Chris Vasiladiotis compor

What is the Strict Aliasing Rule and Why do we care?

(OR Type Punning, Undefined Behavior and Alignment, Oh My!)

What is strict aliasing? First we will describe what is aliasing and then we can learn what being strict about it means.

In C and C++ aliasing has to do with what expression types we are allowed to access stored values through. In both C and C++ the standard specifies which expression types are allowed to alias which types. The compiler and optimizer are allowed to assume we follow the aliasing rules strictly, hence the term strict aliasing rule. If we attempt to access a value using a type not allowed it is classified as undefined behavior(UB). Once we have undefined behavior all bets are off, the results of our program are no longer reliable.

Unfortunately with strict aliasing violations, we will often obtain the results we expect, leaving the possibility the a future version of a compiler with a new optimization will break code we th

Effective Modern CMake

Getting Started

For a brief user-level introduction to CMake, watch C++ Weekly, Episode 78, Intro to CMake by Jason Turner. LLVM’s CMake Primer provides a good high-level introduction to the CMake syntax. Go read it now.

After that, watch Mathieu Ropert’s CppCon 2017 talk Using Modern CMake Patterns to Enforce a Good Modular Design (slides). It provides a thorough explanation of what modern CMake is and why it is so much better than “old school” CMake. The modular design ideas in this talk are based on the book [Large-Scale C++ Software Design](https://www.amazon.de/Large-Scale-Soft

Vim+Zathura+Synctex

In a script called 'vimura':

#!/bin/sh
echo $1
zathura -s -x "gvim --servername $1 -c \"let g:syncpdf='$1'\" --remote +%{line} %{input}" $*

Jekyll & Liquid Cheatsheet

A list of the most common functionalities in Jekyll (Liquid). You can use Jekyll with GitHub Pages, just make sure you are using the proper version.

Running

Running a local server for testing purposes:

Git Submodules basic explanation

Why submodules?

In Git you can add a submodule to a repository. This is basically a repository embedded in your main repository. This can be very useful. A couple of usecases of submodules:

Separate big codebases into multiple repositories.

THIS GIST WAS MOVED TO TERMSTANDARD/COLORS REPOSITORY.

PLEASE ASK YOUR QUESTIONS OR ADD ANY SUGGESTIONS AS A REPOSITORY ISSUES OR PULL REQUESTS INSTEAD!

	// WARNING: only for x86

	#include <stdlib.h>
	#include <stdio.h>
	#include <unistd.h>
	#include <fcntl.h>
	#include <string.h>
	#include <assert.h>
	#include <time.h>
	#include <sys/auxv.h>

	Installing Ruby 2.0.0 on Kindle
	===============================

	So I've just jailbroken my Kindle, and want to run Ruby on it.
	This is what I have right now on my Kindle:

	* [KUAL](http://www.mobileread.com/forums/showthread.php?t=203326), the Kindle Unified Applications Launcher
	* [KTERM](http://www.fabiszewski.net/kindle-terminal/) with tmux

	Make sure you've also enabled `usbnetwork` so that you can SSH to your kindle via USB.

	# Compiled source #
	###################
	*.com
	*.class
	*.dll
	*.exe
	*.o
	*.so

	# Packages #

	//
	// Limits the maximal virtual memory of the process to half of the total
	// amount of RAM on the system.
	//
	// Linux only.
	//
	// Compilation:
	//
	// gcc -std=c11 -pedantic limit-virtual-memory.c -o limit-virtual-memory
	//