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How
to run make
A makefile
that says how to recompile a program can be used in more than one way.
The simplest use is to recompile every file that is out of date.
See the following documentation
for more discussion.
Usually, makefiles are written
so that if you run make
with no arguments, it does just that.
However, you might want to
update only some of the files; you might want to use a different compiler
or different compiler options; you might want just to find out which files
are out of date without changing them. By giving arguments when you run
make,
you can do any of these things and many others.
The exit status of make
is always one of the following three values.
0
The exit status is zero
if make
is successful.
2
The exit status is two if
make
encounters any errors. It will print messages describing the particular
errors.
1
The exit status is one if
you use the ‘-q’
flag and make
determines that some target is not already up to date.
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