This directory contains the source code for the Qt Meta Object Compiler (moc). The files moc_yacc.cpp, moc_yacc.h and moc_lex.cpp are generated by lex and yacc from moc.l and moc.y. To compile the moc program from scratch, you need lex and yacc. These tools are preinstalled on most Unix systems, often as symbolic links to flex and byacc or bison. If you run Windows, you can install the Cygwin32 package available at ftp://ftp.cygnus.com/pub/gnu-win32/win32.