The following macros check for the declaration of variables and
functions. If there is no macro specifically defined to check for a
symbol you need, then you can use the general macros (see Generic Declarations) or, for more complex tests, you may use
AC_COMPILE_IFELSE (see Running the Compiler).
|• Particular Declarations||Macros to check for certain declarations|
|• Generic Declarations||How to find other declarations|