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tools/build/example/variant/a.cpp

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+// Copyright Vladimir Prus 2004.
+// Distributed under the Boost Software License, Version 1.0.
+// (See accompanying file LICENSE_1_0.txt
+// or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+void l();
+int main() { l(); return 0; }

tools/build/example/variant/jamfile.jam

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+# Copyright 2004 Vladimir Prus
+# Distributed under the Boost Software License, Version 1.0.
+# (See accompanying file LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt)
+
+
+# By default, build the project with the two variants we have defined in
+# jamroot.jam.
+
+project : default-build crazy super_release ;
+
+exe a : a.cpp libs//l ;

tools/build/example/variant/jamroot.jam

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+# Copyright 2004 Vladimir Prus 
+# Distributed under the Boost Software License, Version 1.0. 
+# (See accompanying file LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt) 
+
+
+# Define a build variant which is just combination
+# of four properties. 
+variant crazy : <optimization>speed <inlining>off 
+                <debug-symbols>on <profiling>on ;
+		
+# Define a built variant inherited from 'release'.
+# It defines one new property and get all properties
+# from parent variant.		
+variant super_release : release : <define>USE_ASM ;

tools/build/example/variant/libs/jamfile.jam

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+# Copyright 2004 Vladimir Prus 
+# Distributed under the Boost Software License, Version 1.0. 
+# (See accompanying file LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt) 
+
+
+lib l : l.cpp ;

tools/build/example/variant/libs/l.cpp

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+// Copyright Vladimir Prus 2002-2004.
+// Distributed under the Boost Software License, Version 1.0.
+// (See accompanying file LICENSE_1_0.txt
+// or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+#ifdef _WIN32
+__declspec(dllexport)
+#endif
+void l() {}

tools/build/example/variant/readme.txt

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+Copyright 2004 Vladimir Prus
+Distributed under the Boost Software License, Version 1.0.
+(See accompanying file LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt)
+
+
+This example shows how user can create his own build variants. Two variants are
+defined: "crazy", which is just a random combination of properties, and
+"super-release", which is inherited from "release", and differs by a single
+define.
+
+See the jamroot.jam for the definitions.