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. Scythe Mugen MAX
  2. Intel Core i7 5960X Haswell-E On Linux
  3. Intel 80GB 530 Series M.2 SSD On Linux
  4. With A New Motherboard, The Core i7 5960X Haswell-E Lights Up
Latest Linux Articles
  1. 7-Way Linux Desktop Gaming Comparison On Ubuntu 14.10
  2. Intel P-State vs. CPUFreq Benchmarks On The i7-5960X
  3. RadeonSI GLAMOR Benchmarks With X.Org Server 1.16
  4. RadeonSI Gallium3D vs. Catalyst At 4K UHD On Linux
Latest Linux News
  1. FreeBSD 10.1 Has The New VT Driver, Hardware Improvements
  2. AntiMicro 2.6 Yields Greater Compatibility For Gamepads On Linux
  3. OpenGL 3.3 / GLSL 3.30 Lands For Intel Sandy Bridge On Mesa
  4. AMD's RadeonSI Gallium3D Driver Sees Some Improvements
  5. Mesa 10.3 Released With The Latest Open-Source GPU Driver Improvements
  6. GNOME 3.13.92 Officially Released
  7. Wine 1.7.27 Is Still Working Towards Direct2D Support
  8. Wasteland 2 Officially Launched Today, Including For Linux Gamers
  9. Tropico 5 Launches On Steam For Linux
  10. The Intel Core i7 5960X Continues Running Great On Linux
Latest Forum Discussions
  1. Stop grabbing my keyboard :(
  2. X.Org Women Outreach Program Only Turns Up Two Applicants So Far
  3. Glamor now enabled in Debian radeonsi
  4. Can Linux kill a motherboard?
  5. SSD seems slow
  6. New stress testing utility for GPU's
  7. New Group Calls For Boycotting Systemd
  8. It's Now Possible To Play Netflix Natively On Linux Without Wine Plug-Ins