— Macro: AC_INIT (package, version, [bug-report], [tarname], [url])

Process any command-line arguments and perform various initializations and verifications.

Set the name of the package and its version. These are typically used in --version support, including that of configure. The optional argument bug-report should be the email to which users should send bug reports. The package tarname differs from package: the latter designates the full package name (e.g., ‘GNU Autoconf’), while the former is meant for distribution tar ball names (e.g., ‘autoconf’). It defaults to package with ‘GNU ’ stripped, lower-cased, and all characters other than alphanumerics and underscores are changed to ‘-’. If provided, url should be the home page for the package.

It is preferable that the arguments of AC_INIT be static, i.e., there should not be any shell computation, but they can be computed by M4.

The following M4 macros (e.g., AC_PACKAGE_NAME), output variables (e.g., PACKAGE_NAME), and preprocessor symbols (e.g., PACKAGE_NAME), are defined by AC_INIT:

AC_PACKAGE_NAME, PACKAGE_NAME

Exactly package.

AC_PACKAGE_TARNAME, PACKAGE_TARNAME

Exactly tarname, possibly generated from package.

AC_PACKAGE_VERSION, PACKAGE_VERSION

Exactly version.

AC_PACKAGE_STRING, PACKAGE_STRING

Exactly ‘package version’.

AC_PACKAGE_BUGREPORT, PACKAGE_BUGREPORT

Exactly bug-report, if one was provided.

AC_PACKAGE_URL, PACKAGE_URL

Exactly url, if one was provided. If url was empty, but package begins with ‘GNU ’, then this defaults to ‘http://www.gnu.org/software/tarname/’, otherwise, no URL is assumed.