Fix bootstrap/PR63632

r216566 (r216568 for 4.9 branch) added %{fno-lto} to LINK_COMMAND_SPEC.
However the linker doesn't understand -fno-lto and errors out.
This causes an LTO/PGO bootstrap failure, because -fno-lto is used
during STAGEprofile.
Fixed by filtering out -fno-lto in collect2.c.

From-SVN: r216613

gcc/ChangeLog

+2014-10-24  Markus Trippelsdorf  <markus@trippelsdorf.de>
+
+	PR bootstrap/63632
+	* collect2.c (main): Filter out -fno-lto.
+
 2014-10-24  Martin Liska  <mliska@suse.cz>
 
 	* ipa-icf.c (sem_item_optimizer::parse_nonsingleton_classes): Guard

gcc/collect2.c

@@ -1311,6 +1311,12 @@ main (int argc, char **argv)
 		  ld1--;
 		  ld2--;
 		}
+	      else if (strncmp (arg, "-fno-lto", 8) == 0)
+		{
+		  /* Do not pass -fno-lto to the linker. */
+		  ld1--;
+		  ld2--;
+		}
 #ifdef TARGET_AIX_VERSION
 	      else
 		{

gcc/testsuite/ChangeLog

+2014-10-24  Markus Trippelsdorf  <markus@trippelsdorf.de>
+
+	PR bootstrap/63632
+	* g++.dg/torture/pr63632.C: New test.
+
 2014-10-23  Jonathan Wakely  <jwakely@redhat.com>
 
 	PR c++/63619

gcc/testsuite/g++.dg/torture/pr63632.C

+// PR bootstrap/63632
+// { dg-do link }
+// { dg-options "-fno-lto" }
+
+int main () {}