Author Laël Cellier
Recipients Laël Cellier, furkanonder, skrah
Date 2020-06-09.14:40:01
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If -fwrapv isn’t enabled (whereas with gcc this is the default with ‑O2), then it means -ftrapv is enabled.

And from the manual page :
This option generates traps for signed overflow on addition, subtraction, multiplication operations.

Did you checked if the binary compiles fines with all ‑O2/‑O3 options replaced with ‑O0 in configure/Makefiles along gcc ?
Date User Action Args
2020-06-09 14:40:02Laël Celliersetrecipients: + Laël Cellier, skrah, furkanonder
2020-06-09 14:40:02Laël Celliersetmessageid: <>
2020-06-09 14:40:02Laël Cellierlinkissue40223 messages
2020-06-09 14:40:01Laël Celliercreate