[PATCHv2 xfsprogs 02/14] configure: error out when LFS does not work

[Felix Janda]

Signed-off-by: Felix Janda <felix.janda at posteo.de>
---
 configure.ac          |  1 +
 m4/package_libcdev.m4 | 16 ++++++++++++++++
 2 files changed, 17 insertions(+)

diff --git a/configure.ac b/configure.ac
index 8fa96a5..ed75d62 100644
--- a/configure.ac
+++ b/configure.ac
@@ -108,6 +108,7 @@ AC_MULTILIB($enable_lib64)
 AC_RT($enable_librt)
 
 AC_SYS_LARGEFILE
+AC_NEED_LFS
 
 AC_PACKAGE_NEED_UUID_H
 AC_PACKAGE_NEED_UUIDCOMPARE
diff --git a/m4/package_libcdev.m4 b/m4/package_libcdev.m4
index 7a847e9..6c94475 100644
--- a/m4/package_libcdev.m4
+++ b/m4/package_libcdev.m4
@@ -265,3 +265,19 @@ AC_DEFUN([AC_HAVE_MREMAP],
        )
     AC_SUBST(have_mremap)
   ])
+
+#
+# Check if transparent LFS is enabled
+#
+AC_DEFUN([AC_NEED_LFS],
+  [ AC_MSG_CHECKING([whether large file support works])
+    AC_TRY_COMPILE([
+#include <unistd.h>
+    ], [
+         int i[sizeof(off_t)-8];
+    ], AC_MSG_RESULT(yes),
+       [AC_MSG_RESULT(no)
+       echo
+       echo 'FATAL ERROR: C library does not support transparent LFS.'
+       exit 1])
+  ])
-- 
2.7.3