1 files changed, 20 insertions, 2 deletions
diff --git a/src/mkskel.sh b/src/mkskel.sh
index 512f1f9..1aa59e1 100755
--- a/src/mkskel.sh
+++ b/src/mkskel.sh
@@ -21,13 +21,31 @@
 #  WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 #  PURPOSE.
 
+if test ! $# = 3; then
+   echo 'Usage: mkskel.sh srcdir m4 version' >&2
+   exit 1
+fi
 echo '/* File created from flex.skl via mkskel.sh */
 
 #include "flexdef.h"
 
 const char *skel[] = {'
-
-sed 's/m4_/m4preproc_/g
+srcdir=$1
+m4=$2
+VERSION=$3
+case $VERSION in
+   *[!0-9.]*) echo 'Invalid version number' >&2; exit 1;;
+esac
+IFS=.
+set $VERSION
+sed 's/4_/a4_/g
+s/m4preproc_/m4_/g
+' "$srcdir/flex.skl" |
+"$m4" -P -I "$srcdir" "-DFLEX_MAJOR_VERSION=$1" \
+   "-DFLEX_MINOR_VERSION=$2" \
+   "-DFLEX_SUBMINOR_VERSION=$3" |
+sed '/^%#/d
+s/m4_/m4preproc_/g
 s/a4_/4_/g
 s/[\\"]/\\&/g
 s/.*/  "&",/'