Can't compile on Mac OS X

What steps will reproduce the problem?
1. Install XCode and other developing tools, and check their working by 
compiling smth from MacPorts. 
2. Download and unpack archive with adda, go to src directory and do make seq.
3.

What is the expected output? What do you see instead?
Successfully compiled application. 
Got error "../param.c:57:4: error: #error "Unknown operation system. Creation 
of lock files is not supported."

What version of the product are you using? On what operating system?
Mac OS 10.6.8, gnu compiler, adda_1.1 version.

Please provide any additional information below.
Adding "|| (defined(__APPLE__) && defined(__MACH__))" and the end of 31 line in 
os.h solve the problem.

Original issue reported on code.google.com by tse...@gmail.com on 25 Jul 2012 at 11:03

Merged into: #83

yogevb / a-dda

Can't compile on Mac OS X #152