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doc: Document 'glib-or-gtk-build-system'.

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* doc/guix.texi (Build System): Document 'glib-or-gtk-build-system'.

Co-authored-by: Ludovic Courtès <ludo@gnu.org>
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Federico Beffa 2014-10-08 21:04:25 +02:00 committed by Ludovic Courtès
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@ -1642,6 +1642,35 @@ debugging information''), which roughly means that code is compiled with
@code{-O2 -g}, as is the case for Autoconf-based packages by default.
@end defvr
@defvr {Scheme Variable} glib-or-gtk-build-system
This variable is exported by @code{(guix build-system glib-or-gtk)}. It
is intended for use with packages making use of GLib or GTK+.
This build system adds the following two phases to the ones defined by
@var{gnu-build-system}:
@table @code
@item glib-or-gtk-wrap
The phase @code{glib-or-gtk-wrap} ensures that programs found under
@file{bin/} are able to find GLib's ``schemas'' and
@uref{https://developer.gnome.org/gtk3/stable/gtk-running.html, GTK+
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.
@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,
GSettings schemas} are compiled. Compilation is performed by the
@command{glib-compile-schemas} program. It is provided by the package
@code{glib:bin} which is automatically imported by the build system.
The @code{glib} package providing @command{glib-compile-schemas} can be
specified with the @code{#:glib} parameter.
@end table
Both phases are executed after the @code{install} phase.
@end defvr
@defvr {Scheme Variable} python-build-system
This variable is exported by @code{(guix build-system python)}. It
implements the more or less standard build procedure used by Python