Recherche avancée

Sur d’autres sites (4972)

• How Many Default Languages ?

  26 janvier 2012, par Multimedia Mike — Programming

  I was thinking back to my childhood, when my family first owned a computer. It was an MS-DOS-powered IBM PC. The default OS came with 2 programming environments, such as they were : GW-BASIC and batch files. It was a start, I suppose. I guess most any microcomputer you can name from that era came with some kind of BASIC interpreter. That defined the computer’s “out of the box” programmability.

  Then I started wondering how this compares to computers (operating systems/distributions, really) these days. So I installed a fresh version of the latest Ubuntu Linux version (11.10 as of this writing ; x86_32) and looked for programmability (without installing anything else). This is what I came up with :

  1. gcc/C (only the C compiler ; other components of the GNU compiler collection are installed separately)
  2. Perl
  3. Python
  4. C#, as furnished by Mono
  5. Bash — can’t forget about the shell as a full-featured programming language (sh is also present, but not t/csh)
  6. JavaScript — since Firefox is installed per default, JS counts
  7. GNU Assember — thanks to Reimar for the reminder that if gcc is present, gas necessarily needs to be there as well

  I checked on C++, Objective C, Java, Ada, Fortran, Go, Lua, Ruby, Tcl, PHP, R and other languages I could think of, but the above items were the only ones present by default. At the same time, I checked my Mac OS X (10.6) box and it also has Ruby and PHP installed. It has a bunch of other languages, courtesy of Xcode, so I can’t certify anything about its out of the box programmability.

  Still, I think “embarrassment of riches” pretty well sums it up. I try not to be crotchety old fogey complaining that kids these days don’t know how good they have it ; rather, I’m genuinely excited for anyone who wants to leap into computer programming in this day and age.

• script ubuntu lucid : x264

  4 mars 2012

  Dans le log du script d’installation j’ai cette erreur :

  Téléchargement, compilation et installation de x264

  1. Initialized empty Git repository in /usr/local/src/x264/.git/
  2. Package x264 was not found in the pkg-config search path.
  3. Perhaps you should add the directory containing `x264.pc’
  4. to the PKG_CONFIG_PATH environment variable
  5. No package ’x264’ found

  Télécharger

  si je tape "echo $PKG_CONFIG_PATH" j’ai une ligne vide

  je suppose que la suite est en rapport :

  1. Makefile :3 : config.mak : Aucun fichier ou dossier de ce type
  2. cat : config.h : Aucun fichier ou dossier de ce type
  3. ./configure
  4. Found yasm 0.8.0.2194
  5. Minimum version is yasm-1.0.0
  6. If you really want to compile without asm, configure with —disable-asm.
  7. make : *** [config.mak] Erreur 1
  8. Found yasm 0.8.0.2194
  9. Minimum version is yasm-1.0.0
  10. If you really want to compile without asm, configure with —disable-asm.

  Télécharger

• avformat/matroskaenc : Improve writing Projection

  1er janvier 2020, par Andreas Rheinhardt

  avformat/matroskaenc : Improve writing Projection
  The Matroska Projection master element has such a small maximum length
  
  that it can always be written with a length field of length one.
  
  So it is unnecessary to first write the element into a dynamic buffer to
  
  get the accurate length in order not to waste bytes on the length field.
  Signed-off-by : Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
  
  Signed-off-by : James Almer <jamrial@gmail.com>
  

  • [DH] libavformat/matroskaenc.c