[OpenWrt-Devel] [PATCH v1] umdns: suppress address-of-packed-member warning

Kevin Darbyshire-Bryant ldir at darbyshire-bryant.me.uk
Sat Apr 4 04:27:34 EDT 2020

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

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 at darbyshire-bryant.me.uk>
 package/network/services/umdns/Makefile | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/package/network/services/umdns/Makefile b/package/network/services/umdns/Makefile
index ffbc3fed35..7dbbea322a 100644
--- a/package/network/services/umdns/Makefile
+++ b/package/network/services/umdns/Makefile
@@ -8,7 +8,7 @@
 include $(TOPDIR)/rules.mk
@@ -30,7 +30,7 @@ define Package/umdns
   DEPENDS:=+libubox +libubus +libblobmsg-json
-TARGET_CFLAGS += -I$(STAGING_DIR)/usr/include
+TARGET_CFLAGS += -I$(STAGING_DIR)/usr/include -Wno-address-of-packed-member
 define Package/umdns/conffiles
2.24.1 (Apple Git-126)

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