[PATCH v3 3/3] internal.h: Make LFS mandatory for all usecases

[Khem Raj]

erosfs depend on the consistent use of a 64bit offset
type, force downstreams to use transparent LFS (_FILE_OFFSET_BITS=64),
so that it becomes impossible for them to use 32bit interfaces.

Signed-off-by: Khem Raj <raj.khem at gmail.com>
---
 include/erofs/internal.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/include/erofs/internal.h b/include/erofs/internal.h
index 6a70f11..d3b2986 100644
--- a/include/erofs/internal.h
+++ b/include/erofs/internal.h
@@ -21,6 +21,7 @@ typedef unsigned short umode_t;
 
 #include "erofs_fs.h"
 #include <fcntl.h>
+#include <sys/types.h> /* for off_t definition */
 
 #ifndef PATH_MAX
 #define PATH_MAX        4096    /* # chars in a path name including nul */
@@ -104,6 +105,10 @@ struct erofs_sb_info {
 	};
 };
 
+
+/* make sure that any user of the erofs headers has atleast 64bit off_t type */
+extern int erofs_assert_largefile[sizeof(off_t)-8];
+
 /* global sbi */
 extern struct erofs_sb_info sbi;
 
-- 
2.39.0