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+<!--
+
+ Copyright (c) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 The SCons Foundation
+
+ Permission is hereby granted, free of charge, to any person obtaining
+ a copy of this software and associated documentation files (the
+ "Software"), to deal in the Software without restriction, including
+ without limitation the rights to use, copy, modify, merge, publish,
+ distribute, sublicense, and/or sell copies of the Software, and to
+ permit persons to whom the Software is furnished to do so, subject to
+ the following conditions:
+
+ The above copyright notice and this permission notice shall be included
+ in all copies or substantial portions of the Software.
+
+ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
+ KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
+ WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+-->
+
+ <para>
+
+ We've already seen how you can use the &Alias;
+ function to create a target named <literal>install</literal>:
+
+ </para>
+
+ <scons_example name="ex1">
+ <file name="SConstruct" printme="1">
+ env = Environment()
+ hello = env.Program('hello.c')
+ env.Install('__ROOT__/usr/bin', hello)
+ env.Alias('install', '__ROOT__/usr/bin')
+ </file>
+ <file name="hello.c">
+ int main() { printf("Hello, world!\n"); }
+ </file>
+ </scons_example>
+
+ <para>
+
+ You can then use this alias on the command line
+ to tell &SCons; more naturally that you want to install files:
+
+ </para>
+
+ <scons_output example="ex1" os="posix">
+ <scons_output_command>scons -Q install</scons_output_command>
+ </scons_output>
+
+ <para>
+
+ Like other &Builder; methods, though,
+ the &Alias; method returns an object
+ representing the alias being built.
+ You can then use this object as input to anothother &Builder;.
+ This is especially useful if you use such an object
+ as input to another call to the &Alias; &Builder;,
+ allowing you to create a hierarchy
+ of nested aliases:
+
+ </para>
+
+ <scons_example name="ex2">
+ <file name="SConstruct" printme="1">
+ env = Environment()
+ p = env.Program('foo.c')
+ l = env.Library('bar.c')
+ env.Install('__ROOT__/usr/bin', p)
+ env.Install('__ROOT__/usr/lib', l)
+ ib = env.Alias('install-bin', '__ROOT__/usr/bin')
+ il = env.Alias('install-lib', '__ROOT__/usr/lib')
+ env.Alias('install', [ib, il])
+ </file>
+ <file name="foo.c">
+ int main() { printf("foo.c\n"); }
+ </file>
+ <file name="bar.c">
+ void bar() { printf("bar.c\n"); }
+ </file>
+ </scons_example>
+
+ <para>
+
+ This example defines separate <literal>install</literal>,
+ <literal>install-bin</literal>,
+ and <literal>install-lib</literal> aliases,
+ allowing you finer control over what gets installed:
+
+ </para>
+
+ <scons_output example="ex2" os="posix">
+ <scons_output_command>scons -Q install-bin</scons_output_command>
+ <scons_output_command>scons -Q install-lib</scons_output_command>
+ <scons_output_command>scons -Q -c __ROOT__/</scons_output_command>
+ <scons_output_command>scons -Q install</scons_output_command>
+ </scons_output>