Recompile Boost libraries with g++-4.5

On that machine, I use g++-4.5, 4.6, and 4.7. If I compile the Boost
libraries with the oldest compiler, the binary compatibility is ensured,
because the soname of libstd++ is libstdc++.so.6 for all of those
compilers (but the binary compatibility is only ensured backward: if a
Boost library is compiled with g++-4.6, that does not work if it is after
linked with libstdc++ of g++-4.5).

Maintenance/infrastructure/renoir.geometryfactory.com/boost/compile-boost

@@ -8,7 +8,7 @@ if [ ! -x $BJAM ]; then
     BJAM=bjam
 fi
 
-"$BJAM" $OPTS toolset=gcc-4.6.3
+"$BJAM" $OPTS toolset=gcc-4.5.4
 "$BJAM" --stagedir=stage-cxxdebug $OPTS toolset=gcc-cxxdebug
 
 source ~/infrastructure/reference-platforms/x86-64_Linux-2.6_IntelCompiler-12.0-with-g++-4.6.2_F16/setup 

Maintenance/infrastructure/renoir.geometryfactory.com/boost/user-config.jam

@@ -44,6 +44,8 @@
 # Configure specific gcc version, giving alternative name to use.
 # using gcc : 3.2 : g++-3.2 ;
 
+# G++ 4.5
+using gcc : : /usr/local/packages/gcc-4.5/bin/g++ ;
 
 # -------------------
 # MSVC configuration.