Hi Martin,

I realize this isn't your code but you might be able to help since the official documentation is barren of mentions of how to compile book.bin.

Included in the source code is a book.c file. Is this to compile and output a 'book' executable file which is then used to make books.bin from the .pgn file? If so, first, I had to edit book.c and chess.h to insert a '#define UNIX' so that it wouldn't keep trying to load 'windows.h'. Second, I got these errors:

make book

cc book.c -o book
/usr/lib/gcc/x86_64-linux-gnu/7/../../../x86_64-linux-gnu/Scrt1.o: In function _start': (.text+0x20): undefined reference to main'
/tmp/ccqptcMM.o: In function Book': book.c:(.text+0x70): undefined reference to moves_out_of_book'
book.c:(.text+0xa5): undefined reference to books_file' book.c:(.text+0xc1): undefined reference to books_file'
book.c:(.text+0xd8): undefined reference to `books_file'

Any ideas? I'm just trying to run crafty chess as a benchmarking tool, and want to give it some books to process and see how long it takes.

Thanks for any insight you can provide.