.do file patterns

# default.o.do
# apenwarr's version doesn't escape the slashes in the file name, so it doesn't work on subdirectories.

redo-ifchange $1.c

CFLAGS="..."
INCLUDE="..."

g++ $CFLAGS $INCLUDE -MD -MF $3.deps.tmp -c -o $3 $1.c

# Checks implicit dependencies
ESCAPED_FILE=$(echo "$3" | sed -e 's/\//\\\//g')
DEPS=$(sed -e "s/^$ESCAPED_FILE://" -e 's/\\//g' <$3.deps.tmp)
rm -f $3.deps.tmp
redo-ifchange $DEPS

#-----

# project.do
# Compiles all .c files into .o files, over all subdirectories except ./lib
# apenwarr would have you list all of the .o files manually
for file in `find . -name lib -prune -o -name '*.c' -print`; do
	DEPS="$DEPS ${file%.c}.o ";
done
redo-ifchange $DEPS
...