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POWrapping a C++ library in Objective-C is not hiding the C++ symbols
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copied!<p>I am trying to wrap a C++ library (for Sybase Ultralite) with Objective-C so that the library can be imported into MonoTouch. I have created an Objective-C library and included the compiled C++ library in this project, <em>libulrt.a</em>. To get my project to compile I set the path to the <em>User Header Search Path</em> to point to the directory where the C++ header files are located. I then had to set <em>compile source as</em> to <em>Objective-C++</em>.</p> <p>The problem now is that, although the wrapper library compiles correctly, once I include it in another Xcode project I have to <strong>again</strong> set <em>compile source as</em> to <em>Objective-C++</em> otherwise the project consuming my wrapper library gives linking errors. I don't understand why this is, because the header file for my wrapper library contains only Objective-C code and not C++ code at all. C++ code is only found in the <em>implementation</em> (*.mm file) of the wrapper library. What do I need to do to make the C++ implementation completely transparent to the project consuming the wrapper library? In other words, I want to be able to include my wrapper library and compile with <em>compile source as</em> set to <em>Objective-C</em>. Anyone got any ideas how to do this? </p> <p>The linking errors that I am getting when compiling the project consuming my wrapper are as follows: (I have abridged the error listing because it is LONG!)</p> <pre><code>"operator delete(void*)", referenced from: zc3db40339fee::~zc3db40339fee()in libUltralite.a(ee39bf4763.o) zb4297ee7d543::~zb4297ee7d543()in libUltralite.a(747e80fdad.o) z33836a0a6f46::~z33836a0a6f46()in libUltralite.a(f240efda30.o) "___cxa_pure_virtual", referenced from: vtable for ze78b0ec59364in libUltralite.a(2c50e8e8ff.o) vtable for ze78b0ec59364in libUltralite.a(2c50e8e8ff.o) vtable for ze78b0ec59364in libUltralite.a(2c50e8e8ff.o) </code></pre> <p>The header file for my wrapper library is as follows:</p> <pre><code>#import <Foundation/Foundation.h> @interface DataAccess : NSObject {} // Release objects. - (void)dealloc; // Singleton instance of the DataAccess class. + (DataAccess*)sharedInstance; // Finalize the Database Manager when done with the DB. + (void)fini; // Adds the given name to the database. - (void)addName:(NSString *)name; @end </code></pre> <p>Anyone have any idea how I can compile this as Objective-C++ but still have the projects consuming this library see it as Objective-C?</p>

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