GCC 14 Release SeriesChanges, New Features, and Fixes This page is a "brief" summary of some of the huge number of improvements in GCC 14. You may also want to check out our Porting to GCC 14 page and the full GCC documentation. Caveats C: Support for the GCC extension, a structure containing a C99 flexible array member, or a union containing such a structure, is not the last field of another structure, is deprecated. Refer to Zero Length Arrays. Any code relying on this extension should be modi...