Dean Butcher ButchDean

How to Install Eccodes on Ubuntu

Eccodes is an open source library made by ECMWF for reading and writing grib files, which is the most common file format for meteorological und oceanographic data in operational use (while in research, Netcdf is mainly used). If one wants to work with grib files seriously, one will have to install it earlier or later. On top of that, one will also have to make sure C and Python code is able to import the library's functionality.

First of all, I would highly recommend not to use anything else than Linux, preferably Ubuntu, for working with meteorological data, especially grib files. If you do not want to migrate to Linux completely, consider either a dual boot or a virtual machine.

I just show you the commands with minimal explanation.

Installing an older version with apt

ANSI Escape Sequences

Standard escape codes are prefixed with Escape:

Ctrl-Key: ^[
Octal: \033
Unicode: \u001b
Hexadecimal: \x1B
Decimal: 27

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

If you are getting this in gdb on macOS while trying to run a program:

Unable to find Mach task port for process-id 57573: (os/kern) failure (0x5).
 (please check gdb is codesigned - see taskgated(8))

Open Keychain Access
In menu, open Keychain Access > Certificate Assistant > Create a certificate
Give it a name (e.g. gdbc)

Makefile cheat sheet

Mostly geared towards GNU make

I've used ->| to indicate a tab character, as it's clearer to read than ⇥

Set a target, its dependencies and the commands to execute in order

target: [dependencies]
-&gt;|

Note: these instructions are for pre-Sierra MacOS. Sierra (10.12) and newer users see https://gist.github.com/gravitylow/fb595186ce6068537a6e9da6d8b5b96d by @gravitylow

If you are getting this in gdb on OSX while trying to run a program:

	# References:
	# https://cmake.org/cmake/help/latest/command/add_custom_target.html
	# https://samthursfield.wordpress.com/2015/11/21/cmake-dependencies-between-targets-and-files-and-custom-commands/
	# https://gist.github.com/socantre/7ee63133a0a3a08f3990
	# https://stackoverflow.com/questions/24163778/how-to-add-custom-target-that-depends-on-make-install
	# https://stackoverflow.com/questions/30719275/add-custom-command-is-not-generating-a-target
	# https://stackoverflow.com/questions/26024235/how-to-call-a-cmake-function-from-add-custom-target-command
	# https://blog.csdn.net/gubenpeiyuan/article/details/51096777

	cmake_minimum_required(VERSION 3.10)

	// Made this code to change to fullscreen, useful if you're creating a DX application in vs2015/c++/uwp
	// Also look at this sample: https://github.com/Microsoft/Windows-universal-samples/tree/master/Samples/FullScreenMode/cpp
	// And this MSDN page: https://msdn.microsoft.com/en-us/library/windows/apps/windows.ui.viewmanagement.applicationview.preferredlaunchwindowingmode?cs-save-lang=1&cs-lang=cpp#code-snippet-1
	// preferred mode in constructor
	App::App()
	{
	// starts with this window size
	Windows::UI::ViewManagement::ApplicationView::PreferredLaunchViewSize= Windows::Foundation::Size(800,600);
	Windows::UI::ViewManagement::ApplicationView::PreferredLaunchWindowingMode = Windows::UI::ViewManagement::ApplicationViewWindowingMode::PreferredLaunchViewSize;
	}

	# Makefile for gtest examples

	GOOGLE_TEST_LIB = gtest
	GOOGLE_TEST_INCLUDE = /usr/local/include

	G++ = g++
	G++_FLAGS = -c -Wall -I $(GOOGLE_TEST_INCLUDE)
	LD_FLAGS = -L /usr/local/lib -l $(GOOGLE_TEST_LIB) -l pthread

	OBJECTS = main.o string-compare.o