GCC 8 Gnu compiler arrives: Here’s what’s new

The Gnu Compiler Collection platform gets upgrades for diagnostics and C++

The new Version 8.1 of the Gnu Compiler Collection (GCC) improves diagnostics and C++ support. GCC provides front ends and libraries for the Ada, C, C++, Fortran, and Google Go languages.

Despite what the version number indicates, GCC 8.1 is actually the first production release in the new GCC line. 

GCC 8.1’s new features include:

  • Better emitted diagnostics, with improved locations, location ranges, and fix-it hints, particularly in the C++ front end.
  • Improvements to profile-driven optimizations, including the splitting of x86 functions into hot and cold regions by default.
  • Link-time optimizations have a new way of emitting Dwarf format debug information, making LTO-optimized code more debuggable.
  • The C++ front end has experimental support for parts of the upcoming C++ 2a draft, the next version of C++ expected in 2020. Featured are the std=c++2a and std=gnu++2a flags, including designated initializers and default member initializers for bit fields.
  • The libstdc++ library has further C++ 17 and C++ 2a draft library features.
  • The AArch64 processor target supports Scalable Vector Extension. Support includes automatic vectorization with SVE instructions. But SVE Arm C Language Extensions are not yet included.

GCC 8.1 also removes some features:

  • Support for the obsolete SBD/coff debug info format has been removed.
  • Cilk+ extensions for C and C++ have been removed.
  • MPX extensions to C and C++ have been deprecated, with removal coming in a future release.

Where to download GCC 8.1

You can download GCC via Gnu’s FTP servers, in the gcc/gcc-8.1.0/ subdirectory.

This story, "GCC 8 Gnu compiler arrives: Here’s what’s new" was originally published by InfoWorld.

  
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