* Patrick Palka via Gcc-patches: > This patch moves the global object for constructing the standard streams > out from <iostream> and into the compiled library on targets that support > the init_priority attribute. This means that <iostream> no longer > introduces a separate global constructor in each TU that includes it. > > We can do this only if the init_priority attribute is supported because > we need to force that the stream initialization runs first before any > user-defined global initializer in programs that that use a static > libstdc++.a.
I think this breaks initialization of iostreams of shared objects that are preloaded with LD_PRELOAD. With the constructor, they initialize iostreams once they are loaded via their own ELF constructors (even before libstdc++'s ELF constructors run). Without the constructor in <iostream>, that no longer happens. Thanks, Florian
