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 OS_VENDOR = $(shell uname -s)
  26 
  27 #------------------------------------------------------------------------
  28 # CC, CXX & AS
  29 
  30 # If a SPEC is not set already, then use these defaults.
  31 ifeq ($(SPEC),)
  32   # When cross-compiling the ALT_COMPILER_PATH points
  33   # to the cross-compilation toolset
  34   ifdef CROSS_COMPILE_ARCH
  35     CXX = $(ALT_COMPILER_PATH)/g++
  36     CC  = $(ALT_COMPILER_PATH)/gcc
  37     HOSTCXX = g++
  38     HOSTCC  = gcc
  39   else ifneq ($(OS_VENDOR), Darwin)
  40     CXX = g++
  41     CC  = gcc
  42     HOSTCXX = $(CXX)
  43     HOSTCC  = $(CC)
  44   endif
  45 
  46   # i486 hotspot requires -mstackrealign on Darwin.
  47   # llvm-gcc supports this in Xcode 3.2.6 and 4.0.
  48   # gcc-4.0 supports this on earlier versions.
  49   # Prefer llvm-gcc where available.
  50   ifeq ($(OS_VENDOR), Darwin)
  51     ifeq ($(origin CXX), default)
  52       CXX = llvm-g++
  53     endif
  54     ifeq ($(origin CC), default)
  55       CC  = llvm-gcc
  56     endif
  57 
  58     ifeq ($(ARCH), i486)
  59       LLVM_SUPPORTS_STACKREALIGN := $(shell \
  60        [ "0"`llvm-gcc -v 2>&1 | grep LLVM | sed -E "s/.*LLVM build ([0-9]+).*/\1/"` -gt "2333" ] \
  61        && echo true || echo false)
  62 
  63       ifeq ($(LLVM_SUPPORTS_STACKREALIGN), true)
  64         CXX32 ?= llvm-g++
  65         CC32  ?= llvm-gcc
  66       else
  67         CXX32 ?= g++-4.0
  68         CC32  ?= gcc-4.0
  69       endif
  70       CXX = $(CXX32)
  71       CC  = $(CC32)
  72     endif
  73 
  74     HOSTCXX = $(CXX)
  75     HOSTCC  = $(CC)
  76   endif
  77 
  78   AS   = $(CC) -c -x assembler-with-cpp
  79 endif
  80 
  81 
  82 # -dumpversion in gcc-2.91 shows "egcs-2.91.66". In later version, it only
  83 # prints the numbers (e.g. "2.95", "3.2.1")
  84 CC_VER_MAJOR := $(shell $(CC) -dumpversion | sed 's/egcs-//' | cut -d'.' -f1)
  85 CC_VER_MINOR := $(shell $(CC) -dumpversion | sed 's/egcs-//' | cut -d'.' -f2)
  86 
  87 # check for precompiled headers support
  88 ifneq "$(shell expr \( $(CC_VER_MAJOR) \> 3 \) \| \( \( $(CC_VER_MAJOR) = 3 \) \& \( $(CC_VER_MINOR) \>= 4 \) \))" "0"
  89 # Allow the user to turn off precompiled headers from the command line.
  90 ifneq ($(USE_PRECOMPILED_HEADER),0)
  91 PRECOMPILED_HEADER_DIR=.
  92 PRECOMPILED_HEADER_SRC=$(GAMMADIR)/src/share/vm/precompiled/precompiled.hpp
  93 PRECOMPILED_HEADER=$(PRECOMPILED_HEADER_DIR)/precompiled.hpp.gch
  94 endif
  95 endif
  96 
  97 
  98 #------------------------------------------------------------------------
  99 # Compiler flags
 100 
 101 # position-independent code
 102 PICFLAG = -fPIC
 103 
 104 VM_PICFLAG/LIBJVM = $(PICFLAG)
 105 VM_PICFLAG/AOUT   =
 106 VM_PICFLAG        = $(VM_PICFLAG/$(LINK_INTO))
 107 
 108 ifeq ($(ZERO_BUILD), true)
 109 CFLAGS += $(LIBFFI_CFLAGS)
 110 endif
 111 ifeq ($(SHARK_BUILD), true)
 112 CFLAGS += $(LLVM_CFLAGS)
 113 endif
 114 CFLAGS += $(VM_PICFLAG)
 115 CFLAGS += -fno-rtti
 116 CFLAGS += -fno-exceptions
 117 CFLAGS += -pthread
 118 CFLAGS += -fcheck-new
 119 # version 4 and above support fvisibility=hidden (matches jni_x86.h file)
 120 # except 4.1.2 gives pointless warnings that can't be disabled (afaik)
 121 ifneq "$(shell expr \( $(CC_VER_MAJOR) \> 4 \) \| \( \( $(CC_VER_MAJOR) = 4 \) \& \( $(CC_VER_MINOR) \>= 3 \) \))" "0"
 122 CFLAGS += -fvisibility=hidden
 123 endif
 124 
 125 ARCHFLAG = $(ARCHFLAG/$(BUILDARCH))
 126 ARCHFLAG/i486    = -m32 -march=i586
 127 ARCHFLAG/amd64   = -m64
 128 ARCHFLAG/ia64    =
 129 ARCHFLAG/sparc   = -m32 -mcpu=v9
 130 ARCHFLAG/sparcv9 = -m64 -mcpu=v9
 131 ARCHFLAG/zero    = $(ZERO_ARCHFLAG)
 132 
 133 # Darwin-specific build flags
 134 ifeq ($(OS_VENDOR), Darwin)
 135   # Ineffecient 16-byte stack re-alignment on Darwin/IA32
 136   ARCHFLAG/i486 += -mstackrealign
 137 endif
 138 
 139 CFLAGS     += $(ARCHFLAG)
 140 AOUT_FLAGS += $(ARCHFLAG)
 141 LFLAGS     += $(ARCHFLAG)
 142 ASFLAGS    += $(ARCHFLAG)
 143 
 144 ifdef E500V2
 145 CFLAGS += -DE500V2
 146 endif
 147 
 148 # Use C++ Interpreter
 149 ifdef CC_INTERP
 150   CFLAGS += -DCC_INTERP
 151 endif
 152 
 153 # Build for embedded targets
 154 ifdef JAVASE_EMBEDDED
 155   CFLAGS += -DJAVASE_EMBEDDED
 156 endif
 157 
 158 # Keep temporary files (.ii, .s)
 159 ifdef NEED_ASM
 160   CFLAGS += -save-temps
 161 else
 162   CFLAGS += -pipe
 163 endif
 164 
 165 # Compiler warnings are treated as errors
 166 ifneq ($(COMPILER_WARNINGS_FATAL),false)
 167   WARNINGS_ARE_ERRORS = -Werror
 168 endif
 169 
 170 # Except for a few acceptable ones
 171 # Since GCC 4.3, -Wconversion has changed its meanings to warn these implicit
 172 # conversions which might affect the values. To avoid that, we need to turn
 173 # it off explicitly. 
 174 ifneq "$(shell expr \( $(CC_VER_MAJOR) \> 4 \) \| \( \( $(CC_VER_MAJOR) = 4 \) \& \( $(CC_VER_MINOR) \>= 3 \) \))" "0"
 175 ACCEPTABLE_WARNINGS = -Wpointer-arith -Wsign-compare
 176 else
 177 ACCEPTABLE_WARNINGS = -Wpointer-arith -Wconversion -Wsign-compare
 178 endif
 179 
 180 CFLAGS_WARN/DEFAULT = $(WARNINGS_ARE_ERRORS) $(ACCEPTABLE_WARNINGS)
 181 # Special cases
 182 CFLAGS_WARN/BYFILE = $(CFLAGS_WARN/$@)$(CFLAGS_WARN/DEFAULT$(CFLAGS_WARN/$@)) 
 183 # XXXDARWIN: for _dyld_bind_fully_image_containing_address
 184 ifeq ($(OS_VENDOR), Darwin)
 185   CFLAGS_WARN/os_bsd.o = $(CFLAGS_WARN/DEFAULT) -Wno-deprecated-declarations
 186 endif
 187 
 188 
 189 # The flags to use for an Optimized g++ build
 190 ifeq ($(OS_VENDOR), Darwin)
 191   # use -Os by default, unless -O3 can be proved to be worth the cost, as per policy
 192   # <http://wikis.sun.com/display/OpenJDK/Mac+OS+X+Port+Compilers>
 193   OPT_CFLAGS += -Os
 194 else
 195   OPT_CFLAGS += -O3
 196 endif
 197 
 198 # Hotspot uses very unstrict aliasing turn this optimization off
 199 OPT_CFLAGS += -fno-strict-aliasing
 200 
 201 # The gcc compiler segv's on ia64 when compiling bytecodeInterpreter.cpp 
 202 # if we use expensive-optimizations
 203 ifeq ($(BUILDARCH), ia64)
 204 OPT_CFLAGS += -fno-expensive-optimizations
 205 endif
 206 
 207 OPT_CFLAGS/NOOPT=-O0
 208 
 209 # 6835796. Problem in GCC 4.3.0 with mulnode.o optimized compilation. 
 210 ifneq "$(shell expr \( \( $(CC_VER_MAJOR) = 4 \) \& \( $(CC_VER_MINOR) = 3 \) \))" "0"
 211 OPT_CFLAGS/mulnode.o += -O0
 212 endif
 213 
 214 # Flags for generating make dependency flags.
 215 ifneq ("${CC_VER_MAJOR}", "2")
 216 DEPFLAGS = -MMD -MP -MF $(DEP_DIR)/$(@:%=%.d)
 217 endif
 218 
 219 # -DDONT_USE_PRECOMPILED_HEADER will exclude all includes in precompiled.hpp.
 220 ifeq ($(USE_PRECOMPILED_HEADER),0)
 221 CFLAGS += -DDONT_USE_PRECOMPILED_HEADER
 222 endif
 223 
 224 #------------------------------------------------------------------------
 225 # Linker flags
 226 
 227 # statically link libstdc++.so, work with gcc but ignored by g++
 228 STATIC_STDCXX = -Wl,-Bstatic -lstdc++ -Wl,-Bdynamic
 229 
 230 # statically link libgcc and/or libgcc_s, libgcc does not exist before gcc-3.x.
 231 ifneq ("${CC_VER_MAJOR}", "2")
 232 STATIC_LIBGCC += -static-libgcc
 233 endif
 234 
 235 ifeq ($(BUILDARCH), ia64)
 236 LFLAGS += -Wl,-relax
 237 endif
 238 
 239 # Use $(MAPFLAG:FILENAME=real_file_name) to specify a map file.
 240 MAPFLAG = -Xlinker --version-script=FILENAME
 241 
 242 #
 243 # Shared Library
 244 #
 245 ifeq ($(OS_VENDOR), Darwin)
 246   # Standard linker flags
 247   LFLAGS +=
 248 
 249   # Darwin doesn't use ELF and doesn't support version scripts
 250   LDNOMAP = true
 251 
 252   # Use $(SONAMEFLAG:SONAME=soname) to specify the intrinsic name of a shared obj
 253   SONAMEFLAG =
 254 
 255   # Build shared library
 256   SHARED_FLAG = -Wl,-install_name,@rpath/$(@F) -dynamiclib -compatibility_version 1.0.0 -current_version 1.0.0 $(VM_PICFLAG)
 257 
 258   # Keep symbols even they are not used
 259   #AOUT_FLAGS += -Xlinker -export-dynamic
 260 else
 261   # Enable linker optimization
 262   LFLAGS += -Xlinker -O1
 263 
 264   # Use $(SONAMEFLAG:SONAME=soname) to specify the intrinsic name of a shared obj
 265   SONAMEFLAG = -Xlinker -soname=SONAME
 266 
 267   # Build shared library
 268   SHARED_FLAG = -shared $(VM_PICFLAG)
 269 
 270   # Keep symbols even they are not used
 271   AOUT_FLAGS += -Xlinker -export-dynamic
 272 endif
 273 
 274 #------------------------------------------------------------------------
 275 # Debug flags
 276 
 277 # Use the stabs format for debugging information (this is the default
 278 # on gcc-2.91). It's good enough, has all the information about line
 279 # numbers and local variables, and libjvm_g.so is only about 16M.
 280 # Change this back to "-g" if you want the most expressive format.
 281 # (warning: that could easily inflate libjvm_g.so to 150M!)
 282 # Note: The Itanium gcc compiler crashes when using -gstabs.
 283 DEBUG_CFLAGS/ia64  = -g
 284 DEBUG_CFLAGS/amd64 = -g
 285 DEBUG_CFLAGS/arm   = -g
 286 DEBUG_CFLAGS/ppc   = -g
 287 DEBUG_CFLAGS += $(DEBUG_CFLAGS/$(BUILDARCH))
 288 ifeq ($(DEBUG_CFLAGS/$(BUILDARCH)),)
 289 DEBUG_CFLAGS += -gstabs
 290 endif
 291 
 292 # DEBUG_BINARIES overrides everything, use full -g debug information
 293 ifeq ($(DEBUG_BINARIES), true)
 294   DEBUG_CFLAGS = -g
 295   CFLAGS += $(DEBUG_CFLAGS)
 296 endif
 297 
 298 # If we are building HEADLESS, pass on to VM
 299 # so it can set the java.awt.headless property
 300 ifdef HEADLESS
 301 CFLAGS += -DHEADLESS
 302 endif
 303 
 304 # We are building Embedded for a small device
 305 # favor code space over speed
 306 ifdef MINIMIZE_RAM_USAGE
 307 CFLAGS += -DMINIMIZE_RAM_USAGE
 308 endif