When building assimp we get the following error on Mac OSX 10.8.
Linking CXX shared library ../lib/libassimp.dylib
ld: malformed 64-bit a.b.c.d.e version number: 3.0.1264
clang: error: linker command failed with exit code 1 (use -v to see invocation)
Changing the SV revision number in the build script from 1264 to 255 solves the problem.
see: https://github.com/assimp/assimp/issues/107