#

# Copyright (c) 1999, 2011, 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.

#  

#

OS_VENDOR = $(shell uname -s)

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

# CC, CXX & AS

# If a SPEC is not set already, then use these defaults.

ifeq ($(SPEC),)

  # When cross-compiling the ALT_COMPILER_PATH points

  # to the cross-compilation toolset

  ifdef CROSS_COMPILE_ARCH

    CXX = $(ALT_COMPILER_PATH)/g++

    CC  = $(ALT_COMPILER_PATH)/gcc

    HOSTCXX = g++

    HOSTCC  = gcc

  else ifneq ($(OS_VENDOR), Darwin)

    CXX = g++

    CC  = gcc

    HOSTCXX = $(CXX)

    HOSTCC  = $(CC)

  endif

  # i486 hotspot requires -mstackrealign on Darwin.

  # llvm-gcc supports this in Xcode 3.2.6 and 4.0.

  # gcc-4.0 supports this on earlier versions.

  # Prefer llvm-gcc where available.

  ifeq ($(OS_VENDOR), Darwin)

    ifeq ($(origin CXX), default)

      CXX = llvm-g++

    endif

    ifeq ($(origin CC), default)

      CC  = llvm-gcc

    endif

    ifeq ($(ARCH), i486)

      LLVM_SUPPORTS_STACKREALIGN := $(shell \

       [ "0"`llvm-gcc -v 2>&1 | grep LLVM | sed -E "s/.*LLVM build ([0-9]+).*/\1/"` -gt "2333" ] \

       && echo true || echo false)

      ifeq ($(LLVM_SUPPORTS_STACKREALIGN), true)

        CXX32 ?= llvm-g++

        CC32  ?= llvm-gcc

      else

        CXX32 ?= g++-4.0

        CC32  ?= gcc-4.0

      endif

      CXX = $(CXX32)

      CC  = $(CC32)

    endif

    HOSTCXX = $(CXX)

    HOSTCC  = $(CC)

  endif

  AS   = $(CC) -c -x assembler-with-cpp

endif

# -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"

# Allow the user to turn off precompiled headers from the command line.

ifneq ($(USE_PRECOMPILED_HEADER),0)

PRECOMPILED_HEADER_DIR=.

PRECOMPILED_HEADER_SRC=$(GAMMADIR)/src/share/vm/precompiled/precompiled.hpp

PRECOMPILED_HEADER=$(PRECOMPILED_HEADER_DIR)/precompiled.hpp.gch

endif

endif

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

# Compiler flags

# position-independent code

PICFLAG = -fPIC

VM_PICFLAG/LIBJVM = $(PICFLAG)

VM_PICFLAG/AOUT   =

VM_PICFLAG        = $(VM_PICFLAG/$(LINK_INTO))

endif

endif

CFLAGS += $(VM_PICFLAG)

CFLAGS += -fno-rtti

CFLAGS += -fno-exceptions

CFLAGS += -pthread

CFLAGS += -fcheck-new

# version 4 and above support fvisibility=hidden (matches jni_x86.h file)

# except 4.1.2 gives pointless warnings that can't be disabled (afaik)

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

CFLAGS += -fvisibility=hidden

endif

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)

# Darwin-specific build flags

ifeq ($(OS_VENDOR), Darwin)

  # Ineffecient 16-byte stack re-alignment on Darwin/IA32

  ARCHFLAG/i486 += -mstackrealign

endif

CFLAGS     += $(ARCHFLAG)

AOUT_FLAGS += $(ARCHFLAG)

LFLAGS     += $(ARCHFLAG)

ASFLAGS    += $(ARCHFLAG)

ifdef E500V2

CFLAGS += -DE500V2

endif

# Use C++ Interpreter

ifdef CC_INTERP

  CFLAGS += -DCC_INTERP

endif

# Build for embedded targets

ifdef JAVASE_EMBEDDED

  CFLAGS += -DJAVASE_EMBEDDED

endif

# Keep temporary files (.ii, .s)

ifdef NEED_ASM

  CFLAGS += -save-temps

else

  CFLAGS += -pipe

endif

# Compiler warnings are treated as errors

ifneq ($(COMPILER_WARNINGS_FATAL),false)

  WARNINGS_ARE_ERRORS = -Werror

endif

# 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/$@)) 

# XXXDARWIN: for _dyld_bind_fully_image_containing_address

ifeq ($(OS_VENDOR), Darwin)

  CFLAGS_WARN/os_bsd.o = $(CFLAGS_WARN/DEFAULT) -Wno-deprecated-declarations

endif

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

ifeq ($(OS_VENDOR), Darwin)

  # use -Os by default, unless -O3 can be proved to be worth the cost, as per policy

  # <http://wikis.sun.com/display/OpenJDK/Mac+OS+X+Port+Compilers>

  OPT_CFLAGS += -Os

else

  OPT_CFLAGS += -O3

endif

# 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

# Flags for generating make dependency flags.

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

DEPFLAGS = -MMD -MP -MF $(DEP_DIR)/$(@:%=%.d)

endif

# -DDONT_USE_PRECOMPILED_HEADER will exclude all includes in precompiled.hpp.

ifeq ($(USE_PRECOMPILED_HEADER),0)

CFLAGS += -DDONT_USE_PRECOMPILED_HEADER

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

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

MAPFLAG = -Xlinker --version-script=FILENAME

#

# Shared Library

#

ifeq ($(OS_VENDOR), Darwin)

  # Standard linker flags

  LFLAGS +=

  # Darwin doesn't use ELF and doesn't support version scripts

  LDNOMAP = true

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

  SONAMEFLAG =

  # Build shared library

  SHARED_FLAG = -Wl,-install_name,@rpath/$(@F) -dynamiclib -compatibility_version 1.0.0 -current_version 1.0.0 $(VM_PICFLAG)

  # Keep symbols even they are not used

  #AOUT_FLAGS += -Xlinker -export-dynamic

else

  # Enable linker optimization

  LFLAGS += -Xlinker -O1

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

  SONAMEFLAG = -Xlinker -soname=SONAME

  # Build shared library

  SHARED_FLAG = -shared $(VM_PICFLAG)

  # Keep symbols even they are not used

  AOUT_FLAGS += -Xlinker -export-dynamic

endif

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

# 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/arm   = -g

DEBUG_CFLAGS/ppc   = -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

# If we are building HEADLESS, pass on to VM

# so it can set the java.awt.headless property

ifdef HEADLESS

CFLAGS += -DHEADLESS

endif

# We are building Embedded for a small device

# favor code space over speed

ifdef MINIMIZE_RAM_USAGE

CFLAGS += -DMINIMIZE_RAM_USAGE

endif