SetFlags.cmake
Add -lexecinfo to linker flags for FreeBSD to resolve backtrace()
lib/sqlite/CMakeLists.txt
Define _XOPEN_SOURCE to 600 instead of __POSIX_VISIBLE to 200112 for
POSIX 1-2001 support. For POSIX standards, the _XOPEN_SOURCE define
controls the eventual value of __POSIX_VISIBLE. _XOPEN_SOURCE is defined
to 500 in sqlite.c if not already defined, which sets up _POSIX_C_SOURCE
and __POSIX_VISIBLE to the 199506 for POSIX.1c
lib/tolua++/CMakeLists.txt
src/CMakeLists.txt
Add /usr/local/lib to the library search path for FreeBSD builds
src/OSSupport/Errors.cpp
Correct the strerror_r() implementation determination to check whether
_GNU_SOURCE is defined, not what it evaluates to
