From Axel:

Write invocation info into config.log: host info, date, arguments
(one by one, so we can see problems due to quotes). State in
config.log if the architecture is unknown.


git-svn-id: http://root.cern.ch/svn/root/trunk@32891 27541ba8-7e3a-0410-8455-c3a389f83636

configure

@@ -1233,6 +1233,19 @@ Report bugs to <rootdev@root.cern.ch>
 EOF
 }
 
+######################################################################
+#
+### echo %%% Store invocation and machine info in config.log
+#
+logmsg "Invoked on `hostname 2>/dev/null`"
+logmsg "   with `uname -a 2>/dev/null`"
+logmsg "   at `date 2>/dev/null`:"
+
+logmsg "   $0"
+for argv in "$@"; do
+    logmsg "     \"${argv}\""
+done
+
 ######################################################################
 #
 ### echo %%% See if we got the architecture
@@ -1264,6 +1277,7 @@ if `awk '{ print $1 }' $ARCHS | grep "^$arch$" > /dev/null  2>&1` ; then
    echo "Configuring for $arch"
 else
    echo "Invalid architecture. Try $0 --help"
+   logmsg "Invalid architecture \"$arch\"."
    exit 1
 fi