configure: clean up some shared kernel vars.

Author: philljj

configure.ac

@@ -736,19 +736,26 @@ then
     DEF_FAST_MATH="no"
 fi
 
+#
+# kernel mode variables. Shared by linuxkm, freebsdkm.
+KERNEL_ROOT=""
+HAVE_KERNEL_MODE=no
+
+# Kernel root source tree.
+AC_ARG_WITH([kernel-source],
+    [AS_HELP_STRING([--with-kernel-source=PATH],[PATH to root of kernel build tree])],
+    [KERNEL_ROOT=$withval])
+
+# For backwards comptability.
 AC_ARG_WITH([linux-source],
     [AS_HELP_STRING([--with-linux-source=PATH],[PATH to root of Linux kernel build tree])],
-    [KERNEL_ROOT=$withval],
-    [KERNEL_ROOT=""])
+    [KERNEL_ROOT=$withval])
 
 AC_ARG_WITH([linux-arch],
     [AS_HELP_STRING([--with-linux-arch=arch],[built arch (SRCARCH) of Linux kernel build tree])],
     [KERNEL_ARCH=$withval],
     [KERNEL_ARCH=""])
 
-# Default to no kernel mode.
-HAVE_KERNEL_MODE=no
-
 if test "x$ENABLED_LINUXKM" = "xyes"
 then
     HAVE_KERNEL_MODE=yes
@@ -790,13 +797,6 @@ then
     AM_CFLAGS="$AM_CFLAGS -DNO_DEV_RANDOM -DNO_WRITEV -DNO_STDIO_FILESYSTEM -DWOLFSSL_NO_SOCK -DWOLFSSL_USER_IO"
 fi
 
-#
-# Kernel
-AC_ARG_WITH([kernel-source],
-    [AS_HELP_STRING([--with-kernel-source=PATH],[PATH to root of kernel build tree])],
-    [KERNEL_ROOT=$withval],
-    [KERNEL_ROOT=""])
-
 #
 # FreeBSD
 AC_ARG_WITH([bsd-export-syms],