codeblocks-ep/help/html/programmerHelp/make/MAKEFILES-Variable.html at master · maifeeulasad/codeblocks-ep · GitHub

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Node:<a name="MAKEFILES%20Variable">MAKEFILES Variable</a>,
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<h3 class="section">The Variable <code>MAKEFILES</code></h3>

   <p>If the environment variable <code>MAKEFILES</code> is defined, <code>make</code>
considers its value as a list of names (separated by whitespace) of
additional makefiles to be read before the others.  This works much like
the <code>include</code> directive: various directories are searched for those
files (see <a href="Include.html#Include">Including Other Makefiles</a>).  In addition, the
default goal is never taken from one of these makefiles and it is not an
error if the files listed in <code>MAKEFILES</code> are not found.

   <p>The main use of <code>MAKEFILES</code> is in communication between recursive
invocations of <code>make</code> (see <a href="Recursion.html#Recursion">Recursive Use of <code>make</code></a>).  It usually is not desirable to set the environment
variable before a top-level invocation of <code>make</code>, because it is
usually better not to mess with a makefile from outside.  However, if
you are running <code>make</code> without a specific makefile, a makefile in
<code>MAKEFILES</code> can do useful things to help the built-in implicit
rules work better, such as defining search paths (see <a href="Directory-Search.html#Directory%20Search">Directory Search</a>).

   <p>Some users are tempted to set <code>MAKEFILES</code> in the environment
automatically on login, and program makefiles to expect this to be done.
This is a very bad idea, because such makefiles will fail to work if run by
anyone else.  It is much better to write explicit <code>include</code> directives
in the makefiles.  See <a href="Include.html#Include">Including Other Makefiles</a>.

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