From e2be5d5fd8bd8d353567ad02d61bdf32b9dfa66c Mon Sep 17 00:00:00 2001
From: Nick Lewycky <nicholas@mxc.ca>
Date: Tue, 3 Feb 2009 07:10:08 +0000
Subject: [PATCH] Add the ability to pass the path to binutils source to
 configure. This is needed to build the LLVM gold plugin.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@63621 91177308-0d34-0410-b5e6-96231b3b80d8
---
 Makefile.config.in    |  3 +++
 autoconf/configure.ac | 18 ++++++++++++++++++
 2 files changed, 21 insertions(+)

diff --git a/Makefile.config.in b/Makefile.config.in
index bcf1a00e123..90d1a13132e 100644
--- a/Makefile.config.in
+++ b/Makefile.config.in
@@ -283,3 +283,6 @@ ifneq (,$(findstring -mno-cygwin, $(CXX)))
 else
   SYSPATH = $(1)
 endif
+
+# Location of the plugin header file for gold.
+BINUTILS_INCDIR := @BINUTILS_INCDIR@
diff --git a/autoconf/configure.ac b/autoconf/configure.ac
index 3a218eaeb9c..680cc1ddd9d 100644
--- a/autoconf/configure.ac
+++ b/autoconf/configure.ac
@@ -514,6 +514,24 @@ case "$withval" in
   *) AC_MSG_ERROR([Invalid path for --with-ocaml-libdir. Provide full path]) ;;
 esac
 
+dnl Allow linking of LLVM with GPLv3 binutils code.
+AC_ARG_WITH(binutils-include,
+  AS_HELP_STRING([--with-binutils-include],
+    [Specify path to binutils/include/ containing plugin-api.h file for gold plugin.]),,
+  withval=default)
+case "$withval" in
+  default) WITH_BINUTILS_INCDIR=default ;;
+  /* | [[A-Za-z]]:[[\\/]]*)      WITH_BINUTILS_INCDIR=$withval ;;
+  *) AC_MSG_ERROR([Invalid path for --with-binutils-include. Provide full path]) ;;
+esac
+if test "x$WITH_BINUTILS_INCDIR" != xdefault ; then
+  AC_SUBST(BINUTILS_INCDIR,$WITH_BINUTILS_INCDIR)
+  if test ! -f "$WITH_BINUTILS_INCDIR/plugin-api.h"; then
+     echo "$WITH_BINUTILS_INCDIR/plugin-api.h"
+     AC_MSG_ERROR([Invalid path to directory containing plugin-api.h.]);
+  fi
+fi
+
 dnl===-----------------------------------------------------------------------===
 dnl===
 dnl=== SECTION 4: Check for programs we need and that they are the right version
-- 
2.34.1