On Jun 22, 2005, at 8:38 AM, Beman Dawes wrote: For Apple/Mac OS X tests, BGDX and Dirxion are failing all tests involving dynamic linking. Yet these same tests are passing for dmcgrath and OSL. [snip] Could Dirxion have a similar problem? The failure kind for Dirxion is quite different... while the BGDX problems manifested themselves as complaints about "-shared" being an unknown option, the Dirxion tests are failing with something really weird: Courier/usr/bin/libtool: for architecture: cputype (16777234) cpusubtype (0) file: -lSystem is not an object file (not allowed in a library) ...failed darwin-Link-DyLib-action /Users/stephencarson/Development/boost/results/bin/boost/libs/config/test/link/liblink_test.dylib/gcc-3_3-darwin/debug/shared-linkable-true/liblink_test-gcc33-d-1_33.dylib... It's a really strange error message, especially since others have a similar configuration to Dirxion's and haven't had a problem. The dmcgrath tests are running on Tiger (with a G4 Powerbook) as well, but haven't shown the same issues... Stephen, have you upgraded to Xcode 2.1? Doug