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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
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