Update ax_cxx_compile_stdcxx.m4
Update ax_cxx_compile_stdcxx.m4
cr-marcstevens/fplll,cr-marcstevens/fplll,dstehle/fplll,fplll/fplll,cr-marcstevens/fplll,fplll/fplll,fplll/fplll,dstehle/fplll,fplll/fplll,cr-marcstevens/fplll,fplll/fplll,dstehle/fplll