FFI: Record ffi.errno().

1 files changed, 8 insertions, 0 deletions

diff --git a/src/lj_vmmath.c b/src/lj_vmmath.c
index ec3d98af..8b177207 100644
--- a/src/lj_vmmath.c
+++ b/src/lj_vmmath.c
@@ -6,6 +6,7 @@
 #define lj_vmmath_c
 #define LUA_CORE
 
+#include <errno.h>
 #include <math.h>
 
 #include "lj_obj.h"
@@ -108,4 +109,11 @@ double lj_vm_foldfpm(double x, int fpm)
 }
 #endif
 
+#if LJ_HASFFI
+int lj_vm_errno(void)
+{
+  return errno;
+}
+#endif
+
 #endif