4. Commonly Used configure.in macros

This section will cover some commonly used Autoconf Macros.

• 4.1. AC_DEFINE
• 4.2. AC_CHECK_LIB
• 4.3. AC_ARG_ENABLE
• 4.4. AC_OUTPUT
• 4.5. AC_CHECK_FUNCS
• 4.6. AC_CHECK_HEADERS