[tboot-devel] [PATCH] GCC update caused build error: writing 1 byte into a region of size 0 [-Werror=stringop-overflow]

[Jun M. <jun...@in...>]

From: "Jun.Miao" <jun...@in...>

Add a CFLAGS "-Wo-stringop-overflow" to void build error in the fedora:36 by the
gcc -O2 optimization, which`s version: gcc (GCC) 12.0.1 20220118 (Red Hat 12.0.1-0).

build error log:
common/memlog.c: In function ‘memlog_init’:
common/memlog.c:53:20: error: writing 1 byte into a region of size 0 [-Werror=stringop-overflow=]
   53 |        g_log->uuid = (uuid_t)TBOOT_LOG_UUID;
common/memlog.c:53:20: error: writing 1 byte into a region of size 0 [-Werror=stringop-overflow=]
common/memlog.c:53:20: error: writing 1 byte into a region of size 0 [-Werror=stringop-overflow=]
common/memlog.c:53:20: error: writing 1 byte into a region of size 0 [-Werror=stringop-overflow=]
common/memlog.c:53:20: error: writing 1 byte into a region of size 0 [-Werror=stringop-overflow=]
common/memlog.c:53:20: error: writing 1 byte into a region of size 0 [-Werror=stringop-overflow=]
common/memlog.c:68:26: error: writing 1 byte into a region of size 0 [-Werror=stringop-overflow=]
   68 |         g_log->zip_count = 0;
      |         ~~~~~~~~~~~~~~~~~^~~

Signed-off-by: Jun.Miao <jun...@in...>
---
 Config.mk | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Config.mk b/Config.mk
index ed0aef0..b9342bc 100644
--- a/Config.mk
+++ b/Config.mk
@@ -20,6 +20,7 @@ include $(ROOTDIR)/Config.mk
 CFLAGS		:= $(shell echo $(CFLAGS) | sed -e s/-m64/-m32/)
 CFLAGS		+= -march=i686
 CFLAGS		+= -nostdinc
+CFLAGS         += -Wno-stringop-overflow
 CFLAGS		+= -fno-builtin -fno-common -fno-strict-aliasing
 CFLAGS		+= -fomit-frame-pointer
 CFLAGS		+= -pipe
-- 
2.35.0.rc2