build-system/glib-or-gtk: Allow specific outputs to be excluded from wrapping.

* guix/build/glib-or-gtk-build-system.scm (wrap-all-programs): Add
  #:glib-or-gtk-wrap-excluded-outputs parameter and honor it.
* guix/build-system/glib-or-gtk.scm (glib-or-gtk-build): Add
  #:glib-or-gtk-wrap-excluded-outputs parameter and pass it in BUILDER.
* doc/guix.texi (Build Systems): Mention it.

1 files changed, 7 insertions, 0 deletions

diff --git a/doc/guix.texi b/doc/guix.texi
index 75ce632602..157aecbe33 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -1808,6 +1808,13 @@ modules}.  This is achieved by wrapping the programs in launch scripts
 that appropriately set the @code{XDG_DATA_DIRS} and @code{GTK_PATH}
 environment variables.
 
+It is possible to exclude specific package outputs from that wrapping
+process by listing their names in the
+@code{#:glib-or-gtk-wrap-excluded-outputs} parameter.  This is useful
+when an output is known not to contain any GLib or GTK+ binaries, and
+where wrapping would gratuitously add a dependency of that output on
+GLib and GTK+.
+
 @item glib-or-gtk-compile-schemas
 The phase @code{glib-or-gtk-compile-schemas} makes sure that all GLib's
 @uref{https://developer.gnome.org/gio/stable/glib-compile-schemas.html,