bug#26346: [PATCH 20/20] doc: Update the documentation for the asdf build systems.

[Andy Patterson]

* doc/guix.texi (Build Systems)<asdf-build-system/source>
<asdf-build-system/sbcl, asdf-build-system/ecl>: Remove the no-longer relevant
parts about naming inputs. Add documentation for the new
parameters #:asd-system-name and #:test-asd-file.
---
 doc/guix.texi | 30 ++++++++++++------------------
 1 file changed, 12 insertions(+), 18 deletions(-)

diff --git a/doc/guix.texi b/doc/guix.texi
index 974d9b3a4..f3a4531a6 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -3346,23 +3346,8 @@ These build systems can also be used to produce 
executable programs, or
 lisp images which contain a set of packages pre-loaded.
 
 The build system uses naming conventions.  For binary packages, the
-package itself as well as its run-time dependencies should begin their
-name with the lisp implementation, such as @code{sbcl-} for
address@hidden/sbcl}.  Beginning the input name with this
-prefix will allow the build system to encode its location into the
-resulting library, so that the input can be found at run-time.
-
-If dependencies are used only for tests, it is convenient to use a
-different prefix in order to avoid having a run-time dependency on such
-systems.  For example,
-
address@hidden
-(define-public sbcl-bordeaux-threads
-  (package
-    ...
-    (native-inputs `(("tests:cl-fiveam" ,sbcl-fiveam)))
-    ...))
address@hidden example
+package name should be prefixed with the lisp implementation, such as
address@hidden for @code{asdf-build-system/sbcl}.
 
 Additionally, the corresponding source package should be labeled using
 the same convention as python packages (see @ref{Python Modules}), using
@@ -3382,7 +3367,16 @@ expressions to be passed as the @code{#:entry-program} 
argument.
 
 If the system is not defined within its own @code{.asd} file of the same
 name, then the @code{#:asd-file} parameter should be used to specify
-which file the system is defined in.
+which file the system is defined in.  Furthermore, if the package
+defines a system for its tests in a separate file, it will be loaded
+before the tests are run if it is specified by the
address@hidden:test-asd-file} parameter.  If it is not set, the files
address@hidden<system>-tests.asd}, @code{<system>-test.asd}, @code{tests.asd},
+and @code{test.asd} will be tried if they exist.
+
+If for some reason the package must be named in a different way than the
+naming conventions suggest, the @code{#:asd-system-name} parameter can
+be used to specify the name of the system.
 
 @end defvr
 
-- 
2.12.2