> using -Bsymbolic ensures that whenever the libpng library makes a call to > one of its own functions, the symbol is resolved internally instead of to > another version of libpng that's loaded. This may account for a majority > of the segfaults that people are seeing. It does not affect how symbols > are resolved when something /outside/ of libpng tries to call a function > belonging to libpng. That's why I said that all libraries that use libpng must also use -Bsymbolic. For programs -Bsymbolic has no effect since they are the first element in the search list (so they automatically work correctly).
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