From 69d4d74dff077c4587c836052c931fc23a6a9679 Mon Sep 17 00:00:00 2001
From: Ian Lance Taylor <ian@gcc.gnu.org>
Date: Wed, 19 Sep 2012 15:51:16 +0000
Subject: [PATCH] compiler: Ignore byte-order-mark at start of file.

From-SVN: r191485
---
 gcc/go/gofrontend/lex.cc | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/gcc/go/gofrontend/lex.cc b/gcc/go/gofrontend/lex.cc
index 42d444b5fbc..fa9db1f29ac 100644
--- a/gcc/go/gofrontend/lex.cc
+++ b/gcc/go/gofrontend/lex.cc
@@ -722,7 +722,16 @@ Lex::next_token()
 		unsigned int ci;
 		bool issued_error;
 		this->lineoff_ = p - this->linebuf_;
-		this->advance_one_utf8_char(p, &ci, &issued_error);
+		const char *pnext = this->advance_one_utf8_char(p, &ci,
+								&issued_error);
+
+		// Ignore byte order mark at start of file.
+		if (ci == 0xfeff && this->lineno_ == 1 && this->lineoff_ == 0)
+		  {
+		    p = pnext;
+		    break;
+		  }
+
 		if (Lex::is_unicode_letter(ci))
 		  return this->gather_identifier();
 
-- 
2.30.2