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69a04be353
This requires a std::locale generated from a boost::locale::generator The examples already in our code base used the wrong message_path while creating the generator and as a result our message catalogs weren't found. As with the std::locale I have added code to create a locale via boost::locale only once instead of having each c++ file redo the work. This code expects a message_path to set for the boost generator. An earlier attempt queried for this path directly from within gnc-locale-utils using gnc_get_locale_dir (from gnc-path.h). That however broke several c++ tests depending on gnc_locale_utils as those then also needed to be linked against gnc-path.o. I couldn't get the linker to do this properly so I worked around it for now by splitting the boost_locale functionality in two steps: - an initializer step that takes the messages_path as a string and will generate the locale - a getter to get the locale. The initializer should only be run once, and before the getter is called. It won't hurt though if the initializer is called more often. If the getter is called before the initializer it will still generate a std::locale but without setting a messages_path. It will then also log a warning explaining translations may not be properly found.