Log message:
Fix build with modular Xorg where libXt is needed at build time.

Log message:
Needs a C compiler.

Log message:
Import of the fltk example application sudoku that can generate sudoku 
games and solve them.

Sudoku (pronounced soo-dough-coo with the emphasis on the first syllable) 
is a simple number-based puzzle/game played on a 9x9 grid that is divided 
into 3x3 subgrids. The goal is to enter a number from 1 to 9 in each cell 
so that each number appears only once in each column and row. In addition, 
each 3x3 subgrid may only contain one of each number.