--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/common/autoconf/lib-elf.m4	Sun Dec 11 18:50:18 2016 -0800
@@ -0,0 +1,129 @@
+#
+# Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
+# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+#
+# This code is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License version 2 only, as
+# published by the Free Software Foundation.  Oracle designates this
+# particular file as subject to the "Classpath" exception as provided
+# by Oracle in the LICENSE file that accompanied this code.
+#
+# This code is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+# version 2 for more details (a copy is included in the LICENSE file that
+# accompanied this code).
+#
+# You should have received a copy of the GNU General Public License version
+# 2 along with this work; if not, write to the Free Software Foundation,
+# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+#
+# Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+# or visit www.oracle.com if you need additional information or have any
+# questions.
+#
+
+################################################################################
+# Setup libelf (ELF library)
+################################################################################
+AC_DEFUN_ONCE([LIB_SETUP_LIBELF],
+[
+  AC_ARG_WITH(libelf, [AS_HELP_STRING([--with-libelf],
+      [specify prefix directory for the libelf package
+      (expecting the libraries under PATH/lib and the headers under PATH/include)])])
+  AC_ARG_WITH(libelf-include, [AS_HELP_STRING([--with-libelf-include],
+      [specify directory for the libelf include files])])
+  AC_ARG_WITH(libelf-lib, [AS_HELP_STRING([--with-libelf-lib],
+      [specify directory for the libelf library])])
+
+  if test "x$ENABLE_AOT" = xfalse; then
+    if (test "x${with_libelf}" != x && test "x${with_libelf}" != xno) || \
+        (test "x${with_libelf_include}" != x && test "x${with_libelf_include}" != xno) || \
+        (test "x${with_libelf_lib}" != x && test "x${with_libelf_lib}" != xno); then
+      AC_MSG_WARN([[libelf is not used, so --with-libelf[-*] is ignored]])
+    fi
+    LIBELF_CFLAGS=
+    LIBELF_LIBS=
+  else
+    LIBELF_FOUND=no
+
+    if test "x${with_libelf}" = xno || test "x${with_libelf_include}" = xno || test "x${with_libelf_lib}" = xno; then
+      ENABLE_AOT="false"
+      if test "x${enable_aot}" = xyes; then
+        AC_MSG_ERROR([libelf is explicitly disabled, cannot build AOT. Enable libelf or remove --enable-aot to disable AOT.])
+      fi
+    else
+      if test "x${with_libelf}" != x; then
+        ELF_LIBS="-L${with_libelf}/lib -lelf"
+        ELF_CFLAGS="-I${with_libelf}/include"
+        LIBELF_FOUND=yes
+      fi
+      if test "x${with_libelf_include}" != x; then
+        ELF_CFLAGS="-I${with_libelf_include}"
+        LIBELF_FOUND=yes
+      fi
+      if test "x${with_libelf_lib}" != x; then
+        ELF_LIBS="-L${with_libelf_lib} -lelf"
+        LIBELF_FOUND=yes
+      fi
+      # Do not try pkg-config if we have a sysroot set.
+      if test "x$SYSROOT" = x; then
+        if test "x$LIBELF_FOUND" = xno; then
+          # Figure out ELF_CFLAGS and ELF_LIBS
+          PKG_CHECK_MODULES([ELF], [libelf], [LIBELF_FOUND=yes], [LIBELF_FOUND=no])
+        fi
+      fi
+      if test "x$LIBELF_FOUND" = xno; then
+        AC_CHECK_HEADERS([libelf.h],
+            [
+              LIBELF_FOUND=yes
+              ELF_CFLAGS=
+              ELF_LIBS=-lelf
+            ],
+            [LIBELF_FOUND=no]
+        )
+      fi
+      if test "x$LIBELF_FOUND" = xno; then
+        ENABLE_AOT="false"
+        HELP_MSG_MISSING_DEPENDENCY([elf])
+        if test "x${enable_aot}" = xyes; then
+          AC_MSG_ERROR([libelf not found, cannot build AOT. Remove --enable-aot to disable AOT or: $HELP_MSG])
+        else
+          AC_MSG_WARN([libelf not found, cannot build AOT. $HELP_MSG])
+        fi
+      else
+        AC_MSG_CHECKING([if libelf works])
+        AC_LANG_PUSH(C)
+        OLD_CFLAGS="$CFLAGS"
+        CFLAGS="$CFLAGS $ELF_CFLAGS"
+        OLD_LIBS="$LIBS"
+        LIBS="$LIBS $ELF_LIBS"
+        AC_LINK_IFELSE([AC_LANG_PROGRAM([#include <libelf.h>],
+            [
+              elf_version(0);
+              return 0;
+            ])],
+            [LIBELF_WORKS=yes],
+            [LIBELF_WORKS=no]
+        )
+        CFLAGS="$OLD_CFLAGS"
+        LIBS="$OLD_LIBS"
+        AC_LANG_POP(C)
+        AC_MSG_RESULT([$LIBELF_WORKS])
+
+        if test "x$LIBELF_WORKS" = xno; then
+          ENABLE_AOT="false"
+          HELP_MSG_MISSING_DEPENDENCY([elf])
+          if test "x$enable_aot" = "xyes"; then
+            AC_MSG_ERROR([Found libelf but could not link and compile with it. Remove --enable-aot to disable AOT or: $HELP_MSG])
+          else
+            AC_MSG_WARN([Found libelf but could not link and compile with it. $HELP_MSG])
+          fi
+        fi
+      fi
+    fi
+  fi
+
+  AC_SUBST(ELF_CFLAGS)
+  AC_SUBST(ELF_LIBS)
+])