btrfs-progs: Makefile: Add -Wimplicit-fallthrough

Avoid introducing new cases of implicit fallthrough by having this flag
always set, though a conditional check is needed to avoid build breakage
on older compilers or on CI.

Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Marcos Paulo de Souza <mpdesouza@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
master
Marcos Paulo de Souza 2019-10-21 23:02:28 -03:00 committed by David Sterba
parent 575b6e0e51
commit c052b38418
1 changed files with 4 additions and 0 deletions

View File

@ -78,6 +78,9 @@ TOPDIR := .
DISABLE_WARNING_FLAGS := $(call cc-disable-warning, format-truncation) \
$(call cc-disable-warning, address-of-packed-member)
# Warnings that we want by default
ENABLE_WARNING_FLAGS := $(call cc-option, -Wimplicit-fallthrough)
# Common build flags
CFLAGS = $(SUBST_CFLAGS) \
$(CSTD) \
@ -89,6 +92,7 @@ CFLAGS = $(SUBST_CFLAGS) \
-I$(TOPDIR) \
-I$(TOPDIR)/libbtrfsutil \
$(DISABLE_WARNING_FLAGS) \
$(ENABLE_WARNING_FLAGS) \
$(EXTRAWARN_CFLAGS) \
$(DEBUG_CFLAGS_INTERNAL) \
$(EXTRA_CFLAGS)