File configure-suppress-pointer-to-packed-structure-warni.patch of Package odp

From 8d6733aad3e23cbb3813ee7161edb7ae7f9402df Mon Sep 17 00:00:00 2001
From: Petri Savolainen <petri.savolainen@nokia.com>
Date: Wed, 2 Oct 2019 10:17:24 +0300
Subject: [PATCH] configure: suppress pointer to packed structure warnings

Fix GCC-9 build by handling "pointer to packed member of
a struct" warnings not as errors. These warnings are generated
e.g. when taking pointers to protocol header structures, which
are defined with packed attribute. These structures are
naturally aligned, so these warnings can be ignored.

chksum.c: In function odph_process_l4_hdr:
chksum.c:133:43: error: taking address of packed member of
struct <anonymous> may result in an unaligned pointer
value [-Werror=address-of-packed-member]
pkt_chksum_ptr    = (uint16_t *)(void *)&udp_hdr_ptr->chksum;

                                        ^~~~~~~~~~~~~~~~~~~~

Signed-off-by: Petri Savolainen <petri.savolainen@nokia.com>
---
 configure.ac | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/configure.ac b/configure.ac
index 857905c3..69474878 100644
--- a/configure.ac
+++ b/configure.ac
@@ -112,6 +112,7 @@ AC_TYPE_UINT64_T
 ODP_CFLAGS="$ODP_CFLAGS -W -Wall -Werror"
 ODP_CXXFLAGS="$ODP_CXXFLAGS -W -Wall -Werror"
 
+# Additional warnings:
 ODP_CHECK_CFLAG([-Wstrict-prototypes])
 ODP_CHECK_CFLAG([-Wmissing-prototypes])
 ODP_CHECK_CFLAG([-Wmissing-declarations])
@@ -127,6 +128,11 @@ ODP_CHECK_CFLAG([-Wwrite-strings])
 ODP_CHECK_CFLAG([-Wformat-truncation=0])
 ODP_CHECK_CFLAG([-Wformat-overflow=0])
 
+# Suppressed warnings:
+# GCC-9 warns about taking pointers to packed structure fields (e.g. protocol
+# header structures). Generate only warnings on those, not errors.
+ODP_CHECK_CFLAG([-Wno-error=address-of-packed-member])
+
 ODP_CFLAGS="$ODP_CFLAGS -std=c99"
 ODP_CXXFLAGS="$ODP_CXXFLAGS -std=c++11"
 
-- 
2.16.4