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POError building protocol buffer with the Android NDK
 

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    <p>I try to build the protocol buffer library in the Android NDK (full lib). (<a href="https://stackoverflow.com/questions/7144008/how-to-build-protocol-buffer-by-android-ndk">How to build protocol buffer by Android NDK</a>). But when I execute <code>ndk-build</code>, I get an error</p> <pre><code>... Compile++ thumb : protobuf &lt;= printer.cc Compile++ thumb : protobuf &lt;= tokenizer.cc Compile++ thumb : protobuf &lt;= zero_copy_stream_impl.cc Compile++ thumb : protobuf &lt;= importer.cc Compile++ thumb : protobuf &lt;= parser.cc SharedLibrary : libprotobuf.so jni/src/google/protobuf/io/tokenizer.cc:928: error: undefined reference to 'google::protobuf::StringAppendF(std::string*, char const*, ...)' collect2: error: ld returned 1 exit status make: *** [obj/local/armeabi/libprotobuf.so] Error 1 </code></pre> <p>This is source code contains error:</p> <pre><code>... // Helper to append a Unicode code point to a string as UTF8, without bringing // in any external dependencies. static void AppendUTF8(uint32 code_point, string* output) { uint32 tmp = 0; int len = 0; if (code_point &lt;= 0x7f) { tmp = code_point; len = 1; } else if (code_point &lt;= 0x07ff) { tmp = 0x0000c080 | ((code_point &amp; 0x07c0) &lt;&lt; 2) | (code_point &amp; 0x003f); len = 2; } else if (code_point &lt;= 0xffff) { tmp = 0x00e08080 | ((code_point &amp; 0xf000) &lt;&lt; 4) | ((code_point &amp; 0x0fc0) &lt;&lt; 2) | (code_point &amp; 0x003f); len = 3; } else if (code_point &lt;= 0x1fffff) { tmp = 0xf0808080 | ((code_point &amp; 0x1c0000) &lt;&lt; 6) | ((code_point &amp; 0x03f000) &lt;&lt; 4) | ((code_point &amp; 0x000fc0) &lt;&lt; 2) | (code_point &amp; 0x003f); len = 4; } else { // UTF-16 is only defined for code points up to 0x10FFFF, and UTF-8 is // normally only defined up to there as well. StringAppendF(output, "\\U%08x", code_point); //&lt;---- This error string return; } tmp = ghtonl(tmp); output-&gt;append(reinterpret_cast&lt;const char*&gt;(&amp;tmp) + sizeof(tmp) - len, len); } ... </code></pre> <p>If this line is commented out, it compiles. How to solve this problem?</p> <p>PS: <code>protobuf_lite_static</code>, <code>protobuf_static</code> and <code>protobuf_lite_shared</code> build successfully.</p>
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