I've recently been getting an error that has been preventing me from building.  I'm thinking something auto updated and I'm aware the x11 situation has changed in 10.9.

Is anyone using OSX?  

Here is the error

....cmx -linkpkg

ld: library not found for -lX11

clang: error: linker command failed with exit code 1 (use -v to see invocation)==========================================================================================================================================================     ] 00306 / 00311

File "caml_startup", line 1:

Error: Error during linking

*** omake: 306/311 targets are up to date                                                                                                                                                                                                                     

*** omake: failed (25.14 sec, 50/50 scans, 51/196 rules, 253/613 digests)

*** omake: targets were not rebuilt because of errors:                                                                                                                                                                                                        

   analysis_seq.opt

Failed to build Analysis Sequencer