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C++ Installation - Unix
=======================
+If you get the source from github, you need to generate the configure script
+first:
+
+ $ ./autogen.sh
+
+This will download gtest source (which is used for C++ Protocol Buffer
+unit-tests) to the current directory and run automake, autoconf, etc.
+to generate the configure script and various template makefiles.
+
+You can skip this step if you are using a release package (which already
+contains gtest and the configure script).
+
To build and install the C++ Protocol Buffer runtime and the Protocol
Buffer compiler (protoc) execute the following: