configure: reconfigure: spaces in arguments

* configure (cmdline): We are missing the simple case when the
argument contains spaces or tabs, and no quotes or special
characters.  This causes a badly formatted command line in
reconfigure in common situations like --opt-flags="-O3 -W".

1 files changed, 3 insertions, 0 deletions

diff --git a/configure b/configure
index d3315f95..4e53f0ab 100755
--- a/configure
+++ b/configure
@@ -103,6 +103,9 @@ for arg in "$0" ${@+"$@"} ; do
   *'"'* | *['$*?[(){};&|<>#']* | '~'* )
     cmdline="$cmdline'$arg'"
     ;;
+  *' '* | *'    '* )
+    cmdline="$cmdline\"$arg\""
+    ;;
   * )
     cmdline="$cmdline$arg"
     ;;