From: Karel Zak <kzak@redhat.com>
Date: Wed, 31 May 2017 07:35:32 +0000 (+0200)
Subject: build-sys: require kernel headers on Linux
X-Git-Tag: v2.30~26
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8a931412e34647c8bcddc6a6206b850af16a1a2d;p=thirdparty%2Futil-linux.git

build-sys: require kernel headers on Linux

Signed-off-by: Karel Zak <kzak@redhat.com>
---

diff --git a/configure.ac b/configure.ac
index 91c3dd544f..8bb7fb71e0 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>