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    <p>You may try to build a wrapper library around your 3rd party library: use the static version of that library + link it with the static standard library (-static-libgcc - make sure you pick up a proper version via -L). The important thing to do is to close this wrapper library properly, i.e only symbols from the original 3rd party library should be exported, everything else should be hidden. This way you wrapper library will expose all needed symbols for your application and encapsulate standard stuff inside. Note it is not guaranteed to work especially if some memory operations are shared between your code and 3rd party code (e.g. you allocate memory in your code and deallocate in 3rd party)... in such case the only option can be to keep this 3rd party lib in a different process space.</p> <p>I don't think the dynamic option mentioned above would work because you will get exactly same problem - just later.</p> <p>In general it is better not to mix binaries with different run-times in the same process space. It is almost always a recipe for disaster.</p>
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    1. POHow to build an application that requires both libstdc++.so.5 and libstdc++.so.6?
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    1. POHow to build an application that requires both libstdc++.so.5 and libstdc++.so.6?
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    1. COCan you explain how to properly hide the symbols, and what you're saying about the memory operations? We tried wrapping the 3rd party lib in functions that would use dlopen(lib, RTLD_LOCAL) to load the 3rd party lib. This kept our code from linking in .so.5, but, we suspected, that the 3rd party code was picking up symbols (like malloc) from the already loaded .so.6 (loaded by our code), and was causing memory leaks. We tried using LD_PRELOAD to loud the 3rdparty lib first, and the memory leaks pretty much went away.
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      1. USRichard Levasseur
    2. COAnd we _do_ allocate in on our side, and the 3rd party lib deallocates. e.g.: ThirdPartyStruct * foo = malloc(...); ThirdPartyApiCall(foo); ThirdPartyFreeStruct(foo); - Are you saying that just plain won't be possible if we're using .6, and its using .5? What if we used .5 with our wrapper functions, and did all allocation/deallocation through the wrapper lib?
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      1. USRichard Levasseur
    3. COWhen allocation/deallocaiton is performed in different standard libraries you cannot be sure that they do this in same way... you simply do not knoww. I can't say if it is a real problem on Linux but on Windows definitely it is: if you are using different runtimes in your libraries and do allocation in one and deallocation in other you will get a run-time exception. I wouldn't even consider mixing different standard libraries in your case, even if it works on this particular platform with these particular runtimes you cannot be sure it will work when you move to a new version of libstd...
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