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 Benchmarking Platform
Phoromatic Test Orchestration

GCC 4.8 Improves Its Runtime Library (libstdc++)

Compiler

Published on 17 January 2013 04:39 PM EST
Written by Michael Larabel in Compiler
Add A Comment

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 News
  1. LLVM 3.7 Is Planned For A Late August Release
  2. The OpenGL ES 3.1 Foundation Is Being Laid In Mesa
  3. There Are 140k Benchmark Results So Far On LinuxBenchmarking.com
  4. LLVM 3.6.1 Brings R600 & MIPS Fixes
  5. Friction Building Around An Ubuntu Community Council Decision
  6. Bye Bye Mandriva, She's Being Liquidated
  7. Fedora 22 Is Now Available
  8. Red Hat Has Another Developer Now Working On Nouveau
  9. Scribus 1.5 Released, Ported To Qt 5 With Big UI Overhaul Coming
  10. Mesa May Soon Enable OpenGL ES 1.x/2.x By Default
Latest Articles & Reviews
  1. Opening The Gates To Our Daily Open-Source Linux Benchmark Results
  2. The Latest Features For Linux Performance Management + Benchmark Monitoring
  3. Noctua NH-U12DX i4 + NF-F12
  4. Btrfs RAID 0/1 Benchmarks On The Linux 4.1 Kernel
Most Viewed News This Week
  1. The Linux 4.0 EXT4 RAID Corruption Bug Has Been Uncovered
  2. NVIDIA's Proprietary Driver Is Moving Closer With Kernel Mode-Setting
  3. Microsoft Open-Sources The Windows Communication Foundation
  4. Systemd 220 Has Finally Been Released
  5. Zapcc Claims To Be A "Much Faster C++ Compiler"
  6. LibreOffice 5.0 Beta 1 Released
  7. Another HTTPS Vulnerability Rattles The Internet
  8. LibreOffice 5.0 Open-Source Office Suite Has Been Branched