错误信息:Buildingnativeextensions.Thiscouldtakeawhile...ERROR:Errorinstallingrails:ERROR:Failedtobuildgemnativeextension./usr/bin/ruby2.1-r./siteconf20150328-1540-hff2f0.rbextconf.rbcheckingiftheCcompileraccepts...***extconf.rbfailed***CouldnotcreateMakefileduetosomereason,probablylackofnecessarylib
