Difference between revisions of "D"

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== Installation ==
 
== Installation ==
To program in D you will need two things - a D compiler and a library. Easiest way to get started fast is to install {{Grp|dlang-dmd}} package group. It will provide the official compiler ({{Pkg|dmd}}), standard lbrary {{Pkg|libphobos-devel}} and collection of small development tools {{Pkg|dtools}}.
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To program in D you will need two things - a D compiler and a library. Easiest way to get started fast is to install {{Grp|dlang-dmd}} package group. It will provide the official compiler ({{Pkg|dmd}}), the standard lbrary {{Pkg|libphobos}} and {{Pkg|dtools}}, a collection of small development tools.
  
 
== Testing the installation ==
 
== Testing the installation ==
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There are however possible choices regarding the compiler you choose. The standard (reference one) is dmd, but {{AUR|gdc}} (GNU D Compiler) and {{Pkg|ldc}} (LLVM D Compiler) are also popular. Those are also in [community].
 
There are however possible choices regarding the compiler you choose. The standard (reference one) is dmd, but {{AUR|gdc}} (GNU D Compiler) and {{Pkg|ldc}} (LLVM D Compiler) are also popular. Those are also in [community].
  
The main difference is that the dmd's back end is not FOSS (licensed from Symantec), while the others compilers are completely FOSS. All 3 compilers share same front-end code and thus have almost identical support for language features (assuming same front-end version).
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As of April 2017 [https://github.com/dlang/dmd/pull/6680 dmd's backend is now FOSS] (Boost-licensed). All 3 compilers share same front-end code and thus have almost identical support for language features (assuming same front-end version).
 
 
== hardening-wrapper ==
 
 
 
In Arch Linux {{Pkg|dmd}} and {{Pkg|libphobos}} packages are built without PIC support.
 
Using {{Pkg|hardening-wrapper}} forces building executables with PIC support which results in:
 
 
 
dmd app.d
 
/usr/bin/ld: app.o: relocation R_X86_64_32 against  `__dmd_personality_v0' can not be used when making a shared object;  recompile with -fPIC
 
app.o: error adding symbols: Bad value
 
collect2: error: ld returned 1 exit status
 
--- errorlevel 1
 
 
 
There are few possible workarounds:
 
 
* uninstall {{Pkg|hardening-wrapper}}
 
* use {{AUR|gdc}} compiler which is compiled with PIC support
 
gdc app.d
 
or for {{Pkg|dub}}
 
dub --compiler=gdc
 
* recompile {{Pkg|dmd}} and {{Pkg|libphobos}} with -fPIC flags using [[abs]] or manually
 
* use clang linker
 
CC=/usr/bin/clang dmd app.d
 
if using dub
 
CC=/usr/bin/clang dub
 
 
 
more information
 
* https://issues.dlang.org/show_bug.cgi?id=15054
 
* {{Bug|34983}}
 
* {{Bug|46260}}
 
* http://wiki.dlang.org/Installing_LDC_on_Gentoo#Hardened_Gentoo
 
  
 
== Useful libraries and bindings ==
 
== Useful libraries and bindings ==

Latest revision as of 13:00, 18 September 2017

From Wikipedia:D (programming language):

"The D programming language, also known simply as D, is an object-oriented, imperative, multi-paradigm system programming language by Walter Bright of Digital Mars. It originated as a re-engineering of C++, but even though it is predominantly influenced by that language, it is not a variant of it. D has redesigned some C++ features and has been influenced by concepts used in other programming languages, such as Java, C#, and Eiffel".

Installation

To program in D you will need two things - a D compiler and a library. Easiest way to get started fast is to install dlang-dmd package group. It will provide the official compiler (dmd), the standard lbrary libphobos and dtools, a collection of small development tools.

Testing the installation

To make sure that everything is installed and set up correctly, a simple Hello World program should suffice.

import std.stdio;

void main() {
   string yourName = "archer";
   writefln("Hello %s!", yourName);
}

Paste the code into a file, name it hello.d, and run

$ dmd hello.d

in the same directory as the file. You should then be able to execute the program with:

$ ./hello

You can also execute

$ dmd -run hello.d

which will simply compile and run without leaving any object files in the directory.

Considerations

There are however possible choices regarding the compiler you choose. The standard (reference one) is dmd, but gdcAUR (GNU D Compiler) and ldc (LLVM D Compiler) are also popular. Those are also in [community].

As of April 2017 dmd's backend is now FOSS (Boost-licensed). All 3 compilers share same front-end code and thus have almost identical support for language features (assuming same front-end version).

Useful libraries and bindings

  • DDT - Eclipse plugin for project and code management in D
  • Mono-D - MonoDevelop addin for programming in D
  • QtD - Qt bindings for D
  • GtkD - An object oriented GTK+ wrapper for D
  • Derelict - Bindings for multimedia libraries, focused toward game development
  • Deimos - A project that houses a lot of bindings to different C libraries

See Also