From 7277c8aaa0979098dbddc5ed321d1d1d3449d9fd Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Wed, 12 Jul 2017 19:25:47 -0700 Subject: [PATCH] disable new gcc-7.1.1 warnings for now I made the mistake of upgrading my desktop to the new Fedora 26 that comes with gcc-7.1.1. There's nothing wrong per se that I've noticed, but I now have 1500 lines of warnings, mostly from the new format-truncation warning triggering all over the tree. We use 'snprintf()' and friends in a lot of places, and often know that the numbers are fairly small (ie a controller index or similar), but gcc doesn't know that, and sees an 'int', and thinks that it could be some huge number. And then complains when our buffers are not able to fit the name for the ten millionth controller. These warnings aren't necessarily bad per se, and we probably want to look through them subsystem by subsystem, but at least during the merge window they just mean that I can't even see if somebody is introducing any *real* problems when I pull. So warnings disabled for now. Signed-off-by: Linus Torvalds [sw0312.kim: cherry-pick from mainline to fix build warning with gcc 7] Signed-off-by: Seung-Woo Kim Change-Id: Idfb16c6d8a06d040acb3488fe1d304ca8468dc24 --- Makefile | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/Makefile b/Makefile index 1a4f229..6d67e87 100644 --- a/Makefile +++ b/Makefile @@ -571,6 +571,10 @@ endif # $(dot-config) # Defaults to vmlinux, but the arch makefile usually adds further targets all: vmlinux +KBUILD_CFLAGS += $(call cc-disable-warning, format-truncation) +KBUILD_CFLAGS += $(call cc-disable-warning, format-overflow) +KBUILD_CFLAGS += $(call cc-disable-warning, int-in-bool-context) + ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE KBUILD_CFLAGS += -Os $(call cc-disable-warning,maybe-uninitialized,) else -- 2.7.4