Usability Improvements in GCC 15

I work at Red Hat on GCC, the GNU Compiler Collection. I spent most of the past year working on how GCC emits diagnostics (errors and warnings) in the hope of making it easier to use. Let's take a look at 6 improvements to look forward to in the upcoming GCC 15. 1. Prettier execution paths I added a static analyzer to GCC in GCC 10 that prints visualizations of predicted paths of execution through the user's code, demonstrating each problem it predicts. Here's an example that shows some of the improvements I've made to this in GCC 15: infinite-loop-linked-list.c: In function ‘while_loop_missing_next’: infinite-loop-linked-list.c:30:10: warning: infinite loop [CWE-835] [-Wanalyzer-infinite-loop] 30 | while (n) | ^ ‘while_loop_missing_next’: events 1-3 30 | while (n) | ^ | | | (1) ⚠️ infinite loop here | (2) when ‘n’ is non-NULL: always following ‘true’ branch... ─>─┐ | │ | │ |┌────────────────────────────────────────────────────────────────────────┘ 31 |│ { 32 |│ sum += n->val; |│ ~ ... Read full article.