ENSC_KERNEL_HEADERS: made argument optionally
authorEnrico Scholz <enrico.scholz@informatik.tu-chemnitz.de>
Sat, 14 Feb 2004 01:20:35 +0000 (01:20 +0000)
committerEnrico Scholz <enrico.scholz@informatik.tu-chemnitz.de>
Sat, 14 Feb 2004 01:20:35 +0000 (01:20 +0000)
git-svn-id: http://svn.linux-vserver.org/svn/util-vserver/trunk@891 94cd875c-1c1d-0410-91d2-eb244daf1a30

util-vserver/m4/ensc_kerneldir.m4

index d4a2bdc..8555e67 100644 (file)
@@ -50,6 +50,8 @@ AC_DEFUN([ENSC_KERNEL_HEADERS],
                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
 ])