1 files changed, 64 insertions, 5 deletions

diff --git a/doc/user/less-simple.xml b/doc/user/less-simple.xml
index c17bdae..e8ff44a 100644
--- a/doc/user/less-simple.xml
+++ b/doc/user/less-simple.xml
@@ -2,7 +2,7 @@
 <!DOCTYPE sconsdoc [
     <!ENTITY % scons SYSTEM "../scons.mod">
     %scons;
-    
+
     <!ENTITY % builders-mod SYSTEM "../generated/builders.mod">
     %builders-mod;
     <!ENTITY % functions-mod SYSTEM "../generated/functions.mod">
@@ -21,7 +21,7 @@
 
 <!--
 
-  Copyright (c) 2001 - 2017 The SCons Foundation
+  Copyright (c) 2001 - 2019 The SCons Foundation
 
   Permission is hereby granted, free of charge, to any person obtaining
   a copy of this software and associated documentation files (the
@@ -257,7 +257,7 @@ Program('program', Glob('*.c'))
     (see <xref linkend="chap-variants"></xref>, below)
     and repositories
     (see <xref linkend="chap-repositories"></xref>, below),
-    excluding some files 
+    excluding some files
     and returning strings rather than Nodes.
 
     </para>
@@ -311,7 +311,7 @@ Program('hello', ['hello.c'])
     </para>
 
     <important>
-    
+
     <para>
 
     Although &SCons; functions
@@ -359,7 +359,7 @@ Program('program2', common_sources + ['program2.c'])
     <para>
 
     One drawback to the use of a Python list
-    for source files is that 
+    for source files is that
     each file name must be enclosed in quotes
     (either single quotes or double quotes).
     This can get cumbersome and difficult to read
@@ -644,4 +644,63 @@ Program('bar', bar_files)
 
   </section>
 
+  <section>
+  <title>Overriding construction variables when calling a Builder</title>
+
+    <para>
+
+    It is possible to override or add construction variables
+    when calling a builder method by passing additional keyword arguments.
+    These overridden or added variables will only be in effect when
+    building the target, so they will not affect other parts of the build.
+    For example, if you want to add additional libraries for just one program:
+
+    </para>
+
+    <programlisting>
+env.Program('hello', 'hello.c', LIBS=['gl', 'glut'])
+    </programlisting>
+
+    <para>
+
+    or generate a shared library with a non-standard suffix:
+
+    </para>
+
+    <programlisting>
+env.SharedLibrary('word', 'word.cpp',
+                  SHLIBSUFFIX='.ocx',
+                  LIBSUFFIXES=['.ocx'])
+    </programlisting>
+
+    <para>
+
+    It is also possible to use the <literal>parse_flags</literal>
+    keyword argument in an override to merge command-line
+    style arguments into the appropriate construction
+    variables (see &f-link-env-MergeFlags;).
+
+    </para>
+
+    <para>
+
+    This example adds 'include' to &cv-link-CPPPATH;,
+    'EBUG' to &cv-link-CPPDEFINES;, and 'm' to &cv-link-LIBS;.
+
+    </para>
+
+    <programlisting>
+env = Program('hello', 'hello.c', parse_flags='-Iinclude -DEBUG -lm')
+    </programlisting>
+
+    <para>
+
+    Within the call to the builder action the environment is not cloned,
+    instead an OverrideEnvironment() is created which is more
+    light weight than a whole Environment()
+
+    </para>
+
+  </section>
+
 </chapter>