build error for 1.13.2

[Kevin Worthington]

Hello!

On Cygwin 64-bit, I am getting this build error (worked fine on Cygwin
32-bit) :

        -o objs/src/os/unix/ngx_udp_send.o \
        src/os/unix/ngx_udp_send.c
cc -c -pipe  -O -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g
-D FD_
SETSIZE=2048 -I src/core -I src/event -I src/event/modules -I src/os/unix
-I /us
r/include/libxml2 -I objs \
        -o objs/src/os/unix/ngx_udp_sendmsg_chain.o \
        src/os/unix/ngx_udp_sendmsg_chain.c
src/os/unix/ngx_udp_sendmsg_chain.c: In function `ngx_sendmsg':
src/os/unix/ngx_udp_sendmsg_chain.c:274:16: error: `struct in_pktinfo' has
no me
mber named `ipi_spec_dst'
             pkt->ipi_spec_dst = sin->sin_addr;
                ^
objs/Makefile:847: recipe for target
'objs/src/os/unix/ngx_udp_sendmsg_chain.o'
failed
make[1]: *** [objs/src/os/unix/ngx_udp_sendmsg_chain.o] Error 1
make[1]: Leaving directory '/home/kevin.worthington/nginx-1.13.1'
Makefile:8: recipe for target 'build' failed
make: *** [build] Error 2

Help and/or patches are much appreciated. Thank you!

Best regards,
Kevin
--
Kevin Worthington
kworthington (at} gmail {dot) com
https://kevinworthington.com/
https://twitter.com/kworthington
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