Not every __sun has backtrace().
Not every __sun has backtrace().

I don't know how to test for Open Solaris that has support for
backtrace() so for now removing the #ifdef that breaks compilation under
other Solaris flavors.

shanegxxiao/redis,quangnguyen90/redis,nandhanurrevanth/redis,DeNA/redis,enginekit/redis,ideaar/redis,upsoft/redis,shanegxxiao/redis,oaastest/redis,alpha8/redis,jqk6/redis,Jonavin/redis,sidsen/redis,kts12345/redis,jacklee0810/redis,hanmichael/redis,miminus/redis,ScottKaiGu/redis,liqiang199105/redis,kolonse/redis,janeasystems/redis,laurencee/redis,adamweixuan/redis,adamweixuan/redis,hanmichael/redis,ideaar/redis,hanmichael/redis,miminus/redis,Jonavin/redis,Cybermaxs/redis,kts12345/redis,Jonavin/redis,laurencee/redis,jaambee/redis,jacklee0810/redis,damy/redis,ideaar/redis,Cybermaxs/redis,janeasystems/redis,damy/redis,nandhanurrevanth/redis,kts12345/redis,alpha8/redis,DeNA/redis,sidsen/redis,alpha8/redis,Cybermaxs/redis,sidsen/redis,ScottKaiGu/redis,ScottKaiGu/redis,jqk6/redis,jaambee/redis,janeasystems/redis,enginekit/redis,upsoft/redis,sidsen/redis,damy/redis,jacklee0810/redis,ideaar/redis,ScottKaiGu/redis,kolonse/redis,Jonavin/redis,damy/redis,nandhanurrevanth/redis,laurencee/redis,jqk6/redis,upsoft/redis,kts12345/redis,laurencee/redis,enginekit/redis,adamweixuan/redis,kts12345/redis,quangnguyen90/redis,quangnguyen90/redis,quangnguyen90/redis,kolonse/redis,jqk6/redis,Cybermaxs/redis,laurencee/redis,janeasystems/redis,oaastest/redis,sidsen/redis,hanmichael/redis,miminus/redis,liqiang199105/redis,Jonavin/redis,oaastest/redis,jaambee/redis,miminus/redis,hanmichael/redis,enginekit/redis,oaastest/redis,Cybermaxs/redis,upsoft/redis,liqiang199105/redis,adamweixuan/redis,jacklee0810/redis,ScottKaiGu/redis,DeNA/redis,enginekit/redis,jaambee/redis,jacklee0810/redis,miminus/redis,nandhanurrevanth/redis,jqk6/redis,jaambee/redis,kolonse/redis,shanegxxiao/redis,liqiang199105/redis,quangnguyen90/redis,liqiang199105/redis,nandhanurrevanth/redis,damy/redis,adamweixuan/redis,shanegxxiao/redis,ideaar/redis,janeasystems/redis,alpha8/redis,sidsen/redis,oaastest/redis,alpha8/redis,kolonse/redis,upsoft/redis,shanegxxiao/redis