re PR bootstrap/50237 (bootstrap comparison failure for libcpp/lex.o)

	PR bootstrap/50237
	* internal.h (_cpp_init_lexer): New prototype.
	* init.c (init_library): Call it.
	* lex.c (init_vectorized_lexer): Remove constructor attribute,
	add inline keyword.
	(HAVE_init_vectorized_lexer): Define.
	(_cpp_init_lexer): New function.

From-SVN: r182090

libcpp/ChangeLog

+2011-12-07  Jakub Jelinek  <jakub@redhat.com>
+
+	PR bootstrap/50237
+	* internal.h (_cpp_init_lexer): New prototype.
+	* init.c (init_library): Call it.
+	* lex.c (init_vectorized_lexer): Remove constructor attribute,
+	add inline keyword.
+	(HAVE_init_vectorized_lexer): Define.
+	(_cpp_init_lexer): New function.
+
 2011-12-03  Dodji Seketeli  <dodji@redhat.com>
 
 	* macro.c (tokens_buff_remove_last_token)

libcpp/init.c

@@ -134,6 +134,8 @@ init_library (void)
     {
       initialized = 1;
 
+      _cpp_init_lexer ();
+
       /* Set up the trigraph map.  This doesn't need to do anything if
 	 we were compiled with a compiler that supports C99 designated
 	 initializers.  */

libcpp/internal.h

@@ -653,6 +653,7 @@ extern int _cpp_equiv_tokens (const cpp_token *, const cpp_token *);
 extern void _cpp_init_tokenrun (tokenrun *, unsigned int);
 extern cpp_hashnode *_cpp_lex_identifier (cpp_reader *, const char *);
 extern int _cpp_remaining_tokens_num_in_context (cpp_context *);
+extern void _cpp_init_lexer (void);
 
 /* In init.c.  */
 extern void _cpp_maybe_push_include_file (cpp_reader *);

libcpp/lex.c

@@ -477,7 +477,8 @@ search_line_sse42 (const uchar *s, const uchar *end)
 typedef const uchar * (*search_line_fast_type) (const uchar *, const uchar *);
 static search_line_fast_type search_line_fast;
 
-static void __attribute__((constructor))
+#define HAVE_init_vectorized_lexer 1
+static inline void
 init_vectorized_lexer (void)
 {
   unsigned dummy, ecx = 0, edx = 0;
@@ -638,6 +639,16 @@ search_line_fast (const uchar *s, const uchar *end ATTRIBUTE_UNUSED)
 
 #endif
 
+/* Initialize the lexer if needed.  */
+
+void
+_cpp_init_lexer (void)
+{
+#ifdef HAVE_init_vectorized_lexer
+  init_vectorized_lexer ();
+#endif
+}
+
 /* Returns with a logical line that contains no escaped newlines or
    trigraphs.  This is a time-critical inner loop.  */
 void