#

# Copyright (c) 1999, 2009, Oracle and/or its affiliates. All rights reserved.

# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

#

# This code is free software; you can redistribute it and/or modify it

# under the terms of the GNU General Public License version 2 only, as

# published by the Free Software Foundation.

#

# This code is distributed in the hope that it will be useful, but WITHOUT

# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

# version 2 for more details (a copy is included in the LICENSE file that

# accompanied this code).

#

# You should have received a copy of the GNU General Public License version

# 2 along with this work; if not, write to the Free Software Foundation,

# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

#

# Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

# or visit www.oracle.com if you need additional information or have any

# questions.

#  

#

#------------------------------------------------------------------------

# CC, CPP & AS

CPP = g++

CC  = gcc

AS  = $(CC) -c

# -dumpversion in gcc-2.91 shows "egcs-2.91.66". In later version, it only

# prints the numbers (e.g. "2.95", "3.2.1")

CC_VER_MAJOR := $(shell $(CC) -dumpversion | sed 's/egcs-//' | cut -d'.' -f1)

CC_VER_MINOR := $(shell $(CC) -dumpversion | sed 's/egcs-//' | cut -d'.' -f2)

# check for precompiled headers support

ifneq "$(shell expr \( $(CC_VER_MAJOR) \> 3 \) \| \( \( $(CC_VER_MAJOR) = 3 \) \& \( $(CC_VER_MINOR) \>= 4 \) \))" "0"

USE_PRECOMPILED_HEADER=1

PRECOMPILED_HEADER_DIR=.

PRECOMPILED_HEADER=$(PRECOMPILED_HEADER_DIR)/incls/_precompiled.incl.gch

endif

#------------------------------------------------------------------------

# Compiler flags

# position-independent code

PICFLAG = -fPIC

VM_PICFLAG/LIBJVM = $(PICFLAG)

VM_PICFLAG/AOUT   =

VM_PICFLAG        = $(VM_PICFLAG/$(LINK_INTO))

ifeq ($(ZERO_BUILD), true)

CFLAGS += $(LIBFFI_CFLAGS)

endif

CFLAGS += $(VM_PICFLAG)

CFLAGS += -fno-rtti

CFLAGS += -fno-exceptions

CFLAGS += -D_REENTRANT

CFLAGS += -fcheck-new

ARCHFLAG = $(ARCHFLAG/$(BUILDARCH))

ARCHFLAG/i486    = -m32 -march=i586

ARCHFLAG/amd64   = -m64

ARCHFLAG/ia64    =

ARCHFLAG/sparc   = -m32 -mcpu=v9

ARCHFLAG/sparcv9 = -m64 -mcpu=v9

ARCHFLAG/zero    = $(ZERO_ARCHFLAG)

CFLAGS     += $(ARCHFLAG)

AOUT_FLAGS += $(ARCHFLAG)

LFLAGS     += $(ARCHFLAG)

ASFLAGS    += $(ARCHFLAG)

# Use C++ Interpreter

ifdef CC_INTERP

  CFLAGS += -DCC_INTERP

endif

# Keep temporary files (.ii, .s)

ifdef NEED_ASM

  CFLAGS += -save-temps

else

  CFLAGS += -pipe

endif

# Compiler warnings are treated as errors

WARNINGS_ARE_ERRORS = -Werror

# Except for a few acceptable ones

# Since GCC 4.3, -Wconversion has changed its meanings to warn these implicit

# conversions which might affect the values. To avoid that, we need to turn

# it off explicitly. 

ifneq "$(shell expr \( $(CC_VER_MAJOR) \> 4 \) \| \( \( $(CC_VER_MAJOR) = 4 \) \& \( $(CC_VER_MINOR) \>= 3 \) \))" "0"

ACCEPTABLE_WARNINGS = -Wpointer-arith -Wsign-compare

else

ACCEPTABLE_WARNINGS = -Wpointer-arith -Wconversion -Wsign-compare

endif

CFLAGS_WARN/DEFAULT = $(WARNINGS_ARE_ERRORS) $(ACCEPTABLE_WARNINGS)

# Special cases

CFLAGS_WARN/BYFILE = $(CFLAGS_WARN/$@)$(CFLAGS_WARN/DEFAULT$(CFLAGS_WARN/$@)) 

# The flags to use for an Optimized g++ build

OPT_CFLAGS += -O3

# Hotspot uses very unstrict aliasing turn this optimization off

OPT_CFLAGS += -fno-strict-aliasing

# The gcc compiler segv's on ia64 when compiling bytecodeInterpreter.cpp 

# if we use expensive-optimizations

ifeq ($(BUILDARCH), ia64)

OPT_CFLAGS += -fno-expensive-optimizations

endif

OPT_CFLAGS/NOOPT=-O0

# 6835796. Problem in GCC 4.3.0 with mulnode.o optimized compilation. 

ifneq "$(shell expr \( \( $(CC_VER_MAJOR) = 4 \) \& \( $(CC_VER_MINOR) = 3 \) \))" "0"

OPT_CFLAGS/mulnode.o += -O0

endif

#------------------------------------------------------------------------

# Linker flags

# statically link libstdc++.so, work with gcc but ignored by g++

STATIC_STDCXX = -Wl,-Bstatic -lstdc++ -Wl,-Bdynamic

# statically link libgcc and/or libgcc_s, libgcc does not exist before gcc-3.x.

ifneq ("${CC_VER_MAJOR}", "2")

STATIC_LIBGCC += -static-libgcc

endif

ifeq ($(BUILDARCH), ia64)

LFLAGS += -Wl,-relax

endif

# Enable linker optimization

LFLAGS += -Xlinker -O1

# If this is a --hash-style=gnu system, use --hash-style=both

#   The gnu .hash section won't work on some Linux systems like SuSE 10.

_HAS_HASH_STYLE_GNU:=$(shell $(CC) -dumpspecs | grep -- '--hash-style=gnu')

ifneq ($(_HAS_HASH_STYLE_GNU),)

  LDFLAGS_HASH_STYLE = -Wl,--hash-style=both

endif

LFLAGS += $(LDFLAGS_HASH_STYLE)

# Use $(MAPFLAG:FILENAME=real_file_name) to specify a map file.

MAPFLAG = -Xlinker --version-script=FILENAME

# Use $(SONAMEFLAG:SONAME=soname) to specify the intrinsic name of a shared obj

SONAMEFLAG = -Xlinker -soname=SONAME

# Build shared library

SHARED_FLAG = -shared

# Keep symbols even they are not used

AOUT_FLAGS += -export-dynamic

#------------------------------------------------------------------------

# Debug flags

# Use the stabs format for debugging information (this is the default

# on gcc-2.91). It's good enough, has all the information about line

# numbers and local variables, and libjvm_g.so is only about 16M.

# Change this back to "-g" if you want the most expressive format.

# (warning: that could easily inflate libjvm_g.so to 150M!)

# Note: The Itanium gcc compiler crashes when using -gstabs.

DEBUG_CFLAGS/ia64  = -g

DEBUG_CFLAGS/amd64 = -g

DEBUG_CFLAGS += $(DEBUG_CFLAGS/$(BUILDARCH))

ifeq ($(DEBUG_CFLAGS/$(BUILDARCH)),)

DEBUG_CFLAGS += -gstabs

endif

# DEBUG_BINARIES overrides everything, use full -g debug information

ifeq ($(DEBUG_BINARIES), true)

  DEBUG_CFLAGS = -g

  CFLAGS += $(DEBUG_CFLAGS)

endif