GCC 6 Release Series
Changes, New Features, and Fixes

This page is a brief summary of some of the huge number of improvements in GCC 6. For more information, see the Porting to GCC 6 page and the full GCC documentation.

Caveats

General Optimizer Improvements

New Languages and Language specific improvements

Compared to GCC 5, the GCC 6 release series includes a much improved implementation of the OpenACC 2.0a specification. Highlights are: See the OpenACC and Offloading wiki pages for further information.

C family

C

C++

Runtime Library (libstdc++)

Fortran

libgccjit

New Targets and Target Specific Improvements

AArch64

ARM

Heterogeneous Systems Architecture

IA-32/x86-64

MeP

MSP430

PowerPC / PowerPC64 / RS6000

S/390, System z, IBM z Systems

SH

SPARC

Operating Systems

AIX

Linux

RTEMS

Solaris

Windows

Other significant improvements

GCC 6.2

This is the list of problem reports (PRs) from GCC's bug tracking system that are known to be fixed in the 6.2 release. This list might not be complete (that is, it is possible that some PRs that have been fixed are not listed here).

Target Specific Changes

SPARC

GCC 6.3

This is the list of problem reports (PRs) from GCC's bug tracking system that are known to be fixed in the 6.3 release. This list might not be complete (that is, it is possible that some PRs that have been fixed are not listed here).

Target Specific Changes

IA-32/x86-64

GCC 6.4

This is the list of problem reports (PRs) from GCC's bug tracking system that are known to be fixed in the 6.4 release. This list might not be complete (that is, it is possible that some PRs that have been fixed are not listed here).

Operating Systems

RTEMS