New UNUSABLE_MMAP code path for platforms that cannot use the required flags (Xbox 360, Symbian). Falls back to malloc() instead.
N1 define for compilers (GCCE) that don't like to assume (int)-1 will safely cast to (char)-1.
Miscellaneous space->tab fixes.
Add missing #include to various files.
strings.h isn't provided by MSVC so we don't include it there; it's needed
for other OSes/compilers.
Get rid of pre-ISO-C malloc.h includes; malloc is provided by stdlib.h.
Fixes some linuxisms.
Prepend __builtin_ to __clear_cache, calling it without the prefix is a
GNU extension.
