If we don't support a particular kernel version, don't print out a
warning and pretend that we can actually handle the situation. Just
print an error and stop immediately.

Signed-off-by: Jason Gerecke <jason.gere...@wacom.com>
---
 configure.ac | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/configure.ac b/configure.ac
index d16ba0a..4ee8b80 100644
--- a/configure.ac
+++ b/configure.ac
@@ -39,7 +39,7 @@ AC_MSG_CHECKING(kernel version)
 AC_MSG_RESULT([$MODUTS])
 MINOR=`echo $MODUTS | sed 's/[[0-9]]*\.[[0-9]]*\.\([[0-9]]*\).*/\1/'`
 if echo $MODUTS | grep "^2.4" >/dev/null; then
-       AC_MSG_WARN([kernel 2.4.x is not supported])
+       AC_MSG_ERROR([kernel 2.4.x is not supported])
 elif echo $MODUTS | grep "^2.6" >/dev/null; then
        if test $MINOR -ge 26; then
                case $MINOR in
@@ -48,7 +48,7 @@ elif echo $MODUTS | grep "^2.6" >/dev/null; then
                        *) WCM_KERNEL_VER="2.6.38";;
                esac
        else
-               AC_MSG_WARN([kernels older than 2.6.26 is supported by 
linuxwacom])
+               AC_MSG_ERROR([use the kernel driver included in the 
'linuxwacom' package for kernels older than 2.6.26])
        fi
 elif echo $MODUTS | grep "^3." >/dev/null; then
        MINOR=`echo $MODUTS | sed 's/[[0-9]]*\.\([[0-9]]*\).*/\1/'`
@@ -62,7 +62,7 @@ elif echo $MODUTS | grep "^3." >/dev/null; then
 elif echo $MODUTS | grep "^4." >/dev/null; then
        WCM_KERNEL_VER="3.17"
 else
-       AC_MSG_WARN(kernel version $MODUTS not supported)
+       AC_MSG_ERROR(kernel version $MODUTS not supported)
 fi
 
 dnl Check for kernel build environment
-- 
2.3.5


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