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umdns: suppress address-of-packed-member warning

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gcc 8 & 9 appear to be more picky with regards access alignment to
packed structures, leading to this warning in dns.c:

dns.c:261:2: error: converting a packed ‘struct dns_question’ pointer
(alignment 1) to a ‘uint16_t’ {aka ‘short unsigned int’} pointer
(alignment 2) may result in an unaligned pointer value
[-Werror=address-of-packed-member]

261 |  uint16_t *swap = (uint16_t *) q;

Work around what I think is a false positive by turning the warning off.
Not ideal, but not quite as not ideal as build failure.

Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
(cherry picked from commit 02640f014719a994e2e538b2cb6376a189cd39de)
(cherry picked from commit a10b6ec1c8cd6d14a3b76a2ec3d81442b85f7321)
This commit is contained in:
Kevin Darbyshire-Bryant 2020-04-04 09:20:08 +01:00
parent 55312cc202
commit ef3df27507
1 changed files with 2 additions and 2 deletions
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4
package/network/services/umdns/Makefile
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@ -8,7 +8,7 @@
include $(TOPDIR)/rules.mk
PKG_NAME:=umdns
PKG_RELEASE:=1
PKG_RELEASE:=2
PKG_SOURCE_URL=$(PROJECT_GIT)/project/mdnsd.git
PKG_SOURCE_PROTO:=git
@ -30,7 +30,7 @@ define Package/umdns
DEPENDS:=+libubox +libubus +libblobmsg-json
endef
TARGET_CFLAGS += -I$(STAGING_DIR)/usr/include
TARGET_CFLAGS += -I$(STAGING_DIR)/usr/include -Wno-address-of-packed-member
define Package/umdns/conffiles
/etc/config/umdns