Miniz zipping seems to work.

src/libslic3r/Zipper.hpp

@@ -0,0 +1,51 @@
+#ifndef ZIPPER_HPP
+#define ZIPPER_HPP
+
+#include <string>
+#include <memory>
+
+namespace Slic3r {
+
+class Zipper {
+public:
+    enum e_compression {
+        NO_COMPRESSION,
+        FAST_COMPRESSION,
+        TIGHT_COMPRESSION
+    };
+
+private:
+    class Impl;
+    std::unique_ptr<Impl> m_impl;
+    std::string m_data;
+    std::string m_entry;
+    e_compression m_compression;
+    std::string m_zipname;
+
+public:
+
+    // Will blow up in a runtime exception if the file cannot be created.
+    explicit Zipper(const std::string& zipfname,
+                    e_compression level = NO_COMPRESSION);
+    ~Zipper();
+
+    Zipper(const Zipper&) = delete;
+    Zipper& operator=(const Zipper&) = delete;
+
+    Zipper(Zipper&&) = default;
+    Zipper& operator=(Zipper&&) = default;
+
+    void add_entry(const std::string& name);
+    void finish_entry();
+
+    inline Zipper& operator<<(const std::string& content) {
+        std::copy(content.begin(), content.end(), std::back_inserter(m_data));
+        return *this;
+    }
+
+    std::string get_name() const;
+};
+
+}
+
+#endif // ZIPPER_HPP