build fix: make buildable with elfutils < 0.142

* dwarf_wrappers.h, loc2c.c: Define DW_TAG_rvalue_reference_type=0x42
  for older elfutils.

1 files changed, 16 insertions, 0 deletions

diff --git a/loc2c.c b/loc2c.c
index 9d58269c..d4cb4666 100644
--- a/loc2c.c
+++ b/loc2c.c
@@ -10,6 +10,22 @@
 #include <assert.h>
 #include "loc2c.h"
 
+#include "config.h"
+
+#include <elfutils/libdw.h>
+#ifdef HAVE_ELFUTILS_VERSION_H
+#include <elfutils/version.h>
+#endif
+
+#if !defined(_ELFUTILS_PREREQ)
+// make a dummy PREREQ check for elfutils < 0.138
+#define _ELFUTILS_PREREQ(major, minor) (0 >= 1)
+#endif
+
+#if ! _ELFUTILS_PREREQ(0,142)
+#define DW_TAG_rvalue_reference_type 0x42
+#endif
+
 #define N_(x) x
 
 #define STACK_TYPE	"intptr_t"  /* Must be the signed type.  */