Got rid of the requirement to have a "package" directive. Fixed a grammar error

found in the process. Also taught the regression test system a new trick: the
path to "fped" can be passed in the environment variable FPED. E.g.,
FPED=fped.r5943 make test

- fped.c (usage, main): duplicating the -T option produces a dump to stdout
  before exiting (like %dump would)
- test/Common: new command fped_dump to invoked fped with a second -T option
- test/Common: if the environment variable FPED is set, use its content to
  invoke fped (default is ../fped)
- test/Common: if the environment variable CWD_PREFIX is set, prepend it to
  $FPED if the latter is a relative path 
- Makefile (test, tests): set CWD_PREFIX to .., so that the path given in FPED
  is valid at the point of invocation
- fpd.y: revised grammar to make "package" optional
- fpd.y: measurements were syntactically allowed inside non-root frame
  (test/structure)
- test/structure: test various combinations of the grammatical file structure
- test/tsort: removed all the now unnecessary "package" directives



git-svn-id: http://svn.openmoko.org/trunk/eda/fped@5944 99fdad57-331a-0410-800a-d7fa5415bdb3

test/Common

@@ -17,7 +17,7 @@ fped()
     echo -n "$1: " 1>&2
     shift
     cat >_in
-    $VALGRIND ../fped -T _in "$@" >_out 2>&1 || {
+    $VALGRIND ${FPED:-../fped} -T _in "$@" >_out 2>&1 || {
 	echo FAILED "($SCRIPT)" 1>&2
 	cat _out
 	rm -f _in _out
@@ -27,12 +27,18 @@ fped()
 }
 
 
+fped_dump()
+{
+	fped "$@" -T
+}
+
+
 fped_fail()
 {
     echo -n "$1: " 1>&2
     shift
     cat >_in
-    $VALGRIND ../fped -T _in "$@" >_out 2>&1 && {
+    $VALGRIND ${FPED:-../fped} -T _in "$@" >_out 2>&1 && {
 	echo FAILED "($SCRIPT)" 1>&2
 	cat _out
 	rm -f _in _out
@@ -54,3 +60,8 @@ expect()
     rm -f _out _diff
     passed=`expr ${passed:-0} + 1`
 }
+
+
+if [ ! -z "$CWD_PREFIX" -a ! -z "$FPED" -a "$FPED" = "${FPED#/}" ]; then
+    FPED="$CWD_PREFIX/$FPED"
+fi