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AX_PKG_SWIG([major.minor.micro], [action-if-found], [action-if-not-found])


This macro searches for a SWIG installation on your system. If found, then SWIG is AC_SUBST’d; if not found, then $SWIG is empty. If SWIG is found, then SWIG_LIB is set to the SWIG library path, and AC_SUBST’d.

You can use the optional first argument to check if the version of the available SWIG is greater than or equal to the value of the argument. It should have the format: N[.N[.N]] (N is a number between 0 and 999. Only the first N is mandatory.) If the version argument is given (e.g. 1.3.17), AX_PKG_SWIG checks that the swig package is this version number or higher.

As usual, action-if-found is executed if SWIG is found, otherwise action-if-not-found is executed.

In, use as:

  AX_PKG_SWIG(1.3.17, [], [ AC_MSG_ERROR([SWIG is required to build..]) ])

Source Code

Download the latest version of ax_pkg_swig.m4 or browse the macro’s revision history.


Copyright © 2008 Sebastian Huber
Copyright © 2008 Alan W. Irwin
Copyright © 2008 Rafael Laboissiere
Copyright © 2008 Andrew Collier
Copyright © 2011 Murray Cumming
Copyright © 2018 Reini Urban
Copyright © 2021 Vincent Danjean

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see <>.

As a special exception, the respective Autoconf Macro’s copyright owner gives unlimited permission to copy, distribute and modify the configure scripts that are the output of Autoconf when processing the Macro. You need not follow the terms of the GNU General Public License when using or distributing such scripts, even though portions of the text of the Macro appear in them. The GNU General Public License (GPL) does govern all other use of the material that constitutes the Autoconf Macro.

This special exception to the GPL applies to versions of the Autoconf Macro released by the Autoconf Archive. When you make and distribute a modified version of the Autoconf Macro, you may extend this special exception to the GPL to apply to your modified version as well.

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