd64 directory in msvc configuration line this:

using msvc : 12.0 : "c:/program files (x86)/microsoft visual studio 12.0/vc/bin/cl.exe" ; 

it begins build.

how make boost build 64 bit version of libraries, correctly?