GCC 13 Release Series
Changes, New Features, and Fixes

This page is a "brief" summary of some of the huge number of improvements in GCC 13. You may also want to check out our Porting to GCC 13 page and the full GCC documentation.

Note: GCC 13 has not been released yet, so this document is a work-in-progress.

Caveats

• ...

General Improvements

• OpenMP
  • The following OpenMP 5.1 features have been added: the omp_all_memory reserved locator, the inoutset modifier to the depend clause, the nowait clause for the taskwait directive and the omp_target_is_accessible, omp_target_memcpy_async, omp_target_memcpy_rect_async and omp_get_mapped_ptr API routines. Fortran now supports non-rectangular loop nests, which were added for C/C++ in GCC 11.
• AddressSanitizer defaults to detect_stack_use_after_return=1 on GNU/Linux targets. For compatibility, it can be disabled with env ASAN_OPTIONS=detect_stack_use_after_return=0.

New Languages and Language specific improvements

C

• New warnings:
  • -Wenum-int-mismatch warns about mismatches between an enumerated type and an integer type (PR105131)

C++

• Several C++23 features have been implemented:
  • P2324R1, Labels at the end of compound statements (PR103539)

New Targets and Target Specific Improvements

AMD Radeon (GCN)

• Support for the Instinct MI200 series devices ( gfx90a) has been added.

arm

• The STAR-MC1 CPU is now supported through the star-mc1 argument to the -mcpu and -mtune options.

Operating Systems

Other significant improvements