Hi Keith, I get a build error on a clean develop branch on OSX (at least with my toolchain). test/csuite/wt2695_checksum/main.c is the program involved, it indirectly references a data symbol __wt_process. Some linkers don't include .o's from an archive if it only satisfies a data reference. To be more specific:
1) main.o references __wt_checksum_init.
2) linker includes crc32-x86.o (or one of the crc32-*.o modules).
3) that module references data symbol __wt_process.
4) some linkers will include global.o, some don't.
The fix is easy, I just pushed a pull request.