• 0

Compiling pthread program


Question

Hello, I am trying to compile a simple C program that uses pthreads. It's one of the tutorial examples at https://computing.llnl.gov/tutorials/pthreads , more precisley this : https://computing.llnl.gov/tutorials/pthrea...mples/condvar.c

First I tried it with Code::Blocks in my Ubuntu VM, but Code::Blocks says pthread is an undefined reference and when I try to open the include file (by right clicking <pthread.h> and clicking "open file" or something like that), it says the file can't be found. So I guess Code::Blocks doesn't know where it is. Furthermore, I tried the same with stdlib.h and others and it can't open any of them. How can I configure it so that it compiles properly ? I just created an empty C++ project and copy-pasted the code in main.cpp.

Next I tried in Visual Studio 2008 under Windows. Now, VS can open all the other include files alright, but not pthread.h, and upon compilation it will complain that it cannot open include file 'pthread.h'. A quick search on Google gives very little insight.

I just want to compile and run the damn thing, any environment/editor will do ! Thanks for your help.

Link to comment
https://www.neowin.net/forum/topic/749278-compiling-pthread-program/
Share on other sites

7 answers to this question

Recommended Posts

  • 0

Just to add to my previous post :

Under Code::Blocks, although I cannot open any include file, programs that use standard C and C++ librairies run fine. Such as iostream and stdlib Hello Worlds.

The errors I get are all "undefined reference to 'pthread_create'.

I have tried adding -lpthread to the compiler options, but it didn't fix the problem.

  • 0

So in my stubberness, I managed to make the program compile under Code::Blocks. It involved adding the "pthread" library in the linker settings.

I still wonder if it's possible to do it under Visual Studio.

EDIT: just tried it with Code::Blocks under Windows this time. Adding the pthread library does absolutely nothing this time. Also, Code::Blocks seems to work more sensibly under Windows, for instance it opens include files correctly. But it won't open pthread.h, just like Visual Studio.

Edited by Dr_Asik
  • 0

Yeah you need to include pthread in the linker stage. I've used pthreads before but only under Linux and it's a bit different to how I included the library the last time I used it.

I use Dev C++ as my IDE and I first created a C project. I think it's still possible to do it under Visual

Studio though but I don't have any experience with it. Before getting it to work in Dev I downloaded the pthreads library from here. Looking at the read me

  Quote
Which of the several dll versions to use?

-----------------------------------------

or,

---

What are all these pthread*.dll and pthread*.lib files?

-------------------------------------------------------

Simple, use either pthreadGCv.* if you use GCC, or pthreadVCv.* if you

use MSVC - where 'v' is the DLL versioning (compatibility) number.

Otherwise, you need to choose carefully and know WHY.

So I then copied the header files (pthread, sched and semaphore) to the dev include library and put the pthreadGC2.dll in my project folder where the .exe will be created.

In Dev I then added -lpthreadGC2 at the linker stage and it compiled OK. Hope this helps.

edit: Never even noticed Mike got a post in before me :laugh:

Edited by ViZioN
  • 0

Visual Studio is a C++ compiler, I don't even think it is fully C89 compliant. But most new C99 features will not work in VS 2008, they are trying to follow C++ standards not C, any C code you should compile with GCC (MinGW32 on windows). Make sure to link any libraries supplied with the code, and a direct reference to the header file "pthread.h" should be made, not <pthread.h>.

  • 0
  chhavi said:
Hello,

I am using CodeBlocks and getting problem in the compilation of a thread program. It says "can not find pthread.h"

I tried adding "pthread" in the linker settings, still fails. Could you please let me know the solution to this problem.

Thanks in advance.

Follow my post above exactly. It was for Dev C++ not Code::Blocks but the process should be almost identical.

This topic is now closed to further replies.
  • Recently Browsing   0 members

    • No registered users viewing this page.
  • Posts

    • Microsoft SharePoint gets Modern Page Templates to speed up page creation by Paul Hill SharePoint, Microsoft’s enterprise content management solution that allows organizations to set up internal pages and share documents, has just got a big update with the new Modern Page Templates. Microsoft said that it’s going to be rolling out the feature to customers globally between early July and early August. Organization members that want to set up pages on SharePoint using the new templates can do so from multiple entry points including the Site Home (the home of a Communication or Teams site), App Bar (the persistent navigation pane on the left of SharePoint), and the New Web Part (a webpart that displays and creates news posts directly on pages). By giving colleagues multiple access points to the new templates, there’s more chance they’ll be found and used. By including plenty of swanky templates, Microsoft is making it so you can spend less time designing pages, and more time filling them with content that really matters. If you want to create a new page using the templates, just go to New > Page and select a template “From Microsoft”. If you were making a news post, you would go to New > News post then you’d be presented with the new Template Gallery where you can select a custom template created by your colleagues under “Saved on this site”. While these new templates are coming to customers globally next month, Microsoft is already busy working on new features to make templates easier to discover and make them more useful. For example, it is building tenant-wide custom templates that can be published across sites for organization-wide use, and it’s working on Copilot templates that you can use when creating pages with Copilot. Neither of these features was given a release timeline. Customers won’t need to do anything to start using Modern Page Templates as they’ll be available automatically as it rolls out worldwide across tenants. For those who want to dive deeper, Microsoft will be publishing additional documentation and guidance about this feature soon.
    • Times are changing: https://arstechnica.com/gaming...ndows-11-ars-testing-finds/
    • Unless there is “bug” that all of a sudden sends your messages to Meta. Where have I heard this before?!
    • Maybe, just maybe... and it isn't you... there are some people who like the Windows 11 UI (for whatever reason) and want a better backend.
    • Gundams to arrive in Call of Duty: Mobile with new mech mode and unique third-person combat by Paul Hill Activision has announced that Call of Duty: Mobile will see the launch of Season 6 “Gundams Arrive” on July 2 at 5PM Pacific Time. This major collaboration between the world’s most popular FPS franchise and the Gundam franchise will introduce a new, limited-time mode called Gundam Team Deathmatch where 8 players will face off 4v4 and pilot Gundam-themed operators such as Ethan - Freedom Gundam, Reaper - Sazabi Gundam, Proton - v Gundamo, Deathscythe Gundam (EW). When playing in this game mode, players will notice a switch from the usual first-person view to the third-person perspective. The new game mode will also feature specific abilities and weapons that are unique to Gundam suits rather than player loadouts. The new Gundam Team Deathmatch mode will be played on a new map called interstellar space station, which has been designed for this mode. When playing, you’ll discover that the mech suits offer specialized mobility such as dodge, sprint, and vertical jets. In the post-match, players will be able to watch Gundam operator animations with unlockable rewards for viewing. You can unlock more animations by participating in Gundam Team Deathmatch, normal Multiplayer, and Battle Royale modes. There will also be Gundam-themed in-game events, such as Survival of the Fittest, which will give players free rewards like the new legendary weapon J358 — Fin Funnel v Gundam, Urban Tracker — Defense Force, Cyro Bomb — Haro (reskin), Emote — Haro Team, new camos, and more. Players will also be able to obtain a variety of items through Season 6 Battle Pass free and premium tiers, including sci-fi-themed Operators and Weapon Blueprints. Players on the free tier will get access to the bolt-action 3-Line Rifle based on a World War II design and is capable of inflicting high damage with high accuracy. Free tier players will also have the chance to earn other rewards such as Skins, Weapons Blueprints, Vault Coins, and more. Players looking to spend money can get the Premium Pass. These players will have a chance to get all of the content from Season 6 including tactical warriors like Silver — Chrome Dome Reskin, Misty — Science Pilot, Atlas — Dust Ranger, and The Marshal — Rock Hound; and Weapon Blueprints like the BP50 — Pathripper, Oden — Maevwat Technical, PDW-57 — Rocket Re-Entry, BY15 — Dark Moon, and the 3-Line Rifle — Geo Thermal Line, based on the new Season 6 weapon. There’s also Battle Pass Subscription which gives you additional monthly rewards along with a 10% boost to Player and Weapon XP, discount coupons, and limited discounts on 10x crate pulls. Activision also stated that Mythic Drops are returning to the Mythic store and that Battle Pass Vault is getting Season 9 — Zombies Are Back (2022) and Season 6 — Templar's Oath (2023).
  • Recent Achievements

    • Week One Done
      pcdoctorsnet earned a badge
      Week One Done
    • Rising Star
      Phillip0web went up a rank
      Rising Star
    • One Month Later
      Epaminombas earned a badge
      One Month Later
    • One Year In
      Bert Fershner earned a badge
      One Year In
    • Reacting Well
      ChrisOdinUK earned a badge
      Reacting Well
  • Popular Contributors

    1. 1
      +primortal
      546
    2. 2
      ATLien_0
      205
    3. 3
      +FloatingFatMan
      173
    4. 4
      Michael Scrip
      150
    5. 5
      Som
      129
  • Tell a friend

    Love Neowin? Tell a friend!