#

# 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.

#

#

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

    ifeq ($(USE_CLANG), true)

      CXX = clang++

      CC  = clang

    endif

    HOSTCXX = $(CXX)

    HOSTCC  = $(CC)

  endif

  AS  = $(CC) -c

endif

ifeq ($(OS_VENDOR), Darwin)

  ifeq ($(DSYMUTIL),)

    DSYMUTIL=dsymutil

  endif

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)

    # The following files are compiled at various optimization

    # levels due to optimization issues encountered at the

    # 'OPT_CFLAGS_DEFAULT' level. The Clang compiler issues a compile

    # time error if there is an optimization level specification

    # skew between the PCH file and the C++ file.  Especially if the

    # PCH file is compiled at a higher optimization level than

    # the C++ file.  One solution might be to prepare extra optimization

    # level specific PCH files for the opt build and use them here, but

    # it's probably not worth the effort as long as only a few 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)

    PCH_FLAG/unsafe.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

ifeq ($(USE_CLANG),)

  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

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/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

# 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

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-compare

# Not yet supported by clang in Xcode 4.6.2

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

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

  WARNINGS_ARE_ERRORS += -Wno-empty-body

endif

WARNING_FLAGS = -Wpointer-arith -Wsign-compare -Wundef -Wunused-function -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"

    WARNINGS_FLAGS += -Wconversion

  endif

endif

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

# 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

# optimization control flags (Used by fastdebug and release variants)

OPT_CFLAGS/NOOPT=-O0

OPT_CFLAGS/DEBUG=-O0

OPT_CFLAGS/SIZE=-Os

OPT_CFLAGS/SPEED=-O3

ifeq ($(OS_VENDOR), Darwin)

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

  # <https://wiki.openjdk.java.net/display/MacOSXPort/Compiler+Errata>

  OPT_CFLAGS_DEFAULT ?= SIZE

else

  OPT_CFLAGS_DEFAULT ?= SPEED

endif

# 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

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

# Work around some compiler bugs.

ifeq ($(USE_CLANG), true)

  # Clang 4.2

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

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

    OPT_CFLAGS/unsafe.o += -O1

  # Clang 5.0

  else ifeq ($(shell expr $(CC_VER_MAJOR) = 5 \& $(CC_VER_MINOR) = 0), 1)

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

    OPT_CFLAGS/unsafe.o += -O1

  # Clang 5.1

  else ifeq ($(shell expr $(CC_VER_MAJOR) = 5 \& $(CC_VER_MINOR) = 1), 1)

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

    OPT_CFLAGS/unsafe.o += -O1

  # Clang 6.0 

  else ifeq ($(shell expr $(CC_VER_MAJOR) = 6 \& $(CC_VER_MINOR) = 0), 1) 

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

    OPT_CFLAGS/unsafe.o += -O1 

  else

    $(error "Update compiler workarounds for Clang $(CC_VER_MAJOR).$(CC_VER_MINOR)")

  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

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

ifeq ($(USE_PRECOMPILED_HEADER),0)

CFLAGS += -DDONT_USE_PRECOMPILED_HEADER

endif

ifeq ($(OS_VENDOR), Darwin)

  # Setting these parameters makes it an error to link to macosx APIs that are

  # newer than the given OS version and makes the linked binaries compatible even

  # if built on a newer version of the OS.

  # The expected format is X.Y.Z

  ifeq ($(MACOSX_VERSION_MIN),)

    MACOSX_VERSION_MIN=10.7.0

  endif

  # The macro takes the version with no dots, ex: 1070

  CFLAGS += -DMAC_OS_X_VERSION_MAX_ALLOWED=$(subst .,,$(MACOSX_VERSION_MIN)) \

            -mmacosx-version-min=$(MACOSX_VERSION_MIN)

  LDFLAGS += -mmacosx-version-min=$(MACOSX_VERSION_MIN)

endif

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

# Assembler flags

# Enforce prerpocessing of .s files

ASFLAGS += -x assembler-with-cpp

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

# Linker flags

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

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

# Ensure use libstdc++ on clang, not libc++

ifeq ($(USE_CLANG), true)

  LFLAGS += -stdlib=libstdc++

endif

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

  ifneq ($(OS_VENDOR), Darwin)

    ifneq (, findstring(debug,$(BUILD_FLAVOR)))

      # for relocations read-only

      LFLAGS += -Xlinker -z -Xlinker relro

      ifeq ($(BUILD_FLAVOR), debug)

        # disable incremental relocations linking

        LFLAGS += -Xlinker -z -Xlinker now

      endif

    endif

  endif

  ifeq ($(BUILDARCH), ia64)

    LFLAGS += -Wl,-relax

  endif

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 +=

  # The apple linker has its own variant of mapfiles/version-scripts

  MAPFLAG = -Xlinker -exported_symbols_list -Xlinker FILENAME

  # 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

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

# Allow no optimizations.

DEBUG_CFLAGS=-O0

# DEBUG_BINARIES uses full -g debug information for all configs

ifeq ($(DEBUG_BINARIES), true)

  CFLAGS += -g

else

  # 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.so is only about 16M.

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

  # (warning: that could easily inflate libjvm.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)),)

      ifeq ($(USE_CLANG), true)

        # Clang doesn't understand -gstabs

        DEBUG_CFLAGS += -g

      else

        DEBUG_CFLAGS += -gstabs

      endif

  endif

  ifeq ($(ENABLE_FULL_DEBUG_SYMBOLS),1)

    FASTDEBUG_CFLAGS/ia64  = -g

    FASTDEBUG_CFLAGS/amd64 = -g

    FASTDEBUG_CFLAGS/arm   = -g

    FASTDEBUG_CFLAGS/ppc   = -g

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

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

      ifeq ($(USE_CLANG), true)

        # Clang doesn't understand -gstabs

        FASTDEBUG_CFLAGS += -g

      else

        FASTDEBUG_CFLAGS += -gstabs

      endif

    endif

    OPT_CFLAGS/ia64  = -g