Developer Tools

Last month I attended the ISO standardisation meeting for C++ in Urbana-Champaign. As usual I spent most of the week in the Library Working Group or Library Evolution Working Group. In LWG, about half the week was spent processing comments received from National Bodies during the ballots for the Technical Specification (TS) on C++ Extensions for Parallelism and the TS for C++ Extensions for Library Fundamentals, both of which were at the PDTS (public draft) stage. LWG reviewed some changes...

Several Red Hat engineers attended the JTC1/SC22/WG21 C++ Standards Committee meetings in November 2014 at Urbana-Champaign, IL, USA. This post focuses on the sessions of SG1, the study group on parallelism and concurrency, which met for the whole week to discuss proposals and work on the technical specifications (TS) for both parallelism and concurrency. SG1 mostly worked on finalizing the first revision of the Parallelism TS, and continued working on accepting proposals into the Concurrency TS. The Transactional Memory proposal...

The Red Hat toolchain team was well-represented at the Fall 2014 meeting of the standardization committee (JTC1/SC22/WG21) in Urbana-Champaign, IL, USA. In this article, Jason Merrill summarizes the main highlights and developments of interest to Red Hat Enterprise Linux developers. Stay tuned for separate articles summarizing the library and concurrency working group aspects. The fall meeting of WG21 (the C++ standardization committee) this year was hosted by the CS department at the University of Illinois at Urbana-Champaign. This was the...

Introduction Since their 4.8 version, the C and C++ compilers of the GNU Co mpiler Collection are equipped with built-in memory and data race errors detectors named Address Sanitizer and Thread Sanitizer. This article intends to quickly walk you through the highlights of these two interesting tools. Spotting common memory access errors ... When instructed to compile a given program, the Address Sanitizer sub-system of GCC emits additional code to instruments the memory accesses performed during the program's execution. Later...

memstomp is an interposition library to detect cases where applications may exhibit undefined behaviour when calling routines within the C library (glibc). The first version of memstomp was focused on detecting cases where source and destination memory regions passed to C library routines such as memcpy overlapped in ways not allowed by the ISO C standard. Matt Newsome's blog post shows how to utilize memstomp to find that class of bugs. For many years, GCC has attempted to eliminate unnecessary...

In this article, we'll take a look at the OpenMP parallel programming extensions to C, C++ and Fortran - OpenMP 4.0. These are available out of the box in GCC v4.9.1, available to Red Hat Enterprise Linux developers via Red Hat Developer Toolset v3.0 (currently at beta release). For a thorough backgrounder in parallelism and concurrency programming concepts, see Torvald Riegel's earlier articles ( part 1 and part 2). In this article, we'll instead dig into the nuts and bolts...

(Part 1)In this session, we'll cover when developers should use Red Hat Enterprise Linux system tools, when they should use the Red Hat Developer Toolset, and when they should use Red Hat Software Collections. We'll describe the developer tools for Red Hat Enterprise Linux and make recommendations in context, based on the type of application and the application life cycle. Well also explain the targeted audience for the native system tools and why they are not appropriate for all applications...

If you've done any C or C++ development on Fedora or Red Hat Enterprise Linux (RHEL), you'll have used GCC, the GNU Compiler Collection. Red Hat has long been a leading contributor to GCC, and this continues as we work with others in the "upstream" GCC community on the next major release: GCC 5. In this post I'll talk about some of the deep architectural changes I've been making to GCC. You won't directly see these changes unless you look...

Today, Red Hat is pleased to announce the beta availability of Red Hat Developer Toolset (DTS) 3.0 and Red Hat Software Collections (RHSCL) 1.2. New additions in this beta release include: Red Hat Developer Toolset 3.0. This update brings the Red Hat Developer Toolset with GCC 4.9 and Eclipse 4.4 (Luna) IDE to Red Hat Enterprise Linux 7 for the first time and gives C and C++ developers the ability to compile once and deploy to multiple versions of Red...

In June, Red Hat engineers Jason Merrill, Torvald Riegel and Jonathan Wakely attended the ISO C++ standards committee meeting, held in Rapperswil, Switzerland. This post contains reports on the core language work by Jason, and the library work by Jonathan. Torvald's report out on Parallelism and Concurrency is here. The next C++ meeting will be November 3-8 at the University of Illinois in Urbana-Champaign. Core (Jason) Because the C++14 standard ballot is still open we weren't supposed to make any...

Recently Red Hat sent several representatives to the JTC1/SC22/WG21 C++ Standards Committee meetings, which were held in June 2014 at the University of Applied Sciences in Rapperswil, Switzerland. As in past ISO C++ meetings, SG1, the study group on parallelism and concurrency, met for the whole week to discuss proposals and work on the technical specifications (TS) for both parallelism and concurrency. The Parallelism TS seems ready for a first publication soon. SG1 renamed the execution policy that allows vector...

Debugging software is something akin to an art form but, regardless of the approach you prefer, having good information on what's happening in your application is key. ltrace is one tool you may wish to add to your belt - a debugging tool that attaches to a running process, and prints to the terminal or a log file the library calls and/or system calls made by that process. In both its mode of operation and command line interface, ltrace is...

Now that Red Hat Enterprise Linux 7 is publicly available, we thought RHEL application developers would be interested in seeing how the new C/C++ toolchain compares to the equivalent in Red Hat Enterprise Linux 6 in terms of raw performance. The numbers are pretty surprising so stay tuned. But first, a little introduction to set the scene. Red Hat Enterprise Linux 6 GCC Red Hat Enterprise Linux 6 shipped in November 2010 with gcc-4.4. As with all major new versions...

Red Hat has just expanded the number of Red Hat Enterprise Linux subscriptions that include Red Hat Developer Toolset (DTS). Of note, both the Standard and Premium editions of Red Hat Enterprise Linux Server and Red Hat Enterprise Linux Workstation now include Red Hat Developer Toolset. Red Hat Developer Toolset is available to customers and partners using Red Hat Enterprise Linux 5 or 6 via the following subscriptions: Red Hat Enterprise Linux Servers and Workstations subscriptions: Red Hat Enterprise Linux...

Red Hat has actively participated in the ISO group defining the C++ standard for many years, and continues to make a significant contribution. The Red Hat toolchain team was well-represented at the February 2014 meeting of the standardization committee (JTC1/SC22/WG21) in Issaquah, WA, USA. In this article, Jason Merrill summarizes the main highlights and developments of interest to Red Hat's customers and partners: In February, Red Hat sent three engineers to the C++ standards committee meeting in Issaquah, WA. The...

Christian Aubry of Red Hat partner and Montreal-based Savoir-faire Linux (savoirfairelinux.com), interviews Red Hat's Langdon White (PyCon, April 2014) who provides a great introduction (6:31 minutes) of Software Collections, Developer Toolset, and the related connections to Red Hat OpenShift. {"preview_thumbnail":"/sites/default/files/styles/video_embed_wysiwyg_preview/public/video_thumbnails/0lcK8L3XDek.jpg?itok=-EjBiQrs","video_url":"https://www.youtube.com/watch?v=0lcK8L3XDek?feature=player_detailpage&w=640&h=360","settings":{"responsive":true,"width":"854","height":"480","autoplay":false},"settings_summary":["Embedded Video (Responsive)."]} Merci, Christian!

Red Hat Developer Toolset 2.1 and Red Hat Enterprise Linux 7 Beta You want agile, stable, and frequently updated development tools that make it easier to build innovation into your next-generation applications. That’s what you’ll find in Red Hat® Developer Toolset 2.1. Red Hat Developer Toolset 2.1 delivers the latest stable versions of essential development tools, on a separate life cycle, and with more frequent releases. And executables built with the Red Hat Developer Toolset toolchain can be deployed and...

We've just over a month to go until Red Hat Summit 2014 and the newly rebranded DevNation conference open their doors in San Francisco's Moscone Center South, located in the heart of downtown San Francisco. While we're putting the finishing touches to our great new product releases for developers, we're also really looking forward to attending the conferences ourselves. They present a great opportunity for like-minded developers to come together, see what's new and share ideas - all part of...

Now that we have Developer Toolset 2.1 released (with the newly added Git and support for targeting RHEL7 beta), it's time for us to focus on Developer Toolset 3.0. What would you like to see get added? Please spend a moment of time and fill out this quick survey form. Thank you!

Red Hat is pleased to announce the general availability of Red Hat Developer Toolset 2.1. This latest version bridges development agility with production stability by delivering the latest stable versions of essential open development tools to enhance developer productivity and improve deployment times. Red Hat Developer Toolset 2.1 introduces a new tool to its content set – Git 1.8.4 – and updates key packages to help developers deliver new applications and functionality faster. Red Hat Developer Toolset enables C and...

Modern computer systems include cache memory to hide the higher latency and lower bandwidth of RAM memory from the processor. The cache has access latencies ranging from a few processor cycles to ten or twenty cycles rather than the hundreds of cycles needed to access RAM. If the processor must frequently obtain data from the RAM rather than the cache, performance will suffer. With Red Hat Enterprise Linux 6 and newer distributions, the system use of cache can be measured...

For the last couple of years, Red Hat has presented Red Hat Developer Toolset features, roadmaps and demonstrations at Red Hat Summit and co-located developer events. This year, we'll be attending both Red Hat Summit and DevNation, both of which are happening slightly earlier in the year, in April (13-17 to be exact) at San Francisco's Moscone Center. I'll be attending and showing audiences the Red Hat Developer Toolset 2.1 update, complete with video demonstrations so you can see as...

One of the really useful tools provided by Red Hat Developer Toolset v2.x is " memstomp", which helps you identify a particularly nasty class of bug in applications built (directly or indirectly) from C/C++ code so you can then fix them before your customers experience problems. In this brief article, I'll explain the background for the tool, how to get it, how to use it yourself and briefly how it works. Background The memcpy() routine in the standard C library...

Red Hat is pleased to announce the Beta availability of Red Hat Developer Toolset 2.1. Red Hat Developer Toolset 2.1 beta delivers the following capabilities: Users can compile on Red Hat Enterprise Linux 6 to run on Red Hat Enterprise Linux 6 and test on Red Hat Enterprise Linux 7 Beta. In addition, the Red Hat Developer Toolset retains functionality allowing users to compile on Red Hat Enterprise Linux 5 and deploy on Red Hat Enterprise Linux 5 or Red...

This is our new Red Hat Developer Newsletter that launched last month. Please register for this and receive a summary of important Red Hat developer news. The January issue will be going out soon! Welcome to the inaugural issue of the Red Hat Developer Monthly Newsletter If you're reading this, you probably already know that Red Hat is the world's leading provider of open source solutions, using a community-powered approach to provide reliable and high-performing Linux, cloud, virtualization, storage, and...