--- a/gcc/config/rs6000/t-aix52	Sun Aug 21 07:07:55 2011 +0900
+++ b/gcc/config/rs6000/t-aix52	Fri Oct 27 22:46:09 2017 +0900
@@ -1,5 +1,4 @@
-# Copyright (C) 2002, 2003, 2004, 2005, 2006,
-# 2008 Free Software Foundation, Inc.
+# Copyright (C) 2002-2017 Free Software Foundation, Inc.
 #
 # This file is part of GCC.
 #
@@ -17,18 +16,6 @@
 # along with GCC; see the file COPYING3.  If not see
 # <http://www.gnu.org/licenses/>.
 
-# We want fine grained libraries, so use the new code to build the
-# floating point emulation libraries.
-FPBIT = fp-bit.c
-DPBIT = dp-bit.c
-
-dp-bit.c: $(srcdir)/config/fp-bit.c
-	cat $(srcdir)/config/fp-bit.c > dp-bit.c
-
-fp-bit.c: $(srcdir)/config/fp-bit.c
-	echo '#define FLOAT' > fp-bit.c
-	cat $(srcdir)/config/fp-bit.c >> fp-bit.c
-
 # Build the libraries for pthread and all of the 
 # different processor models
 
@@ -37,39 +24,3 @@
 MULTILIB_DIRNAMES	= pthread ppc64
 
 MULTILIB_MATCHES	= 
-
-LIBGCC = stmp-multilib
-INSTALL_LIBGCC = install-multilib
-
-# Build a shared libgcc library.
-SHLIB_EXT = .a
-SHLIB_LINK = $(GCC_FOR_TARGET) $(LIBGCC2_CFLAGS) -shared -nodefaultlibs \
-	-Wl,-bE:@shlib_map_file@ -o @multilib_dir@/shr.o \
-	@multilib_flags@ @shlib_objs@ -lc \
-	`case @multilib_dir@ in \
-	*pthread*) echo -L$(TARGET_SYSTEM_ROOT)/usr/lib/threads -lpthreads -lc_r $(TARGET_SYSTEM_ROOT)/usr/lib/libc.a ;; \
-	*) echo -lc ;; esac` ; \
-	rm -f @multilib_dir@/tmp-@shlib_base_name@.a ; \
-	$(AR_CREATE_FOR_TARGET) @multilib_dir@/tmp-@shlib_base_name@.a \
-	@multilib_dir@/shr.o ; \
-	mv @multilib_dir@/tmp-@shlib_base_name@.a \
-	   @multilib_dir@/@shlib_base_name@.a ; \
-	rm -f @multilib_dir@/shr.o
-# $(slibdir) double quoted to protect it from expansion while building
-# libgcc.mk.  We want this delayed until actual install time.
-SHLIB_INSTALL = \
-	$$(mkinstalldirs) $$(DESTDIR)$$(slibdir)@shlib_slibdir_qual@; \
-	$(INSTALL_DATA) @multilib_dir@/@shlib_base_name@.a \
-		$$(DESTDIR)$$(slibdir)@shlib_slibdir_qual@/
-SHLIB_LIBS = -lc `case @multilib_dir@ in *pthread*) echo -lpthread ;; esac`
-SHLIB_MKMAP = $(srcdir)/mkmap-flat.awk
-SHLIB_MAPFILES = $(srcdir)/libgcc-std.ver $(srcdir)/config/rs6000/libgcc-ppc64.ver
-SHLIB_NM_FLAGS = -Bpg -X32_64
-
-# GCC 128-bit long double support routines.
-LIB2FUNCS_EXTRA = $(srcdir)/config/rs6000/ppc64-fp.c \
-	$(srcdir)/config/rs6000/darwin-ldouble.c
-TARGET_LIBGCC2_CFLAGS = -mlong-double-128
-
-# Either 32-bit and 64-bit objects in archives.
-AR_FLAGS_FOR_TARGET = -X32_64