#

# Copyright (c) 1999, 2013, 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, 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

    STRIP = $(ALT_COMPILER_PATH)/strip

  else

    ifeq ($(USE_CLANG), true)

      CXX = clang++

      CC  = clang

    else

      CXX = g++

      CC  = gcc

    endif

    HOSTCXX = $(CXX)

    HOSTCC  = $(CC)

    STRIP = strip

  endif

  AS  = $(CC) -c

endif

ifeq ($(USE_CLANG), true)

  CC_VER_MAJOR := $(shell $(CC) -v 2>&1 | grep version | sed "s/.*version \([0-9]*\.[0-9]*\).*/\1/" | cut -d'.' -f1)

  CC_VER_MINOR := $(shell $(CC) -v 2>&1 | grep version | sed "s/.*version \([0-9]*\.[0-9]*\).*/\1/" | cut -d'.' -f2)

else

  # -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)

endif

ifeq ($(USE_CLANG), true)

  # Clang has precompiled headers support by default, but the user can switch

  # it off by using 'USE_PRECOMPILED_HEADER=0'.

  ifdef LP64

    ifeq ($(USE_PRECOMPILED_HEADER),)

      USE_PRECOMPILED_HEADER=1

    endif

  else

    # We don't support precompiled headers on 32-bit builds because there some files are

    # compiled with -fPIC while others are compiled without (see 'NONPIC_OBJ_FILES' rules.make)

    # Clang produces an error if the PCH file was compiled with other options than the actual compilation unit.

    USE_PRECOMPILED_HEADER=0

  endif

  ifeq ($(USE_PRECOMPILED_HEADER),1)

    ifndef LP64

      $(error " Precompiled Headers only supported on 64-bit platforms!")

    endif

    PRECOMPILED_HEADER_DIR=.

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

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

    PCH_FLAG = -include precompiled.hpp

    PCH_FLAG/DEFAULT = $(PCH_FLAG)

    PCH_FLAG/NO_PCH = -DNO_PCH

    PCH_FLAG/BY_FILE = $(PCH_FLAG/$@)$(PCH_FLAG/DEFAULT$(PCH_FLAG/$@))

    VM_PCH_FLAG/LIBJVM = $(PCH_FLAG/BY_FILE)

    VM_PCH_FLAG/AOUT =

    VM_PCH_FLAG = $(VM_PCH_FLAG/$(LINK_INTO))

    # We only use precompiled headers for the JVM build

    CFLAGS += $(VM_PCH_FLAG)

    # There are some files which don't like precompiled headers

    # The following files are build with 'OPT_CFLAGS/NOOPT' (-O0) in the opt build.

    # But Clang doesn't support a precompiled header which was compiled with -O3

    # to be used in a compilation unit which uses '-O0'. We could also prepare an

    # extra '-O0' PCH file for the opt build and use it here, but it's probably

    # not worth the effoert as long as only two files need this special handling.

    PCH_FLAG/loopTransform.o = $(PCH_FLAG/NO_PCH)

    PCH_FLAG/sharedRuntimeTrig.o = $(PCH_FLAG/NO_PCH)

    PCH_FLAG/sharedRuntimeTrans.o = $(PCH_FLAG/NO_PCH)

  endif

else # ($(USE_CLANG), true)

  # 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

endif

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

ifeq ($(USE_PRECOMPILED_HEADER),0)

  CFLAGS += -DDONT_USE_PRECOMPILED_HEADER

endif

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

# Compiler flags

# position-independent code

PICFLAG = -fPIC

VM_PICFLAG/LIBJVM = $(PICFLAG)

VM_PICFLAG/AOUT   =

VM_PICFLAG        = $(VM_PICFLAG/$(LINK_INTO))

ifeq ($(JVM_VARIANT_ZERO), true)

CFLAGS += $(LIBFFI_CFLAGS)

endif

ifeq ($(JVM_VARIANT_ZEROSHARK), true)

CFLAGS += $(LIBFFI_CFLAGS)

CFLAGS += $(LLVM_CFLAGS)

endif

CFLAGS += $(VM_PICFLAG)

CFLAGS += -fno-rtti

CFLAGS += -fno-exceptions

CFLAGS += -D_REENTRANT

ifeq ($(USE_CLANG),)

  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

else

  CFLAGS += -fvisibility=hidden

endif

ifeq ($(USE_CLANG), true)

  # Before Clang 3.1, we had to pass the stack alignment specification directly to llvm with the help of '-mllvm'

  # Starting with version 3.1, Clang understands the '-mstack-alignment' (and rejects '-mllvm -stack-alignment')

  ifneq "$(shell expr \( $(CC_VER_MAJOR) \> 3 \) \| \( \( $(CC_VER_MAJOR) = 3 \) \& \( $(CC_VER_MINOR) \>= 1 \) \))" "0"

    STACK_ALIGNMENT_OPT = -mno-omit-leaf-frame-pointer -mstack-alignment=16

  else

    STACK_ALIGNMENT_OPT = -mno-omit-leaf-frame-pointer -mllvm -stack-alignment=16

  endif

endif

ARCHFLAG = $(ARCHFLAG/$(BUILDARCH))

ARCHFLAG/i486    = -m32 -march=i586

ARCHFLAG/amd64   = -m64 $(STACK_ALIGNMENT_OPT)

ARCHFLAG/ia64    =

ARCHFLAG/sparc   = -m32 -mcpu=v9

ARCHFLAG/sparcv9 = -m64 -mcpu=v9

ARCHFLAG/arm     =  -fsigned-char

ARCHFLAG/zero    = $(ZERO_ARCHFLAG)

ifndef E500V2

ARCHFLAG/ppc     =  -mcpu=powerpc

endif

ARCHFLAG/ppc64   =  -m64

CFLAGS     += $(ARCHFLAG)

AOUT_FLAGS += $(ARCHFLAG)

LFLAGS     += $(ARCHFLAG)

ASFLAGS    += $(ARCHFLAG)

ifdef E500V2

CFLAGS += -DE500V2

endif

# 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

ifeq ($(USE_CLANG), true)

  # However we need to clean the code up before we can unrestrictedly enable this option with Clang

  WARNINGS_ARE_ERRORS += -Wno-logical-op-parentheses -Wno-parentheses-equality -Wno-parentheses

  WARNINGS_ARE_ERRORS += -Wno-switch -Wno-tautological-constant-out-of-range-compare -Wno-tautological-compare

  WARNINGS_ARE_ERRORS += -Wno-delete-non-virtual-dtor -Wno-deprecated -Wno-format -Wno-dynamic-class-memaccess

  WARNINGS_ARE_ERRORS += -Wno-return-type -Wno-empty-body

endif

WARNING_FLAGS = -Wpointer-arith -Wsign-compare -Wundef -Wunused-function -Wunused-value -Wformat=2

ifeq ($(USE_CLANG),)

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

  # conversions which might affect the values. Only enable it in earlier versions.

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

    WARNING_FLAGS += -Wconversion

  endif

endif

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

# Special cases

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

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

OPT_CFLAGS/SIZE=-Os

OPT_CFLAGS/SPEED=-O3

# Hotspot uses very unstrict aliasing turn this optimization off

# This option is added to CFLAGS rather than OPT_CFLAGS

# so that OPT_CFLAGS overrides get this option too.

CFLAGS += -fno-strict-aliasing 

OPT_CFLAGS_DEFAULT ?= SPEED

ifdef OPT_CFLAGS

  ifneq ("$(origin OPT_CFLAGS)", "command line")

    $(error " Use OPT_EXTRAS instead of OPT_CFLAGS to add extra flags to OPT_CFLAGS.")

  endif

endif

OPT_CFLAGS = $(OPT_CFLAGS/$(OPT_CFLAGS_DEFAULT)) $(OPT_EXTRAS)

# 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

# Work around some compiler bugs.

ifeq ($(USE_CLANG), true)

  ifeq ($(shell expr $(CC_VER_MAJOR) = 4 \& $(CC_VER_MINOR) = 2), 1)

    OPT_CFLAGS/loopTransform.o += $(OPT_CFLAGS/NOOPT)

  endif

else

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

  ifeq ($(shell expr $(CC_VER_MAJOR) = 4 \& $(CC_VER_MINOR) = 3), 1)

    OPT_CFLAGS/mulnode.o += $(OPT_CFLAGS/NOOPT)

  endif

endif

# Flags for generating make dependency flags.

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

ifeq ($(USE_CLANG),)

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

    DEPFLAGS += -fpch-deps

  endif

endif

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

# Linker flags

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

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

ifeq ($(USE_CLANG),)

  # 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

endif

# Enable linker optimization

LFLAGS += -Xlinker -O1

ifeq ($(USE_CLANG),)

  # 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

else

  # Don't know how to find out the 'hash style' of a system as '-dumpspecs'

  # doesn't work for Clang. So for now we'll alwys use --hash-style=both

  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 += -Xlinker -export-dynamic

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

# Debug flags

ifeq ($(USE_CLANG), true)

  # Restrict the debug information created by Clang to avoid

  # too big object files and speed the build up a little bit

  # (see http://llvm.org/bugs/show_bug.cgi?id=7554)

  CFLAGS += -flimit-debug-info

endif

# DEBUG_BINARIES uses full -g debug information for all configs

ifeq ($(DEBUG_BINARIES), true)

  CFLAGS += -g

else

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

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

    DEBUG_CFLAGS += -g

  endif

  ifeq ($(ENABLE_FULL_DEBUG_SYMBOLS),1)

    FASTDEBUG_CFLAGS += $(FASTDEBUG_CFLAGS/$(BUILDARCH))

    ifeq ($(FASTDEBUG_CFLAGS/$(BUILDARCH)),)

      FASTDEBUG_CFLAGS += -g

    endif

    OPT_CFLAGS += $(OPT_CFLAGS/$(BUILDARCH))

    ifeq ($(OPT_CFLAGS/$(BUILDARCH)),)

      OPT_CFLAGS += -g

    endif

  endif

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

# Stack walking in the JVM relies on frame pointer (%rbp) to walk thread stack.

# Explicitly specify -fno-omit-frame-pointer because it is off by default

# starting with gcc 4.6.

ifndef USE_SUNCC

  CFLAGS += -fno-omit-frame-pointer

endif