Hello,
Squid build produces lots of warnings in modern build environments
such as Ubuntu 16.04:
> make > /dev/null
> /usr/bin/ar: `u' modifier ignored since `D' is the default (see `U')
> /usr/bin/ar: `u' modifier ignored since `D' is the default (see `U')
...
> /usr/bin/ar: `u' modifier
http://build.squid-cache.org/job/5-matrix/compiler=gcc,label=d-debian-unstable/27/--
[...truncated 34536 lines...]
../../../../src/ssl/support.cc:473:96: error: invalid conversion from 'int
(*)(CRYPTO_EX_DATA*, CRYPTO_EX_DATA*, void*, int, long int, void*)