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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 CXX = $(ALT_COMPILER_PATH)/g++
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34 CPP = $(ALT_COMPILER_PATH)/g++
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35 CC = $(ALT_COMPILER_PATH)/gcc
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36 HOSTCPP = g++
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37 HOSTCC = gcc
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38 else
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39 CXX ?= g++
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40 CPP = $(CXX)
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41 CC ?= gcc
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42 HOSTCPP = $(CPP)
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43 HOSTCC = $(CPP)
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44 endif
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45
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46 AS = $(CC) -c -x assembler-with-cpp
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47
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48 # -dumpversion in gcc-2.91 shows "egcs-2.91.66". In later version, it only
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49 # prints the numbers (e.g. "2.95", "3.2.1")
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50 CC_VER_MAJOR := $(shell $(CC) -dumpversion | sed 's/egcs-//' | cut -d'.' -f1)
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51 CC_VER_MINOR := $(shell $(CC) -dumpversion | sed 's/egcs-//' | cut -d'.' -f2)
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52
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53 # check for precompiled headers support
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54 ifneq "$(shell expr \( $(CC_VER_MAJOR) \> 3 \) \| \( \( $(CC_VER_MAJOR) = 3 \) \& \( $(CC_VER_MINOR) \>= 4 \) \))" "0"
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55 # Allow the user to turn off precompiled headers from the command line.
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56 ifneq ($(USE_PRECOMPILED_HEADER),0)
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57 USE_PRECOMPILED_HEADER=1
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58 PRECOMPILED_HEADER_DIR=.
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59 PRECOMPILED_HEADER_SRC=$(GAMMADIR)/src/share/vm/precompiled.hpp
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60 PRECOMPILED_HEADER=$(PRECOMPILED_HEADER_DIR)/precompiled.hpp.gch
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61 endif
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62 endif
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63
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64
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65 #------------------------------------------------------------------------
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66 # Compiler flags
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67
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68 # position-independent code
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69 PICFLAG = -fPIC
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70
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71 VM_PICFLAG/LIBJVM = $(PICFLAG)
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72 VM_PICFLAG/AOUT =
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73 VM_PICFLAG = $(VM_PICFLAG/$(LINK_INTO))
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74
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75 ifeq ($(ZERO_BUILD), true)
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76 CFLAGS += $(LIBFFI_CFLAGS)
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77 endif
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78 ifeq ($(SHARK_BUILD), true)
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79 CFLAGS += $(LLVM_CFLAGS)
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80 endif
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81 CFLAGS += $(VM_PICFLAG)
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82 CFLAGS += -fno-rtti
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83 CFLAGS += -fno-exceptions
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84 CFLAGS += -pthread
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85 CFLAGS += -fcheck-new
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86 # version 4 and above support fvisibility=hidden (matches jni_x86.h file)
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87 # except 4.1.2 gives pointless warnings that can't be disabled (afaik)
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88 ifneq "$(shell expr \( $(CC_VER_MAJOR) \> 4 \) \| \( \( $(CC_VER_MAJOR) = 4 \) \& \( $(CC_VER_MINOR) \>= 3 \) \))" "0"
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89 CFLAGS += -fvisibility=hidden
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90 endif
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91
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92 ARCHFLAG = $(ARCHFLAG/$(BUILDARCH))
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93 ARCHFLAG/i486 = -m32 -march=i586
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94 ARCHFLAG/amd64 = -m64
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95 ARCHFLAG/ia64 =
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96 ARCHFLAG/sparc = -m32 -mcpu=v9
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97 ARCHFLAG/sparcv9 = -m64 -mcpu=v9
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98 ARCHFLAG/zero = $(ZERO_ARCHFLAG)
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99
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100 # Darwin-specific build flags
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101 ifeq ($(OS_VENDOR), Darwin)
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102 # Ineffecient 16-byte stack re-alignment on Darwin/IA32
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103 ARCHFLAG/i486 += -mstackrealign
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104 endif
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105
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106 CFLAGS += $(ARCHFLAG)
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107 AOUT_FLAGS += $(ARCHFLAG)
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108 LFLAGS += $(ARCHFLAG)
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109 ASFLAGS += $(ARCHFLAG)
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110
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111 ifdef E500V2
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112 CFLAGS += -DE500V2
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113 endif
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114
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115 # Use C++ Interpreter
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116 ifdef CC_INTERP
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117 CFLAGS += -DCC_INTERP
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118 endif
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119
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120 # Build for embedded targets
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121 ifdef JAVASE_EMBEDDED
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122 CFLAGS += -DJAVASE_EMBEDDED
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123 endif
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124
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125 # Keep temporary files (.ii, .s)
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126 ifdef NEED_ASM
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127 CFLAGS += -save-temps
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128 else
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129 CFLAGS += -pipe
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130 endif
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131
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132 # Compiler warnings are treated as errors
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133 WARNINGS_ARE_ERRORS = -Werror
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134
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135 # Except for a few acceptable ones
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136 # Since GCC 4.3, -Wconversion has changed its meanings to warn these implicit
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137 # conversions which might affect the values. To avoid that, we need to turn
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138 # it off explicitly.
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139 ifneq "$(shell expr \( $(CC_VER_MAJOR) \> 4 \) \| \( \( $(CC_VER_MAJOR) = 4 \) \& \( $(CC_VER_MINOR) \>= 3 \) \))" "0"
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140 ACCEPTABLE_WARNINGS = -Wpointer-arith -Wsign-compare
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141 else
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142 ACCEPTABLE_WARNINGS = -Wpointer-arith -Wconversion -Wsign-compare
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143 endif
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144
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145 CFLAGS_WARN/DEFAULT = $(WARNINGS_ARE_ERRORS) $(ACCEPTABLE_WARNINGS)
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146 # Special cases
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147 CFLAGS_WARN/BYFILE = $(CFLAGS_WARN/$@)$(CFLAGS_WARN/DEFAULT$(CFLAGS_WARN/$@))
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148 # XXXDARWIN: for _dyld_bind_fully_image_containing_address
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149 ifeq ($(OS_VENDOR), Darwin)
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150 CFLAGS_WARN/os_bsd.o = $(CFLAGS_WARN/DEFAULT) -Wno-deprecated-declarations
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151 endif
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152
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153
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154 # The flags to use for an Optimized g++ build
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155 OPT_CFLAGS += -O3
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156
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157 # Hotspot uses very unstrict aliasing turn this optimization off
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158 OPT_CFLAGS += -fno-strict-aliasing
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159
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160 # The gcc compiler segv's on ia64 when compiling bytecodeInterpreter.cpp
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161 # if we use expensive-optimizations
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162 ifeq ($(BUILDARCH), ia64)
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163 OPT_CFLAGS += -fno-expensive-optimizations
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164 endif
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165
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166 OPT_CFLAGS/NOOPT=-O0
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167
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168 # 6835796. Problem in GCC 4.3.0 with mulnode.o optimized compilation.
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169 ifneq "$(shell expr \( \( $(CC_VER_MAJOR) = 4 \) \& \( $(CC_VER_MINOR) = 3 \) \))" "0"
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170 OPT_CFLAGS/mulnode.o += -O0
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171 endif
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172
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173 # Flags for generating make dependency flags.
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174 ifneq ("${CC_VER_MAJOR}", "2")
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175 DEPFLAGS = -MMD -MP -MF $(DEP_DIR)/$(@:%=%.d)
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176 endif
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177
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178 # -DDONT_USE_PRECOMPILED_HEADER will exclude all includes in precompiled.hpp.
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179 ifneq ($(USE_PRECOMPILED_HEADER),1)
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180 CFLAGS += -DDONT_USE_PRECOMPILED_HEADER
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181 endif
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182
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183 #------------------------------------------------------------------------
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184 # Linker flags
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185
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186 # statically link libstdc++.so, work with gcc but ignored by g++
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187 STATIC_STDCXX = -Wl,-Bstatic -lstdc++ -Wl,-Bdynamic
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188
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189 # statically link libgcc and/or libgcc_s, libgcc does not exist before gcc-3.x.
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190 ifneq ("${CC_VER_MAJOR}", "2")
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191 STATIC_LIBGCC += -static-libgcc
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192 endif
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193
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194 ifeq ($(BUILDARCH), ia64)
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195 LFLAGS += -Wl,-relax
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196 endif
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197
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198 # Use $(MAPFLAG:FILENAME=real_file_name) to specify a map file.
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199 MAPFLAG = -Xlinker --version-script=FILENAME
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200
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201 #
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202 # Shared Library
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203 #
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204 ifeq ($(OS_VENDOR), Darwin)
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205 # Standard linker flags
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206 LFLAGS +=
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207
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208 # Darwin doesn't use ELF and doesn't support version scripts
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209 LDNOMAP = true
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210
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211 # Use $(SONAMEFLAG:SONAME=soname) to specify the intrinsic name of a shared obj
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212 SONAMEFLAG =
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213
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214 # Build shared library
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215 SHARED_FLAG = -dynamiclib $(VM_PICFLAG)
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216
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217 # Keep symbols even they are not used
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218 #AOUT_FLAGS += -Xlinker -export-dynamic
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219 else
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220 # Enable linker optimization
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221 LFLAGS += -Xlinker -O1
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222
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223 # Use $(SONAMEFLAG:SONAME=soname) to specify the intrinsic name of a shared obj
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224 SONAMEFLAG = -Xlinker -soname=SONAME
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225
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226 # Build shared library
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227 SHARED_FLAG = -shared $(VM_PICFLAG)
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228
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229 # Keep symbols even they are not used
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230 AOUT_FLAGS += -Xlinker -export-dynamic
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231 endif
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232
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233 #------------------------------------------------------------------------
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234 # Debug flags
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235
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236 # Use the stabs format for debugging information (this is the default
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237 # on gcc-2.91). It's good enough, has all the information about line
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238 # numbers and local variables, and libjvm_g.so is only about 16M.
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239 # Change this back to "-g" if you want the most expressive format.
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240 # (warning: that could easily inflate libjvm_g.so to 150M!)
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241 # Note: The Itanium gcc compiler crashes when using -gstabs.
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242 DEBUG_CFLAGS/ia64 = -g
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243 DEBUG_CFLAGS/amd64 = -g
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244 DEBUG_CFLAGS/arm = -g
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245 DEBUG_CFLAGS/ppc = -g
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246 DEBUG_CFLAGS += $(DEBUG_CFLAGS/$(BUILDARCH))
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247 ifeq ($(DEBUG_CFLAGS/$(BUILDARCH)),)
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248 DEBUG_CFLAGS += -gstabs
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249 endif
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250
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251 # DEBUG_BINARIES overrides everything, use full -g debug information
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252 ifeq ($(DEBUG_BINARIES), true)
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253 DEBUG_CFLAGS = -g
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254 CFLAGS += $(DEBUG_CFLAGS)
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255 endif
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256
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257 # If we are building HEADLESS, pass on to VM
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258 # so it can set the java.awt.headless property
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259 ifdef HEADLESS
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260 CFLAGS += -DHEADLESS
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261 endif
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262
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263 # We are building Embedded for a small device
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264 # favor code space over speed
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265 ifdef MINIMIZE_RAM_USAGE
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266 CFLAGS += -DMINIMIZE_RAM_USAGE
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267 endif
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