I'm working on a project using C++, Boost, and Qt. I understand how to compress single files and bytestreams using, for example, the qCompress() function in Qt. How do I zip a directory of multiple files, including subdirectories? I am looking for a cross-platform (Mac, Win, Linux) solution; I'd prefer not to fire off a bunch of new processes. Is there a standard way to combine bytestreams from multiple files into a zipped archive, or maybe there is a convenience function or method that would be available in the Boost iostream library? Many thanks for the assistance. Update: The QuaZip library looks really great.

There is an example in the download package (in the 'tests' dir) that shows very clearly how to zip up a directory of files. Update 2: After completing this task on my Linux build environment, I discovered that QuaZip doesn't work at all with the Visual Studio compiler. Are footnotes included in word count in word for mac 2011?.

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It may be possible to tackle all those compiler errors, but a word of caution to anyone looking down this path. I tried QuaZIP 0.4.3 on Windows with VisualStudio 2010 -- there are still issues but can be resolved easily. To build with VS: • Use CMake to configure and generate VS solution for QuaZIP. • Open soltion with VS and build -- you'll first notice that it can't find 'zlib.h'. • Open preferences for quazip project and add path to Qt's copy of Zlib to C/C++->General->Additional Include Directories: $(QTDIR)/src/3rdparty/zlib. • Rebuild again and you'll get lots of warnings and one error C2491: dllimport static issue on QuaZipFile::staticMetaObject.

• This is because QuaZipFile is declared like 'class QUAZIP_EXPORT QuaZipFile' and QUAZIP_EXPORT needs to resolve to Q_DECL_EXPORT for dll and to Q_DECL_IMPORT for application, based on whether QUAZIP_BUILD is defined or not. When building QuaZIP QUAZIP_BUILD should be defined but isn't -- configuration process defines in error completely useless 'quazip_EXPORTS' instead. • To fix, just remove 'quazip_EXPORTS' from all build configurations and add QUAZIP_BUILD instead -- QuaZIP will now build fine.