Add support for libc++ unordered_map
Add support for libc++ unordered_set
libkern/OSAtomic.h only apply to Apple
Implement GetProcessExecutableFile() and GetModuleFile() for FreeBSD
Fix Platform/Threading on FreeBSD
Support structure packing for clang
#include <cstdlib> for std::abs()
Use C++ish way of pointer array zeroing
operator< should be constant
Place stub includes before everything
Link with libexecinfo on FreeBSD
Merge pull request #88 from AMDmi3/freebsd

Changes required to build recent spring on FreeBSD