Bakefile: Makefile's generator

It's known problem - general way of making the project. There are many tools for this task: CMake, automake/autoconf, ant (usual for Java) and many-many other. But some of them use own build system and very few uses standard way of Makefile (i.e. generates Makefiles). This method is based on some input format which is translated to Makefile for target compiler. For example, automake/autoconf, Premake (with Lua scripting) and Bakefile (written in Python and is crossplatform, like Premake and many other). It's authors are Vaclav Slavik, Francesco Montorsi.

Bakefile uses XML as input format then generates standard Makefiles for the targets:

autoconf       Makefile.in for GNU Autoconf
borland        Makefile for Borland C++ and Borland make
dmars          Generic Makefile for Digital Mars C/C++
dmars_smake    Makefile for Digital Mars C/C++ with SMAKE
gnu            Makefile for GNU toolchain: GNU Make, GCC...
mingw          Makefile for MinGW: mingw32-make, MinGW...
msvc           Makefile for Visual C++ with Microsoft nmake
msvc6prj       Microsoft Visual C++ 6.0 project files
msevc4prj      Microsoft Embedded Visual C++ 4 project files
msvs2003prj    MS Visual Studio 2003 project files
msvs2005prj    MS Visual Studio 2005 project files
msvs2008prj    MS Visual Studio 2008 project files
suncc          GNU makefile for SunCC compiler
symbian        Symbian development files
watcom         Makefile for OpenWatcom C/C++
xcode2         Apple Xcode 2.4 project files

It's input file looks like:

<exe id="test_sockets">
        <cflags>-fpack-struct</cflags>
        <sources>test_sockets.c</sources>
        <sources>socks.c</sources>
        <sys-lib>pthread</sys-lib>
        <if cond="TOOLSET=='win32'">
            <sys-lib>wsock32</sys-lib>
        </if>
</exe>

This pie of code will build (via native Makefile sure) test_sockets binary from test_sockets.c and socks.c, with pthread library (available on Unix and MinGW too) and with wsock32 library only on Windows.

Another example of custom tag:

<include file="presets/simple.bkl">
    <define-tag name="lit" rules="action">
        <if cond="TOOLSET=='unix'">
            <command></command>pyweb.py -s $(attributes['web']).w
            <command></command>rst2html.py $(attributes['web']).rst $(attributes['web']).html
        </if>
        <if cond="TOOLSET=='win32'">
            <command></command>cmd /C pyweb.py -s $(attributes['web']).w
            <command></command>cmd /C rst2html.py $(attributes['web']).rst $(attributes['web']).html
        </if>
    </define-tag>

    <action id="lit">
        <lit web="maintest">
        <lit web="socks">
    </lit></lit></action>
</include>

This snippet will weave and tangle "literated" sources (with pyweb tool): maintest.w and socks.w but in different manners under Windows and Unix.
All of these snippets should be in <makefile> tag! When you use some tag, see documentation on tag (what outer tags it expect).