9.4 Dependencies Between Macros

Some Autoconf macros depend on other macros having been called first in order to work correctly. Autoconf provides a way to ensure that certain macros are called if needed and a way to warn the user if macros are called in an order that might cause incorrect operation.

• Prerequisite Macros: Ensuring required information
• Suggested Ordering: Warning about possible ordering problems
• One-Shot Macros: Ensuring a macro is called only once