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| author | Jason A. Donenfeld <Jason@zx2c4.com> | 2021-05-31 14:28:46 +0200 |
|---|---|---|
| committer | Jason A. Donenfeld <Jason@zx2c4.com> | 2021-06-02 18:31:09 +0200 |
| commit | 405caf01e9b234bc512ec93ac055d57336ce18d9 (patch) | |
| tree | 21203c1129be18734b1eecb5a9bb5b758dc2fe44 | |
| parent | b50ef4dc456178d6d0bc531936501f12f11c2ea8 (diff) | |
kbuild: do not use -O3
Apparently, various versions of gcc have O3-related miscompiles. Looking
at the difference between -O2 and -O3 for gcc 11 doesn't indicate
miscompiles, but the difference also doesn't seem so significant for
performance that it's worth risking.
Link: https://lore.kernel.org/lkml/CAHk-=wjuoGyxDhAF8SsrTkN0-YfCx7E6jUN3ikC_tn2AKWTTsA@mail.gmail.com/
Link: https://lore.kernel.org/lkml/CAHmME9otB5Wwxp7H8bR_i2uH2esEMvoBMC8uEXBMH9p0q1s6Bw@mail.gmail.com/
Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
| -rw-r--r-- | src/Kbuild | 5 |
1 files changed, 2 insertions, 3 deletions
@@ -2,10 +2,9 @@ # # Copyright (C) 2015-2019 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved. -ccflags-y := -O3 -ccflags-$(CONFIG_WIREGUARD_DEBUG) += -DDEBUG -g -ccflags-y += -D'pr_fmt(fmt)=KBUILD_MODNAME ": " fmt' +ccflags-y := -D'pr_fmt(fmt)=KBUILD_MODNAME ": " fmt' ccflags-y += -Wframe-larger-than=2048 +ccflags-$(CONFIG_WIREGUARD_DEBUG) += -DDEBUG -g ccflags-$(if $(WIREGUARD_VERSION),y,) += -D'WIREGUARD_VERSION="$(WIREGUARD_VERSION)"' wireguard-y := main.o noise.o device.o peer.o timers.o queueing.o send.o receive.o socket.o peerlookup.o allowedips.o ratelimiter.o cookie.o netlink.o |