+ <condition property="gxx_extra_libs" value="stdc++ System gcc_s.10.4 gcc">\r
+ <os family="mac"/>\r
+ </condition>\r
+ \r
+ <condition property="gxx_extra_libs" value="stdc++">\r
+ <os name="linux"/>\r
+ </condition>\r
+ \r
+ <condition property="gxx_extra_libs" value="stdc++">\r
+ <os family="windows"/>\r
+ </condition>\r
+ \r