insert`gpl`v2`license`text`here`autoconf`exception`as`a`special`exception,`the`free`software`foundation`gives`unlimited`permission`to`copy,`distribute`and`modify`the`configure`scripts`that`are`the`output`of`autoconf\.`you`need`not`follow`the`terms`of`the`gnu`general`public`license`when`using`or`distributing`such`scripts,`even`though`portions`of`the`text`of`autoconf`appear`in`them\.`the`gnu`general`public`license`\(gpl\)`does`govern`all`other`use`of`the`material`that`constitutes`the`autoconf`program\.`certain`portions`of`the`autoconf`source`text`are`designed`to`be`copied`\(in`certain`cases,`depending`on`the`input\)`into`the`output`of`autoconf\.`we`call`these`the`data`portions\.`the`rest`of`the`autoconf`source`text`consists`of`comments`plus`executable`code`that`decides`which`of`the`data`portions`to`output`in`any`given`case\.`we`call`these`comments`and`executable`code`the`non\-`data`portions\.`autoconf`never`copies`any`of`the`non\-`data`portions`into`its`output\.`this`special`exception`to`the`gpl`applies`to`versions`of`autoconf`released`by`the`free`software`foundation\.`when`you`make`and`distribute`a`modified`version`of`autoconf,`you`may`extend`this`special`exception`to`the`gpl`to`apply`to`your`modified`version`as`well,`\*unless\*`your`modified`version`has`the`potential`to`copy`into`its`output`some`of`the`text`that`was`the`non\-`data`portion`of`the`version`that`you`started`with\.`\(in`other`words,`unless`your`change`moves`or`copies`text`from`the`non\-`data`portions`to`the`data`portions\.\)`if`your`modification`has`such`potential,`you`must`delete`any`notice`of`this`special`exception`to`the`gpl`from`your`modified`version\.