build: Check for Guile-SQLite3.

* m4/guix.m4 (GUIX_CHECK_GUILE_SQLITE3): New macro.
* configure.ac: Use it and define 'HAVE_GUILE_SQLITE3'.
* guix/self.scm (specification->package): Add "guile-sqlite3".
(compiled-guix)[guile-sqlite3]: New variable.
[dependencies]: Add it.

configure.ac

@@ -124,6 +124,11 @@ dnl Guile-JSON is used in various places.
 GUILE_MODULE_AVAILABLE([have_guile_json], [(json)])
 AM_CONDITIONAL([HAVE_GUILE_JSON], [test "x$have_guile_json" = "xyes"])
 
+dnl Guile-Sqlite3 is used by the (guix store ...) modules.
+GUIX_CHECK_GUILE_SQLITE3
+AM_CONDITIONAL([HAVE_GUILE_SQLITE3],
+  [test "x$guix_cv_have_recent_guile_sqlite3" = "xyes"])
+
 dnl Make sure we have a full-fledged Guile.
 GUIX_ASSERT_GUILE_FEATURES([regex posix socket net-db threads])
 

guix/self.scm

@@ -82,6 +82,7 @@ GUILE-VERSION (\"2.0\" or \"2.2\"), or #f if none of the packages matches."
       ("guile-json" (ref '(gnu packages guile) 'guile-json))
       ("guile-ssh"  (ref '(gnu packages ssh)   'guile-ssh))
       ("guile-git"  (ref '(gnu packages guile) 'guile-git))
+      ("guile-sqlite3" (ref '(gnu packages guile) 'guile-sqlite3))
       ("libgcrypt"  (ref '(gnu packages gnupg) 'libgcrypt))
       ("zlib"       (ref '(gnu packages compression) 'zlib))
       ("gzip"       (ref '(gnu packages compression) 'gzip))
@@ -92,6 +93,7 @@ GUILE-VERSION (\"2.0\" or \"2.2\"), or #f if none of the packages matches."
       ("guile2.0-json" (ref '(gnu packages guile) 'guile2.0-json))
       ("guile2.0-ssh"  (ref '(gnu packages ssh) 'guile2.0-ssh))
       ("guile2.0-git"  (ref '(gnu packages guile) 'guile2.0-git))
+      ;; XXX: No "guile2.0-sqlite3".
       (_               #f))))                     ;no such package
 
 
@@ -216,11 +218,16 @@ list of file-name/file-like objects suitable as inputs to 'imported-files'."
                        "guile2.0-git"))
 
 
+  (define guile-sqlite3
+    (package-for-guile guile-version
+                       "guile-sqlite3"
+                       "guile2.0-sqlite3"))
+
   (define dependencies
     (match (append-map (lambda (package)
                          (cons (list "x" package)
                                (package-transitive-propagated-inputs package)))
-                       (list guile-git guile-json guile-ssh))
+                       (list guile-git guile-json guile-ssh guile-sqlite3))
       (((labels packages _ ...) ...)
        packages)))
 

m4/guix.m4

@@ -174,6 +174,24 @@ AC_DEFUN([GUIX_CHECK_GUILE_SSH], [
      fi])
 ])
 
+dnl GUIX_CHECK_GUILE_SQLITE3
+dnl
+dnl Check whether a recent-enough Guile-Sqlite3 is available.
+AC_DEFUN([GUIX_CHECK_GUILE_SQLITE3], [
+  dnl Check whether 'sqlite-bind-arguments' is available.  It was introduced
+  dnl in February 2018:
+  dnl <https://notabug.org/civodul/guile-sqlite3/commit/1cd1dec96a9999db48c0ff45bab907efc637247f>.
+  AC_CACHE_CHECK([whether Guile-Sqlite3 is available and recent enough],
+    [guix_cv_have_recent_guile_sqlite3],
+    [GUILE_CHECK([retval],
+      [(@ (sqlite3) sqlite-bind-arguments)])
+     if test "$retval" = 0; then
+       guix_cv_have_recent_guile_sqlite3="yes"
+     else
+       guix_cv_have_recent_guile_sqlite3="no"
+     fi])
+])
+
 dnl GUIX_TEST_ROOT_DIRECTORY
 AC_DEFUN([GUIX_TEST_ROOT_DIRECTORY], [
   AC_CACHE_CHECK([for unit test root directory],