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(autoconf.info)Structures

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Structures
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   The following macros check for the presence of certain members in C
structures.  If there is no macro specifically defined to check for a
member you need, then you can use the general structure-member macro
(Note: Generic Structures) or, for more complex tests, you may use
`AC_TRY_COMPILE' (Note: Examining Syntax).

Particular Structures

Macros to check for certain structure members

Generic Structures

How to find other structure members