$ make clean all
rm -f y.tab.c y.tab.h lex.yy.c thrash README help.c parse.o \
        main.o parse.o scan.o exec.o help.o
cc -c main.c -o main.o -DFLEX_LEX
yacc -d parse.y
cc -c -DFLEX_LEX y.tab.c -o parse.o
lex scan.l
cc -c -DFLEX_LEX lex.yy.c -o scan.o
cc -c exec.c -o exec.o -DFLEX_LEX
echo '#include "version.h"' >help.c
echo 'char *help=' >>help.c
QNM='s/"/\\"/g;s,\$\([a-zA-Z][0-9a-zA-Z]*\)," \1 ",g;';\
        sed "$QNM"'s,.*,"&\\n",' help.tf >> help.c
echo '  ;' >>help.c
cc -c help.c -o help.o -DFLEX_LEX
cc -DFLEX_LEX main.o parse.o scan.o exec.o help.o -o thrash
sed '/^.GF/d;/^.TH/{s,...,***,;s,$, ***,}' doc/thrash/main > README
rm help.c