-dnl $Id: ensc_kerneldir.m4,v 1.1.2.2 2004/01/26 18:21:28 ensc Exp $
+dnl $Id: ensc_kerneldir.m4,v 1.3 2004/02/14 01:20:35 ensc Exp $
dnl Copyright (C) 2002 Enrico Scholz <enrico.scholz@informatik.tu-chemnitz.de>
dnl
ensc_cv_path_kernelheaders=$ensc_cv_path_kerneldir/include
])
- $1=$ensc_cv_path_kernelheaders
- AC_SUBST($1)
+ if test x"$1" != x; then
+ $1=$ensc_cv_path_kernelheaders
+ AC_SUBST($1)
+ fi
])