I did this
Got following message when build on debian 9 ppc64le
CC vtls/libcurl_la-mbedtls.lo
CCLD libcurl.la
/usr/bin/ar: u' modifier ignored since D' is the default (see `U')
make[2]: Leaving directory '/home/foobar/curl60/curl-7.60.0/lib'
I expected the following
no warning "/usr/bin/ar: u' modifier ignored since D' is the default (see `U')"
curl/libcurl version
7.60.0
operating system
foobar@deb9le-dev01:~$ uname -a
Linux deb9le-dev01 4.9.0-3-powerpc64le #1 SMP Debian 4.9.30-2 (2017-06-12) ppc64le GNU/Linux