On 9 May 2005, at 18:08, boost-users-request@lists.boost.org wrote: If you don't mind modifying boost/config/compiler/gcc.hpp ... Here's how I patched it: (very last lines in the file) // last known and checked version is 4.0: #if (__GNUC__ > 4) || ((__GNUC__ == 3) && (__GNUC_MINOR__ > 4)) # if defined(BOOST_ASSERT_CONFIG) # error "Unknown compiler version - please run the configure tests and report the results" # else # warning "Unknown compiler version - please run the configure tests and report the results" # endif #endif BTW: Although my build half-succeeded (or half failed depending on your point of view :-) I'm more and more of the opinion that all this bjam rigmarole is strictly *not* needed! When I got fed up with the miles and miles of warnings/errors, I just decided to drop the "boost" subdir into Xcode and use it "as is". Since boost is supposed to be a 100% header file solution, the rationale for "building it" somehow eludes me ... Anyway, I'm glad to report that I'm up and running with boost 1.32 on OS X 10.4 Tiger with Xcode 2.0 (next step: do the same for CW 9.5 ... :) -- Jean-François Brouillet verec@mac.com