Otherwise the temporary fix for this for code builds is to put
*AR_FLAGS="crU"* in configure.ac

On Mon, Apr 8, 2019 at 12:12 AM . <d3m0nkingx@gmail.com> wrote:

> Hello libtool devs,
>
> There's a common information/warning message that occurs with building
> secp256k1 for example where it states:
>
> *"/usr/bin/ar: `u' modifier ignored since `D' is the default (see `U')"*
>
> This can be resolved if "cru" is changed to "crU" in:
>
> */usr/share/aclocal/libtool.m4*
>
>
> Please consider doing this, thank you !
>