1. Computers
  2. Display Drivers
  3. Graphics Cards
  4. Memory
  5. Motherboards
  6. Processors
  7. Software
  8. Storage
  9. Operating Systems


Facebook RSS Twitter Twitter Google Plus


Phoronix Test Suite

OpenBenchmarking.org

GCC 4.8 Improves Its Runtime Library (libstdc++)

Compiler

Published on 17 January 2013 04:39 PM EST
Written by Michael Larabel in Compiler
Comment On This Article

There's been many Phoronix articles already covering features and changes coming to GCC 4.8, the next major compiler update to come out of the Free Software Foundation in March or April. One of the areas that's seen improvements in GCC 4.8 and not talked about much yet is the improvements to its runtime library, libstdc++, with new features being present.

Among the changes talked about already for GCC 4.8 is its greater optimizations, 64-bit ARM support, the Local Register Allocator, improved C++11 support, and other new features.

When it comes to the libstdc++ runtime library for GCC 4.8, the in-development documentation now cites improved experimental support for the ISO C++11 standard, improvements to random, and a --disable-libstdcxx-verbose configuration option for disabling diagnostic messages from abnormal process termination.

The libstdc++ improvements for C++11 in this next GNU Compiler Collection release includes forward_list meeting the allocator-aware container requirements, and the following are defined by default: this_thread::sleep_for(), this_thread::sleep_until(), this_thread::yield().

The random improvements include an SSE-optimized normal_distribution function and random_device now supports using the hardware RNG instruction on newer x86 processors. RNG is present with the new Intel Ivy Bridge processors thanks to its "Bull Mountain" hardware-based random number generator. Also improving the randomness is a new random number engine simd_fast_mersenne_twister_engine with an optimized SSE version and eight new random number distributions (beta_distribution, normal_mv_distribution, rice_distribution, nakagami_distribution, pareto_distribution, k_distribution, arcsine_distribution, hoyt_distribution).

While there's been many C++11 improvements within the GCC 4.8 compiler itself and the libstdc++ runtime library, the support as of GCC 4.8 is still deemed experimental. The current state of C++11 support within libstdc++ is listed within the GCC online documentation.

Other recent C++11 news of interest is More Open-Source Projects Eyeing Up C++11, C++11 Support In Qt 5.0, and LLVM Developers Ponder Using C++11 Features.

Separate from GCC's libstdc++, LLVM's libc++ standard library continues maturing as well too with a focus on C++11 compliance. The latest details on LLVM's C++ library are available from its LLVM.org project site. The brief current status is still displayed as, "libc++ is a 100% complete C++11 implementation on Apple's OS X. LLVM and Clang can self host in C++ and C++11 mode with libc++ on Linux."

About The Author
Michael Larabel is the principal author of Phoronix.com and founded the web-site in 2004 with a focus on enriching the Linux hardware experience and being the largest web-site devoted to Linux hardware reviews, particularly for products relevant to Linux gamers and enthusiasts but also commonly reviewing servers/workstations and embedded Linux devices. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics hardware drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated testing software. He can be followed via and or contacted via .
Latest Linux Hardware Reviews
  1. AMD's New Athlon/Semprons Give Old Phenom CPUs A Big Run For The Money
  2. 13-Way Low-End GPU Comparison With AMD's AM1 Athlon
  3. ASUS AM1I-A: A Mini-ITX Board For Socketed Kabini APUs
  4. Mini-Box M350: A Simple, Affordable Mini-ITX Case
Latest Linux Articles
  1. How Much Video RAM Is Needed For Catalyst R3 Graphics?
  2. Ubuntu 12.04 LTS vs. 14.04 LTS Cloud Benchmarks
  3. Ubuntu 12.04.4 vs. 13.10 vs. 14.04 LTS Desktop Benchmarks
  4. AMD OpenCL Performance With AM1 Kabini APUs
Latest Linux News
  1. OpenELEC 4.0 Beta 6 Works On 4K Graphics, RPi ALSA
  2. Linux 3.15 Lands Some DRM Graphics Driver Fixes
  3. AMD Is Disabling DPM Support For RV770 GPUs
  4. ReactOS Working On A Community Windows OS
  5. Borderlands Is Being Considered For Linux
  6. Mesa 10.0 & 10.1 Stable Get Updated
  7. Getting Hit By The Variable Performance Of The Public Cloud
  8. Git 2.0 Test Releases Begin With Many Changes
  9. Wine 1.7.17 Works On Its Task Scheduler, C Run-Time
  10. The Improv ARM Board Still Isn't Shipping; Riding A Dead Horse?
  11. Debian To Maintain 6.0 Squeeze As An LTS Release
  12. Wasteland 2 Is Finally Released For Linux Gamers
Latest Forum Discussions
  1. The GNOME Foundation Is Running Short On Money
  2. Updated and Optimized Ubuntu Free Graphics Drivers
  3. Catalyst 14.3 Beta
  4. Suggestions about how to make a Radeon HD 7790 work decently?
  5. Radeon 8000M problematic on Linux?
  6. Linux Kernel Developers Fed Up With Ridiculous Bugs In Systemd
  7. After Jack Keane, RuseSoft will briing Ankh 3 to Linux through Desura
  8. Suspected PHP Proxy Issue