xcompile: Explicitly disable warning address-of-packed-member

With GCC 9.x has a new warning *address-of-packed-member*.

> -Waddress-of-packed-member
>
>     Warn when the address of packed member of struct or union is
>     taken, which usually results in an unaligned pointer value.
>     This is enabled by default.

This results in the build errors below, for example, with GCC 9.2 from
Debian Sid/unstable.

    src/southbridge/intel/common/spi.c: In function 'spi_init':
    src/southbridge/intel/common/spi.c:298:19: error: taking address of packed member of 'struct ich7_spi_regs' may result in an unaligned pointer value [-Werror=address-of-packed-member]
      298 |   cntlr->optype = &ich7_spi->optype;
          |                   ^~~~~~~~~~~~~~~~~

Therefore, explicitly disable the warning.

Change-Id: I01d0dcdd0f8252ab65b91f40bb5f5c5e8177a293
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Signed-off-by: Paul Menzel <pmenzel@molgen.mpg.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/36940
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-by: Jacob Garber <jgarber1@ualberta.ca>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/util/xcompile/xcompile b/util/xcompile/xcompile
index f431625878..2d3da1e00e 100755
--- a/util/xcompile/xcompile
+++ b/util/xcompile/xcompile
@@ -227,7 +227,7 @@ SUBARCH_SUPPORTED+=${TSUPP-${TARCH}}
 GCC_CC_${TARCH}:=${GCC}
 GCC_CFLAGS_${TARCH}:=${CFLAGS_GCC}
 # Generally available for GCC's cc1:
-GCC_CFLAGS_${TARCH}+=-Wlogical-op
+GCC_CFLAGS_${TARCH}+=-Wlogical-op -Wno-address-of-packed-member
 GCC_ADAFLAGS_${TARCH}:=${CFLAGS_GCC}
 GCC_COMPILER_RT_${TARCH}:=${CC_RT_GCC}
 GCC_COMPILER_RT_FLAGS_${TARCH}:=${CC_RT_EXTRA_GCC}