From 8a931412e34647c8bcddc6a6206b850af16a1a2d Mon Sep 17 00:00:00 2001
From: Karel Zak
Date: Wed, 31 May 2017 09:35:32 +0200
Subject: build-sys: require kernel headers on Linux

Signed-off-by: Karel Zak <kzak@redhat.com>
---
 configure.ac | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'configure.ac')

diff --git a/configure.ac b/configure.ac
index 91c3dd544..8bb7fb71e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -291,6 +291,7 @@ AC_CHECK_HEADERS([langinfo.h],
 
 dnl Convert some ac_cv_header_* variables to have_*
 dnl
+have_linux_version_h=$ac_cv_header_linux_version_h
 have_linux_blkzoned_h=$ac_cv_header_linux_blkzoned_h
 have_linux_btrfs_h=$ac_cv_header_linux_btrfs_h
 have_linux_raw_h=$ac_cv_header_linux_raw_h
@@ -303,6 +304,11 @@ have_shadow_h=$ac_cv_header_shadow_h
 have_sys_signalfd_h=$ac_cv_header_sys_signalfd_h
 have_utmpx_h=$ac_cv_header_utmpx_h
 
+AS_CASE([$linux_os:$have_linux_version_h],
+  [yes:no],
+    [AC_MSG_ERROR([kernel headers required on Linux])]
+)
+
 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 #include <time.h>
 #include <unistd.h>
-- 
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