[dpdk-stable] [PATCH 18.11 1/3] mk: disable warning for packed member pointer
Kevin Traynor
ktraynor at redhat.com
Thu May 16 20:21:55 CEST 2019
From: Reshma Pattan <reshma.pattan at intel.com>
[ upstream commit a385972c3675dd2b4792ab5b3cf7a536e6f9846c ]
gcc 9 on Fedora 30 gives an error
"taking address of packed member may result in an
unaligned pointer value" warnings.
For clang builds this warning is already disabled,
so disable "-Waddress-of-packed-member" for gcc builds
also.
Snippet of build error:
lib/librte_eal/linux/eal/eal_memalloc.c: In function ‘alloc_seg_walk’:
lib/librte_eal/linux/eal/eal_memalloc.c:768:12: error:
taking address of packed member of ‘struct rte_mem_config’ may result
in an unaligned pointer value [-Werror=address-of-packed-member]
768 | cur_msl = &mcfg->memsegs[msl_idx];
| ^~~~~~~~~~~~~~~~~~~~~~~
Signed-off-by: Reshma Pattan <reshma.pattan at intel.com>
Tested-by: David Marchand <david.marchand at redhat.com>
---
mk/toolchain/gcc/rte.vars.mk | 3 +++
1 file changed, 3 insertions(+)
diff --git a/mk/toolchain/gcc/rte.vars.mk b/mk/toolchain/gcc/rte.vars.mk
index d8b99faf6..b852fcfd7 100644
--- a/mk/toolchain/gcc/rte.vars.mk
+++ b/mk/toolchain/gcc/rte.vars.mk
@@ -88,4 +88,7 @@ WERROR_FLAGS += -Wno-format-truncation
endif
+# disable packed member unalign warnings
+WERROR_FLAGS += -Wno-address-of-packed-member
+
export CC AS AR LD OBJCOPY OBJDUMP STRIP READELF
export TOOLCHAIN_CFLAGS TOOLCHAIN_LDFLAGS TOOLCHAIN_ASFLAGS
--
2.20.1
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