aws_string_c_str() helper fn

v0.4.15

aws_string_c_str() (#534)

Fix alignment on Windows

v0.4.14

Remove AWS_ALIGN, as it doesn't work reliably, add AWS_ALIGNED_TYPEDE…

Added ring_buffer allocator, AWS_UNREACHABLE

Imported ring buffer allocator from node CRT (#527)

* Imported ring buffer allocator from node, fixed bugs, added unit test

* Implemented realloc as an assert to prevent use

Fixed visibility on static libs, added secure string length functions, fixed buffer overflow vulnerability in stack trace printing.

v0.4.12

Don't set fvisibility on static libs. (#516)

Fixed bug in AWS_ASSUME on gcc.

Fix stupid bad boolean logic in macro. (#508)

* Fix stupid bad boolean logic in macro.

* simplified gcc macro for assume.

fixed gcc 4.1.2 builds

Fixed support for gcc 4.1.2. (#507)

* Fixed support for gcc 4.1.2.

fixed mixed static/shared builds.

v0.4.9

Reorder thread shutdown so that only truly necessary memory is still …

Made AWS_ENABLE_LTO an option

AWS_ENABLE_LTO=ON|OFF now controls LTO globally (#504)

* AWS_ENABLE_LTO=ON|OFF now controls LTO globally

* Made AWS_ENABLE_LTO an option

Added support for thread exit callbacks

Added support for thread exit callbacks (#503)

* Added support for thread exit callbacks

* Added user data support to aws_thread_call_once

LTO support for Clang/GCC

LTO support (#499)

* Added IPO/LTO support to cmake

* Removed the requirement that release builds produce good backtrace output

* Check for IPO policy in older versions of CMake

* Add policy existence check to c flags