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-devand-dbgversions. e.g. packagezlib1g(runtime shared libs) haszlib1g-dev(dev files) andzlib1g-dbg(dev files, with debugging symbols). libstdc++ and various qt libs and boost and many others i (very briefly) checked all come with-dbgdebugging versions of the packages. all up, in debian sid, there are 2801 packages with-dbgversions (compared to 5734-devpackages)-dev,-dbg) are relative to the lib package, which is an optimized build. Therulesfile for the zlib1g .deb includes this:ifneq (,$(findstring noopt,$(DEB_BUILD_OPTIONS))) CFLAGS += -O0 else CFLAGS += -O3, which means it builds either one or the other. However, looking at the .deb binary package for GCC, there is a debug directory, with a libstdc++.so. I'll set up a Debian VM and take a better look at this. If it does include the non-optimized build, I can experiment on Debian, as it means I won't need to build GCC from source.-devanddbgpackages, I could confirm it includes both versions of libstdc++ (optimized and non-optimized). I'll try this on Debian, then.