Linux: Use kbuild to check for UML

[openafs.git] / acinclude.m4

diff --git a/acinclude.m4 b/acinclude.m4
index a88e464..ab229e1 100644 (file)
--- a/acinclude.m4
+++ b/acinclude.m4
@@ -721,10 +721,8 @@ else
                        fi
                        _AFS_SYSNAME=`echo $AFS_SYSNAME|sed s/XX\$/$AFS_SYSKVERS/`
                        AFS_SYSNAME="$_AFS_SYSNAME"
-                       save_CPPFLAGS="$CPPFLAGS"
-                       CPPFLAGS="-I${LINUX_KERNEL_PATH}/include $CPPFLAGS"
-                       AC_TRY_COMPILE(
-                        [#include <linux/autoconf.h>],
+                       AC_TRY_KBUILD(
+                        [],
                         [#ifndef CONFIG_USERMODE
                          #error not UML
                          #endif],
@@ -732,7 +730,6 @@ else
                        if test "${ac_cv_linux_is_uml}" = yes; then
                         _AFS_SYSNAME=`echo $AFS_SYSNAME|sed s/linux/umlinux/`
                        fi
-                       CPPFLAGS="$save_CPPFLAGS"
                        AFS_SYSNAME="$_AFS_SYSNAME"
                        ;;
        esac