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mk: disable warning for packed member pointer

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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@intel.com>
Tested-by: David Marchand <david.marchand@redhat.com>
This commit is contained in:
Reshma Pattan 2019-05-02 10:33:34 +01:00 committed by Thomas Monjalon
parent 86cc8ff243
commit a385972c36
1 changed files with 3 additions and 0 deletions
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3
mk/toolchain/gcc/rte.vars.mk
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@ -87,5 +87,8 @@ WERROR_FLAGS += -Wimplicit-fallthrough=2
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