build: Add 'waf-build-system'.

* guix/build-system/waf.scm,
  guix/build/waf-build-system.scm: New files.
* Makefile.am (MODULES): Add them.
* doc/guix.texi (Build Systems): Document waf-build-system.

1 files changed, 12 insertions, 0 deletions

diff --git a/doc/guix.texi b/doc/guix.texi
index 4e99254b19..9fa0bd8f84 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -1913,6 +1913,18 @@ Which Ruby package is used can be specified with the @code{#:ruby}
 parameter.
 @end defvr
 
+@defvr {Scheme Variable} waf-build-system
+This variable is exported by @code{(guix build-system waf)}.  It
+implements a build procedure around the @code{waf} script.  The common
+phases---@code{configure}, @code{build}, and @code{install}---are
+implemented by passing their names as arguments to the @code{waf}
+script.
+
+The @code{waf} script is executed by the Python interpreter.  Which
+Python package is used to run the script can be specified with the
+@code{#:python} parameter.
+@end defvr
+
 Lastly, for packages that do not need anything as sophisticated, a
 ``trivial'' build system is provided.  It is trivial in the sense that
 it provides basically no support: it does not pull any implicit inputs,