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apkdiff/third_party/zlib/contrib/vstudio/readme.txt

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+The pre-made Visual Studio projects have been removed in lieu of the ability to
+use cmake to build such projects on demand.
+
+To create a Visual Studio project
+---------------------------------
+
+1. Start cmake-gui.
+2. Point source-dir to the source.
+3. Point build-dir to the dir where you want to build.
+4. Hit configure -- there you can select details.
+5. Select the options you want, which are shown with descriptions after the
+   configure run is complete.
+6. Hit configure again to assure that everything that is needed is found.
+7. For those not found, deactivate the option or install the dependency, e.g.
+   bzip2 for minizip, and go back to step 6 until there is no red.
+8. Hit generate.
+9. Hit open project.
+
+Now you can Build > Build solution.
+
+
+See contrib/zlib1-dll/readme.txt for how to build the legacy zlib1.dll.