make configure store its command line in config.mak for easy re-run
proper shell quoting and pretty-printing (avoiding ugly gratuitous
quoting and bad quoting style) is included.
diff --git a/configure b/configure
index 949fb03..dfd3d50 100755
--- a/configure
+++ b/configure
@@ -45,6 +45,12 @@
# Helper functions
+quote () {
+tr '\n' ' ' <<EOF | grep '^[-[:alnum:]_=,./:]* $' >/dev/null 2>&1 && { echo "$1" ; return 0 ; }
+$1
+EOF
+printf %s\\n "$1" | sed -e "s/'/'\\\\''/g" -e "1s/^/'/;\$s/\$/'/" -e "s/^'\([-[:alnum:]_,./:]*\)=\(.*\)\$/\1='\2/"
+}
echo () { printf "%s\n" "$*" ; }
fail () { echo "$*" ; exit 1 ; }
fnmatch () { eval "case \"\$2\" in $1) return 0 ;; *) return 1 ;; esac" ; }
@@ -421,11 +427,15 @@
printf "creating config.mak... "
+cmdline=$(quote "$0")
+for i ; do cmdline="$cmdline $(quote "$i")" ; done
+
exec 3>&1 1>config.mak
cat << EOF
-# This version of config.mak was generated by configure
+# This version of config.mak was generated by:
+# $cmdline
# Any changes made here will be lost if configure is re-run
ARCH = $ARCH
SUBARCH = $SUBARCH