@Suiseiseki I personally do use whatever default malloc on target platform is, in which case the licensing doesn't play any role (as GPL explicitly refers to it as "System Libraries").

However, I'm more interested in hearing the reasons why somebody decides not to rely on it and use thirdparty implementation. Having same algorithm, yeah, that could work. Even if GC but again, can't see how existing software written in C should even rely on that.