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1 #
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2 # Copyright (c) 1999, 2011, Oracle and/or its affiliates. All rights reserved.
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3 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 #
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5 # This code is free software; you can redistribute it and/or modify it
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6 # under the terms of the GNU General Public License version 2 only, as
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7 # published by the Free Software Foundation.
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8 #
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9 # This code is distributed in the hope that it will be useful, but WITHOUT
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10 # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 # FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 # version 2 for more details (a copy is included in the LICENSE file that
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13 # accompanied this code).
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14 #
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15 # You should have received a copy of the GNU General Public License version
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16 # 2 along with this work; if not, write to the Free Software Foundation,
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17 # Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 #
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19 # Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 # or visit www.oracle.com if you need additional information or have any
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21 # questions.
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22 #
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23 #
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24
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25 OS_VENDOR = $(shell uname -s)
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26
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27 #------------------------------------------------------------------------
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28 # CC, CPP & AS
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29
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30 # When cross-compiling the ALT_COMPILER_PATH points
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31 # to the cross-compilation toolset
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32 ifdef CROSS_COMPILE_ARCH
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33 CPP = $(ALT_COMPILER_PATH)/g++
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34 CC = $(ALT_COMPILER_PATH)/gcc
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35 HOSTCPP = g++
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36 HOSTCC = gcc
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37 else ifneq ($(OS_VENDOR), Darwin)
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38 CXX = g++
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39 CPP = $(CXX)
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40 CC = gcc
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41 HOSTCPP = $(CPP)
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42 HOSTCC = $(CC)
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43 endif
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44
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45 # i486 hotspot requires -mstackrealign on Darwin.
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46 # llvm-gcc supports this in Xcode 3.2.6 and 4.0.
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47 # gcc-4.0 supports this on earlier versions.
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48 # Prefer llvm-gcc where available.
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49 ifeq ($(OS_VENDOR), Darwin)
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50 ifeq ($(origin CXX), default)
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51 CXX = llvm-g++
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52 endif
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53 ifeq ($(origin CC), default)
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54 CC = llvm-gcc
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55 endif
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56 CPP = $(CXX)
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57
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58 ifeq ($(ARCH), i486)
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59 LLVM_SUPPORTS_STACKREALIGN := $(shell \
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60 [ "0"`llvm-gcc -v 2>&1 | grep LLVM | sed -E "s/.*LLVM build ([0-9]+).*/\1/"` -gt "2333" ] \
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61 && echo true || echo false)
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62
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63 ifeq ($(LLVM_SUPPORTS_STACKREALIGN), true)
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64 CXX32 ?= llvm-g++
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65 CC32 ?= llvm-gcc
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66 else
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67 CXX32 ?= g++-4.0
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68 CC32 ?= gcc-4.0
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69 endif
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70 CPP = $(CXX32)
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71 CC = $(CC32)
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72 endif
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73
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74 HOSTCPP = $(CPP)
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75 HOSTCC = $(CC)
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76 endif
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77
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78 AS = $(CC) -c -x assembler-with-cpp
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79
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80 # -dumpversion in gcc-2.91 shows "egcs-2.91.66". In later version, it only
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81 # prints the numbers (e.g. "2.95", "3.2.1")
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82 CC_VER_MAJOR := $(shell $(CC) -dumpversion | sed 's/egcs-//' | cut -d'.' -f1)
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83 CC_VER_MINOR := $(shell $(CC) -dumpversion | sed 's/egcs-//' | cut -d'.' -f2)
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84
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85 # check for precompiled headers support
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86 ifneq "$(shell expr \( $(CC_VER_MAJOR) \> 3 \) \| \( \( $(CC_VER_MAJOR) = 3 \) \& \( $(CC_VER_MINOR) \>= 4 \) \))" "0"
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87 # Allow the user to turn off precompiled headers from the command line.
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88 ifneq ($(USE_PRECOMPILED_HEADER),0)
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89 USE_PRECOMPILED_HEADER=1
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90 PRECOMPILED_HEADER_DIR=.
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91 PRECOMPILED_HEADER_SRC=$(GAMMADIR)/src/share/vm/precompiled.hpp
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92 PRECOMPILED_HEADER=$(PRECOMPILED_HEADER_DIR)/precompiled.hpp.gch
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93 endif
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94 endif
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95
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96
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97 #------------------------------------------------------------------------
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98 # Compiler flags
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99
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100 # position-independent code
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101 PICFLAG = -fPIC
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102
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103 VM_PICFLAG/LIBJVM = $(PICFLAG)
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104 VM_PICFLAG/AOUT =
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105 VM_PICFLAG = $(VM_PICFLAG/$(LINK_INTO))
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106
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107 ifeq ($(ZERO_BUILD), true)
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108 CFLAGS += $(LIBFFI_CFLAGS)
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109 endif
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110 ifeq ($(SHARK_BUILD), true)
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111 CFLAGS += $(LLVM_CFLAGS)
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112 endif
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113 CFLAGS += $(VM_PICFLAG)
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114 CFLAGS += -fno-rtti
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115 CFLAGS += -fno-exceptions
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116 CFLAGS += -pthread
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117 CFLAGS += -fcheck-new
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118 # version 4 and above support fvisibility=hidden (matches jni_x86.h file)
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119 # except 4.1.2 gives pointless warnings that can't be disabled (afaik)
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120 ifneq "$(shell expr \( $(CC_VER_MAJOR) \> 4 \) \| \( \( $(CC_VER_MAJOR) = 4 \) \& \( $(CC_VER_MINOR) \>= 3 \) \))" "0"
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121 CFLAGS += -fvisibility=hidden
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122 endif
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123
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124 ARCHFLAG = $(ARCHFLAG/$(BUILDARCH))
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125 ARCHFLAG/i486 = -m32 -march=i586
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126 ARCHFLAG/amd64 = -m64
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127 ARCHFLAG/ia64 =
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128 ARCHFLAG/sparc = -m32 -mcpu=v9
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129 ARCHFLAG/sparcv9 = -m64 -mcpu=v9
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130 ARCHFLAG/zero = $(ZERO_ARCHFLAG)
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131
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132 # Darwin-specific build flags
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133 ifeq ($(OS_VENDOR), Darwin)
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134 # Ineffecient 16-byte stack re-alignment on Darwin/IA32
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135 ARCHFLAG/i486 += -mstackrealign
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136 endif
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137
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138 CFLAGS += $(ARCHFLAG)
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139 AOUT_FLAGS += $(ARCHFLAG)
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140 LFLAGS += $(ARCHFLAG)
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141 ASFLAGS += $(ARCHFLAG)
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142
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143 ifdef E500V2
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144 CFLAGS += -DE500V2
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145 endif
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146
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147 # Use C++ Interpreter
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148 ifdef CC_INTERP
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149 CFLAGS += -DCC_INTERP
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150 endif
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151
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152 # Build for embedded targets
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153 ifdef JAVASE_EMBEDDED
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154 CFLAGS += -DJAVASE_EMBEDDED
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155 endif
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156
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157 # Keep temporary files (.ii, .s)
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158 ifdef NEED_ASM
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159 CFLAGS += -save-temps
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160 else
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161 CFLAGS += -pipe
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162 endif
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163
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164 # Compiler warnings are treated as errors
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165 ifneq ($(COMPILER_WARNINGS_FATAL),false)
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166 WARNINGS_ARE_ERRORS = -Werror
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167 endif
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168
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169 # Except for a few acceptable ones
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170 # Since GCC 4.3, -Wconversion has changed its meanings to warn these implicit
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171 # conversions which might affect the values. To avoid that, we need to turn
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172 # it off explicitly.
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173 ifneq "$(shell expr \( $(CC_VER_MAJOR) \> 4 \) \| \( \( $(CC_VER_MAJOR) = 4 \) \& \( $(CC_VER_MINOR) \>= 3 \) \))" "0"
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174 ACCEPTABLE_WARNINGS = -Wpointer-arith -Wsign-compare
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175 else
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176 ACCEPTABLE_WARNINGS = -Wpointer-arith -Wconversion -Wsign-compare
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177 endif
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178
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179 CFLAGS_WARN/DEFAULT = $(WARNINGS_ARE_ERRORS) $(ACCEPTABLE_WARNINGS)
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180 # Special cases
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181 CFLAGS_WARN/BYFILE = $(CFLAGS_WARN/$@)$(CFLAGS_WARN/DEFAULT$(CFLAGS_WARN/$@))
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182 # XXXDARWIN: for _dyld_bind_fully_image_containing_address
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183 ifeq ($(OS_VENDOR), Darwin)
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184 CFLAGS_WARN/os_bsd.o = $(CFLAGS_WARN/DEFAULT) -Wno-deprecated-declarations
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185 endif
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186
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187
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188 # The flags to use for an Optimized g++ build
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189 ifeq ($(OS_VENDOR), Darwin)
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190 # use -Os by default, unless -O3 can be proved to be worth the cost, as per policy
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191 # <http://wikis.sun.com/display/OpenJDK/Mac+OS+X+Port+Compilers>
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192 OPT_CFLAGS += -Os
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193 else
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194 OPT_CFLAGS += -O3
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195 endif
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196
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197 # Hotspot uses very unstrict aliasing turn this optimization off
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198 OPT_CFLAGS += -fno-strict-aliasing
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199
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200 # The gcc compiler segv's on ia64 when compiling bytecodeInterpreter.cpp
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201 # if we use expensive-optimizations
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202 ifeq ($(BUILDARCH), ia64)
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203 OPT_CFLAGS += -fno-expensive-optimizations
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204 endif
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205
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206 OPT_CFLAGS/NOOPT=-O0
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207
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208 # 6835796. Problem in GCC 4.3.0 with mulnode.o optimized compilation.
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209 ifneq "$(shell expr \( \( $(CC_VER_MAJOR) = 4 \) \& \( $(CC_VER_MINOR) = 3 \) \))" "0"
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210 OPT_CFLAGS/mulnode.o += -O0
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211 endif
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212
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213 # Flags for generating make dependency flags.
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214 ifneq ("${CC_VER_MAJOR}", "2")
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215 DEPFLAGS = -MMD -MP -MF $(DEP_DIR)/$(@:%=%.d)
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216 endif
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217
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218 # -DDONT_USE_PRECOMPILED_HEADER will exclude all includes in precompiled.hpp.
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219 ifneq ($(USE_PRECOMPILED_HEADER),1)
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220 CFLAGS += -DDONT_USE_PRECOMPILED_HEADER
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221 endif
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222
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223 #------------------------------------------------------------------------
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224 # Linker flags
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225
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226 # statically link libstdc++.so, work with gcc but ignored by g++
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227 STATIC_STDCXX = -Wl,-Bstatic -lstdc++ -Wl,-Bdynamic
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228
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229 # statically link libgcc and/or libgcc_s, libgcc does not exist before gcc-3.x.
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230 ifneq ("${CC_VER_MAJOR}", "2")
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231 STATIC_LIBGCC += -static-libgcc
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232 endif
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233
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234 ifeq ($(BUILDARCH), ia64)
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235 LFLAGS += -Wl,-relax
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236 endif
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237
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238 # Use $(MAPFLAG:FILENAME=real_file_name) to specify a map file.
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239 MAPFLAG = -Xlinker --version-script=FILENAME
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240
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241 #
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242 # Shared Library
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243 #
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244 ifeq ($(OS_VENDOR), Darwin)
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245 # Standard linker flags
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246 LFLAGS +=
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247
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248 # Darwin doesn't use ELF and doesn't support version scripts
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249 LDNOMAP = true
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250
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251 # Use $(SONAMEFLAG:SONAME=soname) to specify the intrinsic name of a shared obj
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252 SONAMEFLAG =
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253
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254 # Build shared library
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255 SHARED_FLAG = -Wl,-install_name,@rpath/$(@F) -dynamiclib -compatibility_version 1.0.0 -current_version 1.0.0 $(VM_PICFLAG)
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256
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257 # Keep symbols even they are not used
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258 #AOUT_FLAGS += -Xlinker -export-dynamic
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259 else
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260 # Enable linker optimization
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261 LFLAGS += -Xlinker -O1
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262
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263 # Use $(SONAMEFLAG:SONAME=soname) to specify the intrinsic name of a shared obj
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264 SONAMEFLAG = -Xlinker -soname=SONAME
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265
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266 # Build shared library
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267 SHARED_FLAG = -shared $(VM_PICFLAG)
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268
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269 # Keep symbols even they are not used
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270 AOUT_FLAGS += -Xlinker -export-dynamic
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271 endif
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272
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273 #------------------------------------------------------------------------
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274 # Debug flags
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275
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276 # Use the stabs format for debugging information (this is the default
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277 # on gcc-2.91). It's good enough, has all the information about line
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278 # numbers and local variables, and libjvm_g.so is only about 16M.
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279 # Change this back to "-g" if you want the most expressive format.
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280 # (warning: that could easily inflate libjvm_g.so to 150M!)
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281 # Note: The Itanium gcc compiler crashes when using -gstabs.
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282 DEBUG_CFLAGS/ia64 = -g
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283 DEBUG_CFLAGS/amd64 = -g
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284 DEBUG_CFLAGS/arm = -g
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285 DEBUG_CFLAGS/ppc = -g
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286 DEBUG_CFLAGS += $(DEBUG_CFLAGS/$(BUILDARCH))
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287 ifeq ($(DEBUG_CFLAGS/$(BUILDARCH)),)
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288 DEBUG_CFLAGS += -gstabs
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289 endif
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290
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291 # DEBUG_BINARIES overrides everything, use full -g debug information
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292 ifeq ($(DEBUG_BINARIES), true)
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293 DEBUG_CFLAGS = -g
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294 CFLAGS += $(DEBUG_CFLAGS)
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295 endif
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296
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297 # If we are building HEADLESS, pass on to VM
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298 # so it can set the java.awt.headless property
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299 ifdef HEADLESS
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300 CFLAGS += -DHEADLESS
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301 endif
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302
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303 # We are building Embedded for a small device
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304 # favor code space over speed
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305 ifdef MINIMIZE_RAM_USAGE
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306 CFLAGS += -DMINIMIZE_RAM_USAGE
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307 endif
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