| 1 | #!/bin/sh
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| 2 |
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| 3 | LEX="$1"
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| 4 | SRC="$2"
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| 5 | DEST="$3"
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| 6 | shift 3
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| 7 | ARGS="$*"
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| 8 |
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| 9 | dir=`dirname $SRC`
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| 10 | file=`basename $SRC`
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| 11 | base=`basename $SRC .l`
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| 12 | if [ -z "$LEX" ]; then
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| 13 | # if $DEST is more recent than $SRC, we can just touch
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| 14 | # otherwise we touch but print out warnings
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| 15 | if [ -r $DEST ]; then
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| 16 | if [ x`find $SRC -newer $DEST -print` = x$SRC ]; then
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| 17 | echo "warning: lex not found - cannot generate $SRC => $DEST" >&2
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| 18 | echo "warning: lex not found - only updating the timestamp of $DEST" >&2
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| 19 | fi
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| 20 | touch $DEST;
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| 21 | exit;
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| 22 | fi
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| 23 | echo "error: lex not found - cannot generate $SRC => $DEST" >&2
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| 24 | exit 1;
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| 25 | fi
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| 26 | # if $DEST is more recent than $SRC, we can just touch
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| 27 | if [ -r $DEST ]; then
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| 28 | if [ x`find $SRC -newer $DEST -print` != x$SRC ]; then
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| 29 | touch $DEST;
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| 30 | exit;
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| 31 | fi
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| 32 | fi
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| 33 | TOP=`pwd`
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| 34 | echo "info: running $LEX $ARGS $file"
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| 35 | if cd $dir && $LEX $ARGS $file; then
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| 36 | if [ -r lex.yy.c ];then
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| 37 | # we must guarantee that config.h comes first
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| 38 | echo "info: move lex.yy.c to $base.c"
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| 39 | echo "#include \"config.h\"" > $base.c
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| 40 | sed -e "s|lex\.yy\.c|$DEST|" lex.yy.c >> $base.c
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| 41 | rm -f $base.yy.c
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| 42 | elif [ -r $base.yy.c ];then
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| 43 | # we must guarantee that config.h comes first
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| 44 | echo "info: move $base.yy.c to $base.c"
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| 45 | echo "#include \"config.h\"" > $base.c
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| 46 | sed -e "s|$base\.yy\.c|$DEST|" $base.yy.c >> $base.c
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| 47 | rm -f $base.yy.c
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| 48 | elif [ -r $base.c ];then
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| 49 | # we must guarantee that config.h comes first
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| 50 | echo "info: add #include \"config.h\" to $base.c"
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| 51 | mv $base.c $base.c.tmp
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| 52 | echo "#include \"config.h\"" > $base.c
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| 53 | sed -e "s|$base\.yy\.c|$DEST|" $base.c.tmp >> $base.c
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| 54 | rm -f $base.c.tmp
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| 55 | elif [ ! -r base.c ]; then
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| 56 | echo "$base.c nor $base.yy.c nor lex.yy.c generated."
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| 57 | exit 1
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| 58 | fi
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| 59 | fi
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| 60 | cd $TOP
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