r22307: when no lex or yacc is found:

- just touch $DEST if it's already there and newer than $SRC
- touch $DEST if it's already there but older than $SRC and print warnings
  to stderr
- otherwise return an error

when lex or yacc is found:
- just touch $DEST if it's already there and newer than $SRC
- otherwise regenerate $DEST from $SRC using lex or yacc

I don't like that every 'make' tries to regenerate because the timestamp
of $DEST is never updated...

metze
(This used to be commit 10ed5c39692ff4a6b61ec9c6d046b2ee2202fc02)

1 files changed, 14 insertions, 2 deletions

diff --git a/source4/script/lex_compile.sh b/source4/script/lex_compile.sh
index 064bf89bea..2f9498e5ac 100755
--- a/source4/script/lex_compile.sh
+++ b/source4/script/lex_compile.sh
@@ -8,11 +8,23 @@ dir=`dirname $SRC`
 file=`basename $SRC`
 base=`basename $SRC .l`
 if [ -z "$LEX" ]; then
-	echo "lex not found - not regenerating $DEST"
-	exit;
+	# if $DEST is more recent than $SRC, we can just touch
+	# otherwise we touch but print out warnings
+	if [ -r $DEST ]; then
+		if [ x`find $SRC -newer $DEST -print` = x$SRC ]; then
+			echo "warning: lex not found - cannot generate $SRC => $DEST" >&2
+			echo "warning: lex not found - only updating the timestamp of $DEST" >&2
+		fi
+		touch $DEST;
+		exit;
+	fi
+	echo "error: lex not found - cannot generate $SRC => $DEST" >&2
+	exit 1;
 fi
+# if $DEST is more recent than $SRC, we can just touch
 if [ -r $DEST ]; then
 	if [ x`find $SRC -newer $DEST -print` != x$SRC ]; then
+		touch $DEST;
 		exit;
 	fi
 fi