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+To build from source for Linux or other UNIX/UNIX-like systems, it is
+generally sufficient to download just the source qpdf-<version>.tar.gz
+file.
+
+For Windows, there are several additional files that you might want to
+download.
+
+ * qpdf-<version>-bin-mingw32.zip
+
+   If you just want to use the qpdf command line program or use the
+   qpdf DLL's C-language interface, you can download this file.  You
+   can also download this version if you are using MINGW's gcc 4.6 (or
+   a binary compatible version) and want to program using the C++
+   interface.
+
+ * qpdf-<version>-bin-mingw64.zip
+
+   A 64-bit version built with mingw.  Use this for 64-bit Windows
+   systems.  The 32-bit version will also work on Windows 64-bit.
+   Both the 32-bit and the 64-bit version support files over 2 GB in
+   size, but you may find it easier to integrate this with your own
+   software if you use the 64-bit version.
+
+ * qpdf-<version>-bin-msvc32.zip
+
+   If you want to program using qpdf's C++ interface and you are using
+   Microsoft Visual C++ 2010 in 32-bit mode, you can download this
+   file.
+
+ * qpdf-<version>-bin-msvc64.zip
+
+   If you want to program using qpdf's C++ interface and you are using
+   Microsoft Visual C++ 2010 in 64-bit mode, you can download this
+   file.
+
+ * qpdf-external-libs-bin.zip
+
+   If you want to build qpdf for Windows yourself with either MINGW or
+   MSVC 2010, you can download this file and extract it inside the
+   qpdf source distribution.  Please refer to README-windows.txt in
+   the qpdf source distribution for additional details.  Note that you
+   need the 2012-06-20 version or later to be able to build qpdf 3.0
+   or newer.  The 2009-10-24 version is required for qpdf 2.3.1 or
+   older.
+
+ * qpdf-external-libs-src.zip
+
+   If you want to build the external libraries on your own (for
+   Windows or anything else), you can download this archive.  In
+   addition to including unmodified distributions of pcre and zlib, it
+   includes a README file and some scripts to help you build them for
+   Windows.