If we're building an offloading compiler, always enable the LTO front end.

	* configure.ac [--enable-as-accelerator-for] (enable_languages):
	Make sure it contains lto.
	* configure: Regenerate.

From-SVN: r220838

ChangeLog

+2015-02-20  Thomas Schwinge  <thomas@codesourcery.com>
+
+	* configure.ac [--enable-as-accelerator-for] (enable_languages):
+	Make sure it contains lto.
+	* configure: Regenerate.
+
 2015-02-18  Thomas Schwinge  <thomas@codesourcery.com>
 
 	* configure: Regenerate.

configure

@@ -6218,6 +6218,14 @@ if test -d ${srcdir}/gcc; then
     fi
   fi
 
+  # If we're building an offloading compiler, add the LTO front end.
+  if test x"$enable_as_accelerator_for" != x ; then
+    case ,${enable_languages}, in
+      *,lto,*) ;;
+      *) enable_languages="${enable_languages},lto" ;;
+    esac
+  fi
+
   missing_languages=`echo ",$enable_languages," | sed -e s/,all,/,/ -e s/,c,/,/ `
   potential_languages=,c,
 

configure.ac

@@ -1918,6 +1918,14 @@ if test -d ${srcdir}/gcc; then
     fi
   fi
 
+  # If we're building an offloading compiler, add the LTO front end.
+  if test x"$enable_as_accelerator_for" != x ; then
+    case ,${enable_languages}, in
+      *,lto,*) ;;
+      *) enable_languages="${enable_languages},lto" ;;
+    esac
+  fi
+
   missing_languages=`echo ",$enable_languages," | sed -e s/,all,/,/ -e s/,c,/,/ `
   potential_languages=,c,