diff -Naur elfutils-0.155.orig/configure.ac elfutils-0.155/configure.ac
--- elfutils-0.155.orig/configure.ac	2013-01-26 16:27:55.000000000 -0500
+++ elfutils-0.155/configure.ac	2013-01-26 16:32:15.000000000 -0500
@@ -278,6 +278,9 @@
 AC_DEFINE([USE_DEMANGLE], [1], [Defined if demangling is enabled])])
 AM_CONDITIONAL(DEMANGLE, test "$ac_cv_lib_stdcpp___cxa_demangle" = yes)
 
+dnl Check for __mempcpy
+AC_CHECK_FUNCS_ONCE([__mempcpy])
+
 dnl The directories with content.
 
 dnl Documentation.
--- elfutils-0.155.orig/libelf/elf_begin.c	2013-01-26 16:27:55.000000000 -0500
+++ elfutils-0.155/libelf/elf_begin.c	2013-01-26 16:39:21.000000000 -0500
@@ -801,7 +801,11 @@
     }
 
   /* Copy the raw name over to a NUL terminated buffer.  */
+#ifdef HAVE___MEMPCPY
   *((char *) __mempcpy (elf->state.ar.raw_name, ar_hdr->ar_name, 16)) = '\0';
+#else
+  *((char *) mempcpy (elf->state.ar.raw_name, ar_hdr->ar_name, 16)) = '\0';
+#endif
 
   elf_ar_hdr = &elf->state.ar.elf_ar_hdr;
 
@@ -890,6 +894,7 @@
      filled in which case we cannot simply use atol/l but instead have
      to create a temporary copy.  */
 
+#ifdef HAVE___MEMPCPY
 #define INT_FIELD(FIELD)						      \
   do									      \
     {									      \
@@ -907,6 +912,25 @@
 	elf_ar_hdr->FIELD = (__typeof (elf_ar_hdr->FIELD)) atoll (string);    \
     }									      \
   while (0)
+#else
+#define INT_FIELD(FIELD)						      \
+  do									      \
+    {									      \
+      char buf[sizeof (ar_hdr->FIELD) + 1];				      \
+      const char *string = ar_hdr->FIELD;				      \
+      if (ar_hdr->FIELD[sizeof (ar_hdr->FIELD) - 1] != ' ')		      \
+	{								      \
+	  *((char *) mempcpy (buf, ar_hdr->FIELD, sizeof (ar_hdr->FIELD)))    \
+	    = '\0';							      \
+	  string = buf;							      \
+	}								      \
+      if (sizeof (elf_ar_hdr->FIELD) <= sizeof (long int))		      \
+	elf_ar_hdr->FIELD = (__typeof (elf_ar_hdr->FIELD)) atol (string);     \
+      else								      \
+	elf_ar_hdr->FIELD = (__typeof (elf_ar_hdr->FIELD)) atoll (string);    \
+    }									      \
+  while (0)
+#endif
 
   INT_FIELD (ar_date);
   INT_FIELD (ar_uid);