Hopefully Unkillable Stack

This is a generalized stack container header-only library in C with additional debug options like hash calculation, canaries and elem/ptr poison.

Debug options that could be enabled with macro

Debug flag/option	description	traits
`STACK_USE_POISON`	enables poisoning (filling with predefined value) of stack data	[SLOW]
`STACK_USE_PTR_POISON`	enables poisoning of structural pointers
`STACK_USE_CANARY`	enables canaries (arrays of predefined 64bit values on both sides of data) constance of which is checked
`STACK_USE_STRUCT_HASH`	enables hash calculation of structural values of the stack structure, like capacity, value count etc.	[REQUIRES_SSE4.2]
`STACK_USE_DATA_HASH`	enables calculation of bitwise hash of data	[SLOW] [REQUIRES_SSE4.2]
`STACK_USE_CAPACITY_SYS_CHECK`	enables system capacity correctness check (via `malloc_usable_size()` in unix or `_msize()` in windows)	[OS_DEPENDENT]
`STACK_USE_PTR_SYS_CHECK`	enables system pointer correctness check	[SLOW] [OS_DEPENDENT]
`STACK_VERBOSE 2`	sets the level of log verbosity from 0 to 2; if not defined eq. 0

$ mkdir build
$ cd build
$ cmake .. -D CMAKE_CXX_FLAGS="${CMAKE_CXX_FLAGS} -D STACK_USE_PTR_POISON -D STACK_USE_DATA_HASH -D STACK_VERBOSE=2"
$ make

$ mkdir build
$ cd build
$ cmake .. -DCMAKE_BUILD_TYPE=FULL_DEBUG
$ make

$ mkdir build
$ cd build
$ cmake .. -DCMAKE_BUILD_TYPE=Release
$ make