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First of all, you will also need a recent C++ compiler, where recent
-means that the compilers are close to C++ standard conforming (gcc 3.x).
+means that the compilers are close to C++ standard conforming (gcc 4.x).
LyX 1.6.x makes great use of C++ Standard Template Library (STL).
This means that gcc users will have to install the relevant libstdc++