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Makefile.inc: Enable -Wtype-limits 

This patch enables -Wtype-limits for the whole repository, which
disallows checking for a condition that must be always true or always
false based on type width (e.g. checking whether an unsigned variable is
negative or whether a 32-bit integer is larger than 4G). This helps
avoid easy to make and hard to find (because they often only affect
error paths) mistakes like

 size_t size = fmap_read_area(...);
 if (size < 0)
   die("If only the compiler could've told me to use ssize_t instead");

Change-Id: I19edabfd092d09dad720e3fc47b44838163bfe25
Signed-off-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/32536
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Furquan Shaikh <furquan@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Julius Werner 2019-05-01 16:48:44 -07:00 committed by Patrick Georgi
parent 7c712bbb6c
commit c4ab50cdde
1 changed files with 1 additions and 1 deletions
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Makefile.inc
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@ -401,7 +401,7 @@ endif
CFLAGS_common += -pipe -g -nostdinc -std=gnu11 CFLAGS_common += -pipe -g -nostdinc -std=gnu11
CFLAGS_common += -nostdlib -Wall -Wundef -Wstrict-prototypes -Wmissing-prototypes CFLAGS_common += -nostdlib -Wall -Wundef -Wstrict-prototypes -Wmissing-prototypes
CFLAGS_common += -Wwrite-strings -Wredundant-decls -Wno-trigraphs CFLAGS_common += -Wwrite-strings -Wredundant-decls -Wno-trigraphs
CFLAGS_common += -Wstrict-aliasing -Wshadow -Wdate-time CFLAGS_common += -Wstrict-aliasing -Wshadow -Wdate-time -Wtype-limits
CFLAGS_common += -fno-common -ffreestanding -fno-builtin -fomit-frame-pointer CFLAGS_common += -fno-common -ffreestanding -fno-builtin -fomit-frame-pointer
CFLAGS_common += -ffunction-sections -fdata-sections -fno-pie CFLAGS_common += -ffunction-sections -fdata-sections -fno-pie
ifeq ($(CONFIG_COMPILER_GCC),y) ifeq ($(CONFIG_COMPILER_GCC),y)