[boost] boost libraries and libCstd

Hi, the SUN compiler comes with two C++ standard libraries: libCstd and libstlport. libCstd is the 'old' version of the C++ libraries which has not all features of the standard implemented. The differences are described here: http://developers.sun.com/solaris/articles/cmp_stlport_libCstd.html The linked page also describes workarounds. My question now is, does BOOST officially support libCstd? And if yes, are there macros (#define's) defined to choose the appropriate code (standard or workaround) within the boost library code? The backround: the program_options library and probably some others do not compile/link with libCstd. This is described e.g. in Ticket #3190). Thanks in advance, Sascha