From: Ahmad Fatoum <a.fatoum@pengutronix.de>
To: barebox@lists.infradead.org
Cc: bst@pengutronix.de, Ahmad Fatoum <a.fatoum@pengutronix.de>
Subject: [PATCH 3/4] kbuild: add -Wtype-limits to compile flags
Date: Wed, 24 Mar 2021 13:22:46 +0100 [thread overview]
Message-ID: <20210324122247.10683-3-a.fatoum@pengutronix.de> (raw)
In-Reply-To: <20210324122247.10683-1-a.fatoum@pengutronix.de>
Not warning about e.g. comparisons of unsigned integers with 0 can
introduce nasty bugs around error handling especially.
Enable the warning to be able to identify these issues in future.
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
---
Makefile | 3 +++
1 file changed, 3 insertions(+)
diff --git a/Makefile b/Makefile
index 6d78d1f58eca..81ceedafeb0c 100644
--- a/Makefile
+++ b/Makefile
@@ -650,6 +650,9 @@ CHECKFLAGS += $(NOSTDINC_FLAGS)
# warn about C99 declaration after statement
KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
+# warn about e.g. (unsigned)x < 0
+KBUILD_CFLAGS += $(call cc-option,-Wtype-limits)
+
# disable pointer signed / unsigned warnings in gcc 4.0
KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,)
--
2.29.2
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next prev parent reply other threads:[~2021-03-24 12:26 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-24 12:22 [PATCH 1/4] net: phy: at803x: fix incorrect use of FIELD_PREP Ahmad Fatoum
2021-03-24 12:22 ` [PATCH 2/4] clk: imx: clk-pllv1: fix wrong PLL recalc on i.MX1/i.MX21 Ahmad Fatoum
2021-03-24 12:22 ` Ahmad Fatoum [this message]
2021-03-24 12:22 ` [PATCH 4/4] mtd: fix possible overflow during mtd size multiplication Ahmad Fatoum
2021-03-25 12:46 ` [PATCH 1/4] net: phy: at803x: fix incorrect use of FIELD_PREP Sascha Hauer
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