95 lines
3.0 KiB
Plaintext
Executable File
95 lines
3.0 KiB
Plaintext
Executable File
[/
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Copyright 2004 Vladimir Prus
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Copyright 2017 Rene Rivera
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Distributed under the Boost Software License, Version 1.0.
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(See accompanying file LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt)
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/]
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[section Build Variants]
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This example shows how user can create his own build variants. Two variants are
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defined: "crazy", which is just a random combination of properties, and
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"super-release", which is inherited from "release", and differs by a single
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define.
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Files:
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* [@../../example/variant/a.cpp a.cpp]
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* [@../../example/variant/jamroot.jam jamroot.jam]
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* [@../../example/variant/jamfile.jam jamfile.jam]
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* [@../../example/variant/libs/jamfile.jam libs/jamfile.jam]
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* [@../../example/variant/libs/l.cpp libs/l.cpp]
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[import jamroot.jam]
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[import jamfile.jam]
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[import libs/jamfile.jam]
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In this project the `jamroot.jam` specifies the custom build variants and the
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targets are specified in the two `jamfile.jam` files.
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[jamroot]
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The top-level `jamfile.jam`:
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[jamfile]
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And the library `jamfile.jam` that the top-level `jamfile.jam` refers to:
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[libs_jamfile]
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Building the example yields:
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[teletype]
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```
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> cd /example/variant
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> b2
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...found 20 targets...
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...updating 16 targets...
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common.mkdir bin
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common.mkdir bin/clang-darwin-4.2.1
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common.mkdir bin/clang-darwin-4.2.1/crazy
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clang-darwin.compile.c++ bin/clang-darwin-4.2.1/crazy/a.o
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common.mkdir libs/bin
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common.mkdir libs/bin/clang-darwin-4.2.1
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common.mkdir libs/bin/clang-darwin-4.2.1/crazy
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clang-darwin.compile.c++ libs/bin/clang-darwin-4.2.1/crazy/l.o
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clang-darwin.link.dll libs/bin/clang-darwin-4.2.1/crazy/libl.dylib
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clang-darwin.link bin/clang-darwin-4.2.1/crazy/a
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common.mkdir bin/clang-darwin-4.2.1/super_release
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clang-darwin.compile.c++ bin/clang-darwin-4.2.1/super_release/a.o
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common.mkdir libs/bin/clang-darwin-4.2.1/super_release
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clang-darwin.compile.c++ libs/bin/clang-darwin-4.2.1/super_release/l.o
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clang-darwin.link.dll libs/bin/clang-darwin-4.2.1/super_release/libl.dylib
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clang-darwin.link bin/clang-darwin-4.2.1/super_release/a
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...updated 16 targets...
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```
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As specified in the top-level `jamfile.jam` both custom variants where built
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by default. Once can override that by specifying the variant one wants to
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build directly on the command line with a `variant=super_release`. Or just
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with a `super_release` as variants can be referred to by their name only.
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For example using that argument yields:
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```
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> cd /example/variant
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> b2 super_release
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...found 14 targets...
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...updating 10 targets...
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common.mkdir bin
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common.mkdir bin/clang-darwin-4.2.1
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common.mkdir bin/clang-darwin-4.2.1/super_release
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clang-darwin.compile.c++ bin/clang-darwin-4.2.1/super_release/a.o
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common.mkdir libs/bin
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common.mkdir libs/bin/clang-darwin-4.2.1
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common.mkdir libs/bin/clang-darwin-4.2.1/super_release
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clang-darwin.compile.c++ libs/bin/clang-darwin-4.2.1/super_release/l.o
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clang-darwin.link.dll libs/bin/clang-darwin-4.2.1/super_release/libl.dylib
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clang-darwin.link bin/clang-darwin-4.2.1/super_release/a
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...updated 10 targets...
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```
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[note The actual paths in the `bin` sub-directory will depend on your
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toolset.]
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[endsect]
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