Some versions declare open_by_handle_at, but don't define AT_EMPTY_PATH.
Extend the check in configure to test both preconditions.
Signed-off-by: Stefan Weil <s...@weilnetz.de>
---
configure | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/configure b/configure
index 799ad0f..f737f6c 100755
--- a/configure
+++ b/configure
@@ -2816,7 +2816,11 @@ fi
open_by_hande_at=no
cat > $TMPC << EOF
#include <fcntl.h>
+#if !defined(AT_EMPTY_PATH)
+# error missing definition
+#else
int main(void) { struct file_handle fh; return open_by_handle_at(0, &fh, 0); }
+#endif
EOF
if compile_prog "" "" ; then
open_by_handle_at=yes
--
1.7.10
