CVSROOT: /cvs
Module name: src
Changes by: j...@cvs.openbsd.org 2017/06/06 03:40:24
Modified files:
gnu/llvm/tools/clang/lib/Driver: Tools.cpp
Log message:
Enable -fwrapv by default with clang to treat signed integer overflows
as defined. This is done to prevent dangerous optimisations which could
remove security critical overflow checks.
Base gcc has -fno-strict-overflow by default, with clang this is
identical to -fwrapv.
Prompted by naddy@ discovering a hang with a clang compiled i386 kernel
that was resolved with -fwrapv.
ok kettenis@ pascal@
