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copied!<p>Here is how I've built libjpeg using MinGW on Windows :</p> <h2>1. Get MinGW with MSYS</h2> <p>I've got a copy from <a href="http://sourceforge.net/projects/mingw/">http://sourceforge.net/projects/mingw/</a>. Quoting from www.mingw.org :</p> <blockquote> <p>MSYS is a collection of GNU utilities such as bash, make, gawk and grep to allow building of applications and programs which depend on traditionally UNIX tools to be present.</p> </blockquote> <p>We will need it to run the <code>configure</code> script that comes with libjpeg sources.</p> <p><br></p> <h2>2. Get libjpeg sources</h2> <p>From <a href="http://www.ijg.org/">http://www.ijg.org/</a>, take the Unix format package (the Windows one won't work with this procedure). I took the <code>jpeg_8d</code> version.</p> <p><br></p> <h2>3. Prepare a building directory</h2> <p>I've made a temporary directory named <code>tmp</code> in <code>D:\</code>, but you could choose whatever suits your needs. The thing that matters is the name of paths in MSYS. As it brings some * <em>Unixity</em> * to Windows, paths cannot be used in their original form. In a nutshell:</p> <p><code>C:\path\to\file</code> becomes <code>/c/path/to/file</code> in MSYS land, an so <code>D:\tmp</code> becomes <code>/d/tmp</code>.</p> <p>Decompress the libjpeg sources in <code>D:\tmp</code>, so you have a <code>jpeg-8d</code> directory in there.</p> <p>Create a <code>jpeg-build</code> directory inside <code>D:\tmp</code>, it will hold the built library.</p> <p>Now everything is ready for the build.</p> <p><br></p> <h2>4. ./configure, make, make install</h2> <p>That is the mantra of building in Unix land. An option should be added to redirect the install process to <code>D:\tmp\jpeg-build</code>.</p> <p>Run the following commands in an MSYS shell (also named MinGW shell in Windows start menu):</p> <pre><code>cd /d/tmp/jpeg-8d ./configure --prefix=/d/tmp/jpeg-build make make install </code></pre> <p>As an additional step, you can run <code>make test</code> for safety.</p> <p>These commands will build both static and shared versions of libjpeg.</p> <p><br></p> <h2>5. Take the goods, delete the temporaries</h2> <p>If everything runs fine, you can delete the <code>D:\tmp\jpeg-8d</code> directory, but keep the <code>jpeg-build</code> one. It contains:</p> <ul> <li>an <code>include</code> directory, containing libjpeg headers. You can move them to your compiler's headers directory.</li> <li>a <code>lib</code> directory, with <code>.a</code> file to pass to the linker. You can move them to your compiler's library directory.</li> <li>a <code>bin</code> directory, holding the libjpeg shared library <code>libjpeg-8.dll</code> and jpeg tools.</li> <li>a <code>share</code> directory, containing <code>man</code> pages for the jpeg tools.</li> </ul> <p>You can now build your program and link it against libjpeg by indicating the right include and library paths.</p> <p><br></p> <p>You can find many details about the libjpeg building and installation process in <code>install.txt</code> inside the source package.</p> <p>I hope this will be useful.</p>

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