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