8.3 Autoconf tests

Autoconf provides tests for particular system features.

When a project uses Autoconf along with Automake, automake checks for the presence of some of these in configure.ac.

Autoconf provides tests for checking for support for various programming languages. See Programming language support for more macros.

Overview of test results. Autoconf macros can indicate their results by substituting an output variable (see AC_SUBST) or by defining a preprocessor symbol (see AC_DEFINE). See the next chapter.