I have following make rules in my file
one : a.c
echo "hello"
two : c.c
echo "hello"
a.c exists and c.c does not exist ..
My question is
a) How make takes up a rule and decides that target is
out of date and hence command needs to be executed.
b) If the target is not a file but prereq is and this preq file exists then
what happens.
Rule one above a.c exists but make exits with message make: `one' is up to
date.
c) If target exists but prereq does not. If you refer to second rule above
then
make does not execute the command echo "hello" and exits with message
make: *** No rule to make target `c.c', needed by `two'. Stop.
I would be glad if someone could point me to right documentation to
understand better
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