This patch ensures that the 'tclIndex' files generated by 'auto_mkindex'
are sorted in a deterministic fashion.

Fixes a non-determinism issue reported
at <https://lists.gnu.org/archive/html/guix-devel/2015-10/msg00696.html>.

--- tcl8.6.4/library/auto.tcl	2015-02-26 17:57:28.000000000 +0100
+++ tcl8.6.4/library/auto.tcl	2015-11-13 23:18:34.964831717 +0100
@@ -207,6 +207,9 @@ proc auto_mkindex {dir args} {
 	set args *.tcl
     }
 
+    # Keep file names sorted in a determistic order.
+    set args [lsort -ascii $args]
+
     auto_mkindex_parser::init
     foreach file [glob -- {*}$args] {
 	try {
@@ -241,6 +244,10 @@ proc auto_mkindex_old {dir args} {
     if {![llength $args]} {
 	set args *.tcl
     }
+
+    # Keep file names sorted in a determistic order.
+    set args [lsort -ascii $args]
+
     foreach file [glob -- {*}$args] {
 	set f ""
 	set error [catch {
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<tr><td><span title='2019-03-07 20:05:09 +0100'>2019-03-07</span></td><td><a href='/guix/commit/gnu/build/install.scm?id=0ae735bcc8ff7fdc89d67b492bdee9091ee19e86'>activation: Build account databases with (gnu build accounts).</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2018-11-06 23:21:24 +0100'>2018-11-06</span></td><td><a href='/guix/commit/gnu/build/install.scm?id=c5ce2db56909e7dd3fdcd30fa453272d56b07451'>install: Add 'install-database-and-gc-roots'.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2018-11-06 23:21:23 +0100'>2018-11-06</span></td><td><a href='/guix/commit/gnu/build/install.scm?id=b27ef1d46cfdc3c994b106241f99cd7142083d13'>pack: Import (guix store database) only when '--localstatedir' is passed.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2018-11-06 23:21:23 +0100'>2018-11-06</span></td><td><a href='/guix/commit/gnu/build/install.scm?id=ec4c81fe32a90890a6190443248078ce7366503f'>pack: Move store database creation to a separate derivation.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2018-11-05 00:08:46 +0100'>2018-11-05</span></td><td><a href='/guix/commit/gnu/build/install.scm?id=ab3c60ace3bdd376255463c6475b62f6d17e5978'>install: Parameterize the profile name for 'populate-single-profile-directory'.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2018-10-21 23:54:46 +0200'>2018-10-21</span></td><td><a href='/guix/commit/gnu/build/install.scm?id=aff38cb199fc847f97059600a6c9c99ee754fc07'>install: Make /var/guix/…/guix-profile a relative symlink.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2018-06-14 11:17:00 +0200'>2018-06-14</span></td><td><a href='/guix/commit/gnu/build/install.scm?id=ea0a06cee2ba05451f94714a4f913db02efbe92c'>Remove 'guix-register' and its traces.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2018-06-14 11:17:00 +0200'>2018-06-14</span></td><td><a href='/guix/commit/gnu/build/install.scm?id=eb9fe97495c012c989f76cb42a14cd78f9d94629'>database: Allow for deterministic database construction.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2018-06-14 11:17:00 +0200'>2018-06-14</span></td><td><a href='/guix/commit/gnu/build/install.scm?id=078c2329c0ffc88ac8e334fcea5e025ee6410e62'>install: Use 'reset-timestamps' from (guix store database).</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2018-06-14 11:17:00 +0200'>2018-06-14</span></td><td><a href='/guix/commit/gnu/build/install.scm?id=31a63be8784b2769c2db21388f788a8b975fd4e1'>database: Add 'register-items'.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2018-06-14 11:16:59 +0200'>2018-06-14</span></td><td><a href='/guix/commit/gnu/build/install.scm?id=c45477d2a1a651485feede20fe0f3d15aec48b39'>install: Use (guix store database) instead of 'guix-register'.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2017-05-16 14:41:01 +0200'>2017-05-16</span></td><td><a href='/guix/commit/gnu/build/install.scm?id=9121ce553d267e9fdd4c6b9a268ce9d8677dd234'>bootloader: Adapt vm to new bootloader API.</a><span class='msg-avail'>...</span></td><td>Mathieu Othacehe</td></tr>