Bug 1276827

Summary: OpenMP support for Clang/++
Product: [Fedora] Fedora Reporter: Darcy <darcy>
Component: llvmAssignee: Jan Včelák <jv+fedora>
Status: CLOSED DUPLICATE QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: medium Docs Contact:
Priority: unspecified    
Version: 23CC: ajax, bos, darcy, dmalcolm, jv+fedora, petersen, scottt.tw, zeekec
Target Milestone: ---   
Target Release: ---   
Hardware: x86_64   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Enhancement
Doc Text:
Feature: OpenMP support
 Story Points: ---
Clone Of: Environment:
Last Closed: 2016-06-05 14:24:43 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Description Flags
Test case none

Description Darcy 2015-10-31 01:35:13 UTC 
Description of problem:
No OpenMP headers or libomp included with the Clang/++ compiler in the Fedora package.

Version-Release number of selected component (if applicable):
3.5 and tested on 3.7.

How reproducible:
Trivial. 

Steps to Reproduce:
1. Write some code with a #pragma omp parallel section
2. Compile using clang -fopenmp main.cpp -o test.out
3. Terminal output does not generate multiple threads

Actual results:
Only one thread prints out test message

Expected results:
Multiple threads print out hello world

Additional info:
The clang compiler links against gomp (checked using ldd).  There is no header in the default clang include directory.  Same steps work with g++.
Comment 1 Darcy 2015-11-07 02:26:42 UTC 
Created attachment 1090820 [details]
Test case

Compile with clang++ -fopenmp main.cpp  - expected output to be a hello from each thread.
Comment 2 Darcy 2016-03-09 06:15:15 UTC 
With the release of LLVM 3.8, Clang now has in tree OpenMP: http://llvm.org/releases/3.8.0/tools/clang/docs/ReleaseNotes.html#openmp-support-in-clang

Are there plans to include this in F23?
Comment 3 Darcy 2016-03-09 23:32:50 UTC 
To try and move this a little higher up on the priority list, I wrote a poem called Please.

Up until now I've kept my peace
Politely waiting for you to release
Doth message to proclaim the maintainer is not dead
As at all costs I must use all my threads
That is the dream to you I implore
Except I sit here #pragma omp parallel wait for

Close the bug, another is done
Lest we forget cryptic compiler error fun
All and all g++ is sublime
Nevertheless in the repos it is Clang 3.8 I want to find
Good effort and my thanks to you, I hope to see it very soon!
Comment 4 Jan Včelák 2016-06-05 14:24:43 UTC 
This is basically a new package request.

I like your poem. Hope you will like my new package request (bug #1342815).

*** This bug has been marked as a duplicate of bug 1342815 ***