build: Generate config.scm at configure time.

* src/cuirass/config.scm.in: New file.
* configure.ac (AC_CONFIG_FILES): Add 'src/cuirass/config.scm'.
* Makefile.am (nodist_pkgmodule_DATA, CLEANFILES, DISTCLEANFILES):
Update.
* .gitignore: Likewise.

.gitignore

@@ -5,14 +5,15 @@
 /INSTALL
 /aclocal.m4
 /autom4te.cache/
+/bin/cuirass
 /build-aux/config.guess
 /build-aux/config.sub
 /build-aux/install-sh
 /build-aux/missing
+/cache/
+/config.cache
 /configure
+/src/cuirass/config.scm
 Makefile
 Makefile.in
 pre-inst-env
-/bin/cuirass
-/config.cache
-/cache/

Makefile.am

@@ -4,7 +4,10 @@ bin_SCRIPTS = bin/cuirass
 noinst_SCRIPTS = pre-inst-env
 
 dist_pkgmodule_DATA = src/cuirass/base.scm
-nodist_pkgmodule_DATA = $(dist_pkgmodule_DATA:%.scm=%.go)
+nodist_pkgmodule_DATA = \
+  $(dist_pkgmodule_DATA:%.scm=%.go) \
+  src/cuirass/config.scm \
+  src/cuirass/config.go
 
 TEST_EXTENSIONS = .scm
 AM_TESTS_ENVIRONMENT = env GUILE_AUTO_COMPILE='0'
@@ -54,7 +57,10 @@ EXTRA_DIST = \
   .dir-locals.el \
   $(TESTS)
 
-CLEANFILES = $(nodist_pkgmodule_DATA)
+DISTCLEANFILES = src/cuirass/config.scm
+CLEANFILES = \
+  $(dist_pkgmodule_DATA:%.scm=%.go) \
+  src/cuirass/config.go
 
 ## -------------- ##
 ## Silent rules.  ##

configure.ac

@@ -19,7 +19,8 @@ pkgmoduledir="${moduledir}/cuirass"
 AC_SUBST([moduledir])
 AC_SUBST([pkgmoduledir])
 
-AC_CONFIG_FILES([Makefile])
+AC_CONFIG_FILES([Makefile
+                 src/cuirass/config.scm])
 AC_CONFIG_FILES([bin/cuirass], [chmod +x bin/cuirass])
 AC_CONFIG_FILES([pre-inst-env:build-aux/pre-inst-env.in],
   [chmod +x pre-inst-env])

src/cuirass/config.scm.in

@@ -0,0 +1,48 @@
+;;;; config.scm - variables defined at configure time
+;;;
+;;; Copyright © 2016 Mathieu Lirzin <mthl@gnu.org>
+;;;
+;;; This file is part of Cuirass.
+;;;
+;;; Cuirass 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 3 of the License, or (at
+;;; your option) any later version.
+;;;
+;;; Cuirass 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 Cuirass.  If not, see <http://www.gnu.org/licenses/>.
+
+(define-module (cuirass config))
+
+(define-public %package
+  ;; Name of package
+  "@PACKAGE@")
+
+(define-public %package-bugreport
+  ;; Define to the address where bug reports for this package should be sent.
+  "@PACKAGE_BUGREPORT@")
+
+(define-public %package-name
+  ;; Define to the full name of this package.
+  "@PACKAGE_NAME@")
+
+(define-public %package-string
+  ;; Define to the full name and version of this package.
+  "@PACKAGE_STRING@")
+
+(define-public %package-tarname
+  ;; Define to the one symbol short name of this package.
+  "@PACKAGE_TARNAME@")
+
+(define-public %package-url
+  ;; Define to the home page for this package.
+  "@PACKAGE_URL@")
+
+(define-public %package-version
+  ;; Define to the version of this package.
+  "@PACKAGE_VERSION@")