[PATCH 06/13] Installed header hygiene (BZ#20366): Macros used in #if without checking whether they are defined.

Joseph Myers joseph@codesourcery.com
Wed Sep 21 18:05:00 GMT 2016


On Wed, 21 Sep 2016, Carlos O'Donell wrote:

> At a high level I would expect _LIBC to always be defined as either 0 or 1.

_LIBC is effectively with external code, because it's used (with #if) in 
code shared by gnulib.  So we can't change its semantics like that; 
defining to 0 with installed glibc would break building gnulib.

-- 
Joseph S. Myers
joseph@codesourcery.com



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