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[build] Enable strict shift overflow warnings

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Left shifts into the sign bit are often reported as potential
undefined behaviour by automated tools, which distracts from real
issues.

Now that all offending constant left shifts have been eliminated from
the codebase, enable -Wshift-overflow=2 to ensure that such shifts
cannot be reintroduced in future.

Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2026-08-04 00:19:00 +01:00
parent 07a0d64fb6
commit 1e8f4fed41
1 changed files with 2 additions and 2 deletions
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src/Makefile.housekeeping
+2 -2
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@@ -488,9 +488,9 @@ CFLAGS += -g
ifeq ($(CCTYPE),gcc)
CFLAGS += -ffreestanding
CFLAGS += -fno-common
CFLAGS += -Wall -W -Wformat-nonliteral
CFLAGS += -Wall -W -Wformat-nonliteral -Wshift-overflow=2
CFLAGS += -Wno-array-bounds -Wno-dangling-pointer
HOST_CFLAGS += -Wall -W -Wformat-nonliteral
HOST_CFLAGS += -Wall -W -Wformat-nonliteral -Wshift-overflow=2
HOST_CFLAGS += -Wno-array-bounds -Wno-dangling-pointer
endif
CFLAGS += $(WORKAROUND_CFLAGS) $(EXTRA_CFLAGS)