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, CXX & AS
  27 
  28 # When cross-compiling the ALT_COMPILER_PATH points
  29 # to the cross-compilation toolset
  30 ifdef CROSS_COMPILE_ARCH
  31 CXX = $(ALT_COMPILER_PATH)/g++
  32 CC  = $(ALT_COMPILER_PATH)/gcc
  33 HOSTCXX = g++
  34 HOSTCC  = gcc
  35 else
  36 CXX = g++
  37 CC  = gcc
  38 HOSTCXX = $(CXX)
  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 ($(USE_PRECOMPILED_HEADER),0)
  53 PRECOMPILED_HEADER_DIR=.
  54 PRECOMPILED_HEADER_SRC=$(GAMMADIR)/src/share/vm/precompiled/precompiled.hpp
  55 PRECOMPILED_HEADER=$(PRECOMPILED_HEADER_DIR)/precompiled.hpp.gch
  56 endif
  57 endif
  58 
  59 
  60 #------------------------------------------------------------------------
  61 # Compiler flags
  62 
  63 # position-independent code
  64 PICFLAG = -fPIC
  65 
  66 VM_PICFLAG/LIBJVM = $(PICFLAG)
  67 VM_PICFLAG/AOUT   =
  68 VM_PICFLAG        = $(VM_PICFLAG/$(LINK_INTO))
  69 
  70 ifeq ($(ZERO_BUILD), true)
  71 CFLAGS += $(LIBFFI_CFLAGS)
  72 endif
  73 ifeq ($(SHARK_BUILD), true)
  74 CFLAGS += $(LLVM_CFLAGS)
  75 endif
  76 CFLAGS += $(VM_PICFLAG)
  77 CFLAGS += -fno-rtti
  78 CFLAGS += -fno-exceptions
  79 CFLAGS += -D_REENTRANT
  80 CFLAGS += -fcheck-new
  81 # version 4 and above support fvisibility=hidden (matches jni_x86.h file)
  82 # except 4.1.2 gives pointless warnings that can't be disabled (afaik)
  83 ifneq "$(shell expr \( $(CC_VER_MAJOR) \> 4 \) \| \( \( $(CC_VER_MAJOR) = 4 \) \& \( $(CC_VER_MINOR) \>= 3 \) \))" "0"
  84 CFLAGS += -fvisibility=hidden
  85 endif
  86 
  87 ARCHFLAG = $(ARCHFLAG/$(BUILDARCH))
  88 ARCHFLAG/i486    = -m32 -march=i586
  89 ARCHFLAG/amd64   = -m64
  90 ARCHFLAG/ia64    =
  91 ARCHFLAG/sparc   = -m32 -mcpu=v9
  92 ARCHFLAG/sparcv9 = -m64 -mcpu=v9
  93 ARCHFLAG/arm     =  -fsigned-char
  94 ARCHFLAG/zero    = $(ZERO_ARCHFLAG)
  95 ifndef E500V2
  96 ARCHFLAG/ppc     =  -mcpu=powerpc
  97 endif
  98 
  99 CFLAGS     += $(ARCHFLAG)
 100 AOUT_FLAGS += $(ARCHFLAG)
 101 LFLAGS     += $(ARCHFLAG)
 102 ASFLAGS    += $(ARCHFLAG)
 103 
 104 ifdef E500V2
 105 CFLAGS += -DE500V2
 106 endif
 107 
 108 # Use C++ Interpreter
 109 ifdef CC_INTERP
 110   CFLAGS += -DCC_INTERP
 111 endif
 112 
 113 # Build for embedded targets
 114 ifdef JAVASE_EMBEDDED
 115   CFLAGS += -DJAVASE_EMBEDDED
 116 endif
 117 
 118 # Keep temporary files (.ii, .s)
 119 ifdef NEED_ASM
 120   CFLAGS += -save-temps
 121 else
 122   CFLAGS += -pipe
 123 endif
 124 
 125 # Compiler warnings are treated as errors
 126 WARNINGS_ARE_ERRORS = -Werror
 127 
 128 # Except for a few acceptable ones
 129 # Since GCC 4.3, -Wconversion has changed its meanings to warn these implicit
 130 # conversions which might affect the values. To avoid that, we need to turn
 131 # it off explicitly. 
 132 ifneq "$(shell expr \( $(CC_VER_MAJOR) \> 4 \) \| \( \( $(CC_VER_MAJOR) = 4 \) \& \( $(CC_VER_MINOR) \>= 3 \) \))" "0"
 133 ACCEPTABLE_WARNINGS = -Wpointer-arith -Wsign-compare
 134 else
 135 ACCEPTABLE_WARNINGS = -Wpointer-arith -Wconversion -Wsign-compare
 136 endif
 137 
 138 CFLAGS_WARN/DEFAULT = $(WARNINGS_ARE_ERRORS) $(ACCEPTABLE_WARNINGS)
 139 # Special cases
 140 CFLAGS_WARN/BYFILE = $(CFLAGS_WARN/$@)$(CFLAGS_WARN/DEFAULT$(CFLAGS_WARN/$@)) 
 141 
 142 # The flags to use for an Optimized g++ build
 143 OPT_CFLAGS += -O3
 144 
 145 # Hotspot uses very unstrict aliasing turn this optimization off
 146 OPT_CFLAGS += -fno-strict-aliasing
 147 
 148 # The gcc compiler segv's on ia64 when compiling bytecodeInterpreter.cpp 
 149 # if we use expensive-optimizations
 150 ifeq ($(BUILDARCH), ia64)
 151 OPT_CFLAGS += -fno-expensive-optimizations
 152 endif
 153 
 154 OPT_CFLAGS/NOOPT=-O0
 155 
 156 # 6835796. Problem in GCC 4.3.0 with mulnode.o optimized compilation. 
 157 ifneq "$(shell expr \( \( $(CC_VER_MAJOR) = 4 \) \& \( $(CC_VER_MINOR) = 3 \) \))" "0"
 158 OPT_CFLAGS/mulnode.o += -O0
 159 endif
 160 
 161 # Flags for generating make dependency flags.
 162 ifneq ("${CC_VER_MAJOR}", "2")
 163 DEPFLAGS = -MMD -MP -MF $(DEP_DIR)/$(@:%=%.d)
 164 endif
 165 
 166 # -DDONT_USE_PRECOMPILED_HEADER will exclude all includes in precompiled.hpp.
 167 ifeq ($(USE_PRECOMPILED_HEADER),0)
 168 CFLAGS += -DDONT_USE_PRECOMPILED_HEADER
 169 endif
 170 
 171 #------------------------------------------------------------------------
 172 # Linker flags
 173 
 174 # statically link libstdc++.so, work with gcc but ignored by g++
 175 STATIC_STDCXX = -Wl,-Bstatic -lstdc++ -Wl,-Bdynamic
 176 
 177 # statically link libgcc and/or libgcc_s, libgcc does not exist before gcc-3.x.
 178 ifneq ("${CC_VER_MAJOR}", "2")
 179 STATIC_LIBGCC += -static-libgcc
 180 endif
 181 
 182 ifeq ($(BUILDARCH), ia64)
 183 LFLAGS += -Wl,-relax
 184 endif
 185 
 186 # Enable linker optimization
 187 LFLAGS += -Xlinker -O1
 188 
 189 # If this is a --hash-style=gnu system, use --hash-style=both
 190 #   The gnu .hash section won't work on some Linux systems like SuSE 10.
 191 _HAS_HASH_STYLE_GNU:=$(shell $(CC) -dumpspecs | grep -- '--hash-style=gnu')
 192 ifneq ($(_HAS_HASH_STYLE_GNU),)
 193   LDFLAGS_HASH_STYLE = -Wl,--hash-style=both
 194 endif
 195 LFLAGS += $(LDFLAGS_HASH_STYLE)
 196 
 197 # Use $(MAPFLAG:FILENAME=real_file_name) to specify a map file.
 198 MAPFLAG = -Xlinker --version-script=FILENAME
 199 
 200 # Use $(SONAMEFLAG:SONAME=soname) to specify the intrinsic name of a shared obj
 201 SONAMEFLAG = -Xlinker -soname=SONAME
 202 
 203 # Build shared library
 204 SHARED_FLAG = -shared
 205 
 206 # Keep symbols even they are not used
 207 AOUT_FLAGS += -Xlinker -export-dynamic
 208 
 209 #------------------------------------------------------------------------
 210 # Debug flags
 211 
 212 # Use the stabs format for debugging information (this is the default
 213 # on gcc-2.91). It's good enough, has all the information about line
 214 # numbers and local variables, and libjvm_g.so is only about 16M.
 215 # Change this back to "-g" if you want the most expressive format.
 216 # (warning: that could easily inflate libjvm_g.so to 150M!)
 217 # Note: The Itanium gcc compiler crashes when using -gstabs.
 218 DEBUG_CFLAGS/ia64  = -g
 219 DEBUG_CFLAGS/amd64 = -g
 220 DEBUG_CFLAGS/arm   = -g
 221 DEBUG_CFLAGS/ppc   = -g
 222 DEBUG_CFLAGS += $(DEBUG_CFLAGS/$(BUILDARCH))
 223 ifeq ($(DEBUG_CFLAGS/$(BUILDARCH)),)
 224 DEBUG_CFLAGS += -gstabs
 225 endif
 226 
 227 ifneq ($(OBJCOPY),)
 228   FASTDEBUG_CFLAGS/ia64  = -g
 229   FASTDEBUG_CFLAGS/amd64 = -g
 230   FASTDEBUG_CFLAGS/arm   = -g
 231   FASTDEBUG_CFLAGS/ppc   = -g
 232   FASTDEBUG_CFLAGS += $(DEBUG_CFLAGS/$(BUILDARCH))
 233   ifeq ($(FASTDEBUG_CFLAGS/$(BUILDARCH)),)
 234     FASTDEBUG_CFLAGS += -gstabs
 235   endif
 236 
 237   OPT_CFLAGS/ia64  = -g
 238   OPT_CFLAGS/amd64 = -g
 239   OPT_CFLAGS/arm   = -g
 240   OPT_CFLAGS/ppc   = -g
 241   OPT_CFLAGS += $(OPT_CFLAGS/$(BUILDARCH))
 242   ifeq ($(OPT_CFLAGS/$(BUILDARCH)),)
 243     OPT_CFLAGS += -gstabs
 244   endif
 245 endif
 246 
 247 # DEBUG_BINARIES overrides everything, use full -g debug information
 248 ifeq ($(DEBUG_BINARIES), true)
 249   DEBUG_CFLAGS = -g
 250   CFLAGS += $(DEBUG_CFLAGS)
 251 endif
 252 
 253 # If we are building HEADLESS, pass on to VM
 254 # so it can set the java.awt.headless property
 255 ifdef HEADLESS
 256 CFLAGS += -DHEADLESS
 257 endif
 258 
 259 # We are building Embedded for a small device
 260 # favor code space over speed
 261 ifdef MINIMIZE_RAM_USAGE
 262 CFLAGS += -DMINIMIZE_RAM_USAGE
 263 endif
 264 
 265 ifdef CROSS_COMPILE_ARCH
 266   STRIP = $(ALT_COMPILER_PATH)/strip
 267 else
 268   STRIP = strip
 269 endif