sbsigntool: fix compile error when enable DEBUG_BUILD

Fixes the following error when set DEBUG_BUILD = "1":
fileio.c: In function ‘__fileio_read_file’:
fileio.c:179:12: error: ‘len’ may be used uninitialized in this function [-Werror=maybe-uninitialized]
  179 |   *out_len = len;
      |   ~~~~~~~~~^~~~~
fileio.c:178:12: error: ‘buf’ may be used uninitialized in this function [-Werror=maybe-uninitialized]
  178 |   *out_buf = buf;
      |   ~~~~~~~~~^~~~~
cc1: all warnings being treated as errors

Signed-off-by: Yi Zhao <yi.zhao@windriver.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/meta-signing-key/recipes-devtools/sbsigntool/sbsigntool_git.bb b/meta-signing-key/recipes-devtools/sbsigntool/sbsigntool_git.bb
index 0ec2250..c9cc615 100644
--- a/meta-signing-key/recipes-devtools/sbsigntool/sbsigntool_git.bb
+++ b/meta-signing-key/recipes-devtools/sbsigntool/sbsigntool_git.bb
@@ -41,6 +41,8 @@ def efi_arch(d):
 #    --with-libtool-sysroot \
 #"
 
+CFLAGS += "-Wno-error=maybe-uninitialized"
+
 HOST_EXTRACFLAGS += "\
     INCLUDES+='-I${S}/lib/ccan.git/ \
               -I${STAGING_INCDIR_NATIVE}/efi \