[committed] hppa: Add gnu_lto_v1 stub

[committed] hppa: Add gnu_lto_v1 stub

[John David Anglin]

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The HP linker for the hppa64-*-hpux* target lacks support for weak 
undefined symbols.  So,
we have a stub archive library to resolve various weak undefined 
symbols.  The attached change
adds a stub for the gnu_lto_v1 symbol.  It is now needed for lto.

Tested on hppa64-hp-hpux11.11.  Committed to trunk.

Dave

-- 
John David Anglin  dave.anglin@bell.net


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2018-01-21  John David Anglin  <danglin@gcc.gnu.org>

	PR lto/83452
	* config/pa/stublib.c (L_gnu_lto_v1): New stub definition.
	* config/pa/t-stublib (gnu_lto_v1-stub.o): Add make fragment.
	
Index: config/pa/stublib.c
===================================================================
--- config/pa/stublib.c	(revision 256664)
+++ config/pa/stublib.c	(working copy)
@@ -115,3 +115,7 @@
   return 0;
 }
 #endif
+
+#ifdef L_gnu_lto_v1
+char gnu_lto_v1;
+#endif
Index: config/pa/t-stublib
===================================================================
--- config/pa/t-stublib	(revision 256664)
+++ config/pa/t-stublib	(working copy)
@@ -3,7 +3,8 @@
 	pthread_default_stacksize_np-stub.o \
 	pthread_mutex_lock-stub.o \
 	pthread_mutex_unlock-stub.o \
-	pthread_once-stub.o
+	pthread_once-stub.o \
+	gnu_lto_v1-stub.o
 
 rfi-stub.o: $(srcdir)/config/pa/stublib.c
 	$(gcc_compile) -c -O2 -DL_register_frame_info $<
@@ -35,6 +36,9 @@
 pthread_once-stub.o: $(srcdir)/config/pa/stublib.c
 	$(gcc_compile) -c -O2 -DL_pthread_once $<
 
+gnu_lto_v1-stub.o: $(srcdir)/config/pa/stublib.c
+	$(gcc_compile) -c -O2 -DL_gnu_lto_v1 $<
+
 libgcc_stub.a: $(LIBGCCSTUB_OBJS)
 	-rm -rf $@
 	$(AR) rc $@ $(LIBGCCSTUB_OBJS)