Example Configurations
Huge Mozilla configure.in
http://lxr.mozilla.org/seamonkey/source/configure.in
M4
Code Snippets
To include an M4 file, use the sinclude function, e.g.
sinclude(build/autoconf/myMacros.m4)
This will also work.
builtin(include, /some/custom/macro.m4)
Important Macros
Checking files.
AC_CHECK_FILE AC_CHECK_FILES
AC_CHECK_LIB
Messages.
AC_MSG_CHECKING AC_MSG_NOTICE AC_MSG_RESULT AC_MSG_WARNING
Links
Guide to writing configure.in
http://www.adp-gmbh.ch/misc/tools/configure/configure_in.html
Current GNU Autoconf manual in PDF