1 #
   2 # Copyright (c) 2004, 2013, Oracle and/or its affiliates. All rights reserved.
   3 # Copyright (c) 2012, 2013 SAP SE. All rights reserved.
   4 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5 #
   6 # This code is free software; you can redistribute it and/or modify it
   7 # under the terms of the GNU General Public License version 2 only, as
   8 # published by the Free Software Foundation.
   9 #
  10 # This code is distributed in the hope that it will be useful, but WITHOUT
  11 # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12 # FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  13 # version 2 for more details (a copy is included in the LICENSE file that
  14 # accompanied this code).
  15 #
  16 # You should have received a copy of the GNU General Public License version
  17 # 2 along with this work; if not, write to the Free Software Foundation,
  18 # Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  19 #
  20 # Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  21 # or visit www.oracle.com if you need additional information or have any
  22 # questions.
  23 #
  24 #
  25 
  26 # make c code know it is on a 64 bit platform.
  27 CFLAGS += -D_LP64=1
  28 
  29 ifeq ($(origin OPENJDK_TARGET_CPU_ENDIAN),undefined)
  30   # This can happen during hotspot standalone build. Set endianness from
  31   # uname. We assume build and target machines are the same.
  32   OPENJDK_TARGET_CPU_ENDIAN:=$(if $(filter ppc64le,$(shell uname -m)),little,big)
  33 endif
  34 
  35 ifeq ($(filter $(OPENJDK_TARGET_CPU_ENDIAN),big little),)
  36   $(error OPENJDK_TARGET_CPU_ENDIAN value should be 'big' or 'little')
  37 endif
  38 
  39 ifeq ($(OPENJDK_TARGET_CPU_ENDIAN),big)
  40   # fixes `relocation truncated to fit' error for gcc 4.1.
  41   CFLAGS += -mminimal-toc
  42 
  43   # finds use ppc64 instructions, but schedule for power5
  44   CFLAGS += -mcpu=powerpc64 -mtune=power5 -minsert-sched-nops=regroup_exact -mno-multiple -mno-string
  45 else
  46   # Little endian machine uses ELFv2 ABI.
  47   CFLAGS += -DVM_LITTLE_ENDIAN -DABI_ELFv2
  48 
  49   # Use Power8, this is the first CPU to support PPC64 LE with ELFv2 ABI.
  50   CFLAGS += -mcpu=power7 -mtune=power8 -minsert-sched-nops=regroup_exact -mno-multiple -mno-string
  51 endif