configure: only try -Qunused-arguments for clang
authorRich Felker <dalias@aerifal.cx>
Thu, 13 Sep 2018 02:43:38 +0000 (22:43 -0400)
committerRich Felker <dalias@aerifal.cx>
Thu, 13 Sep 2018 02:43:38 +0000 (22:43 -0400)
commit7634101069db26b003adeec09c6aa14646363557
tree8e185ccbd99b5a40389d69dbba18d990015c4ee0
parent3e14bbcd1979376b188bfabb816ff828608fb5d7
configure: only try -Qunused-arguments for clang

other compilers don't need this option, but gcc 3 and perhaps others
accept it despite not understanding it, then print warnings about it
at build time.

omitting it when not needed will also help shorten the command lines.
configure