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checks/036.ifdef

 

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dnl @ ../doc/m4.texinfo:1859: Origin of test

 

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dnl @ Copyright (C) 2006 Free Software Foundation

 

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dnl @ This file is free software; the Free Software Foundation

 

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dnl @ gives unlimited permission to copy and/or distribute it

 

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dnl @ with or without modifications, as long as this notice

 

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dnl @ is preserved.

 

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ifdef(`foo', ``foo' is defined', ``foo' is not defined')

 

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dnl @result{}foo is not defined

 

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define(`foo', `')

 

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dnl @result{}

 

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ifdef(`foo', ``foo' is defined', ``foo' is not defined')

 

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dnl @result{}foo is defined

 

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ifdef(`no_such_macro', `yes', `no', `extra argument')

 

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dnl @error{}m4:stdin:4: Warning: excess arguments to builtin `ifdef' ignored

 

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dnl @result{}no

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