re PR lto/41597 (Bad .comm directive)

2010-01-02  Richard Guenther  <rguenther@suse.de>

	PR lto/41597
	* toplev.c (compile_file): Emit LTO marker properly.  Change
	it to __gnu_lto_v1.
	* collect2.c (scan_prog_file): Adjust for changed LTO marker.

From-SVN: r155563

gcc/ChangeLog

+2010-01-02  Richard Guenther  <rguenther@suse.de>
+
+	PR lto/41597
+	* toplev.c (compile_file): Emit LTO marker properly.  Change
+	it to __gnu_lto_v1.
+	* collect2.c (scan_prog_file): Adjust for changed LTO marker.
+
 2010-01-01  Richard Guenther  <rguenther@suse.de>
 
 	PR debug/42455

gcc/collect2.c

 /* Collect static initialization info into data structures that can be
    traversed by C++ initialization and finalization routines.
    Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998,
-   1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008, 2009
+   1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008, 2009, 2010
    Free Software Foundation, Inc.
    Contributed by Chris Smith (csmith@convex.com).
    Heavily modified by Michael Meissner (meissner@cygnus.com),
@@ -2634,8 +2634,8 @@ scan_prog_file (const char *prog_name, scanpass which_pass,
              the LTO objects list if found.  */
           for (p = buf; (ch = *p) != '\0' && ch != '\n'; p++)
             if (ch == ' '
-		&& (strncmp (p +1 , "gnu_lto_v1", 10) == 0)
-		&& ISSPACE( p[11]))
+		&& (strncmp (p + 1, "__gnu_lto_v1", 12) == 0)
+		&& ISSPACE (p[13]))
               {
                 add_lto_object (&lto_objects, prog_name);
 

gcc/toplev.c

 /* Top level of GCC compilers (cc1, cc1plus, etc.)
    Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
-   1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
+   1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
    Free Software Foundation, Inc.
 
 This file is part of GCC.
@@ -1104,7 +1104,20 @@ compile_file (void)
      link errors if an object file with IL is stored into a shared
      library without invoking lto1.  */
   if (flag_generate_lto)
-    fprintf (asm_out_file,"\t.comm\tgnu_lto_v1,1,1\n");
+    {
+#if defined ASM_OUTPUT_ALIGNED_DECL_COMMON
+      ASM_OUTPUT_ALIGNED_DECL_COMMON (asm_out_file, NULL_TREE,
+				      "__gnu_lto_v1",
+				      (unsigned HOST_WIDE_INT) 1, 8);
+#elif defined ASM_OUTPUT_ALIGNED_COMMON
+      ASM_OUTPUT_ALIGNED_COMMON (asm_out_file, "__gnu_lto_v1",
+				 (unsigned HOST_WIDE_INT) 1, 8);
+#else
+      ASM_OUTPUT_COMMON (asm_out_file, "__gnu_lto_v1",
+			 (unsigned HOST_WIDE_INT) 1,
+			 (unsigned HOST_WIDE_INT) 1);
+#endif
+    }
 
   /* Attach a special .ident directive to the end of the file to identify
      the version of GCC which compiled this code.  The format of the .ident