[Boost-build] configuring gcc with spaces in directory

Subject: [Boost-build] configuring gcc with spaces in directory
From: lepere (renaud.lepere_at_[hidden])
Date: 2011-09-08 12:53:24

  I try to configure g++/mingw in user-config.jam but i have a problem 
if the compiler is under a directory with a space within such as :
using gcc : 4.2 : "c:/Renaud/alma/BuildTools/optional/min 
gw/bin/mingw32-g++-sjlj.exe" ;
(space between "min" and "gw")

I looked into gcc.jam and apparently there is something wrong with the 
lines :
     #   Autodetect the version and flavor if not given.
     if $(command)
     {
         echo "BEFORE: " ;                       (*)
         echo $(command-string) ;            (*)
         local machine = [ MATCH "^([^ ]+)"
             : [ SHELL "$(command-string) -dumpmachine" ] ] ;
         version ?= [ MATCH "^([0-9.]+)"
             : [ SHELL "$(command-string) -dumpversion" ] ] ;
(*) added lines for debugging

since i get as output

BEFORE:
c:/Renaud/alma/BuildTools/optional/min gw/bin/mingw32-g++-sjlj.exe
'c:/Renaud/alma/BuildTools/optional/min' n'est pas reconnu (french of is 
not recognized...)

How should i invoke the command ?

Thanks,

Renaud