1 #
   2 # Copyright (c) 1999, 2012, 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 # If a SPEC is not set already, then use these defaults.
  29 ifeq ($(SPEC),)
  30   # When cross-compiling the ALT_COMPILER_PATH points
  31   # to the cross-compilation toolset
  32   ifdef CROSS_COMPILE_ARCH
  33     CXX = $(ALT_COMPILER_PATH)/g++
  34     CC  = $(ALT_COMPILER_PATH)/gcc
  35     HOSTCXX = g++
  36     HOSTCC  = gcc
  37     STRIP = $(ALT_COMPILER_PATH)/strip
  38   else
  39     CXX = g++
  40     CC  = gcc
  41     HOSTCXX = $(CXX)
  42     HOSTCC  = $(CC)
  43     STRIP = strip
  44   endif
  45   AS  = $(CC) -c
  46 endif
  47 
  48 
  49 # -dumpversion in gcc-2.91 shows "egcs-2.91.66". In later version, it only
  50 # prints the numbers (e.g. "2.95", "3.2.1")
  51 CC_VER_MAJOR := $(shell $(CC) -dumpversion | sed 's/egcs-//' | cut -d'.' -f1)
  52 CC_VER_MINOR := $(shell $(CC) -dumpversion | sed 's/egcs-//' | cut -d'.' -f2)
  53 
  54 # check for precompiled headers support
  55 ifneq "$(shell expr \( $(CC_VER_MAJOR) \> 3 \) \| \( \( $(CC_VER_MAJOR) = 3 \) \& \( $(CC_VER_MINOR) \>= 4 \) \))" "0"
  56 # Allow the user to turn off precompiled headers from the command line.
  57 ifneq ($(USE_PRECOMPILED_HEADER),0)
  58 PRECOMPILED_HEADER_DIR=.
  59 PRECOMPILED_HEADER_SRC=$(GAMMADIR)/src/share/vm/precompiled/precompiled.hpp
  60 PRECOMPILED_HEADER=$(PRECOMPILED_HEADER_DIR)/precompiled.hpp.gch
  61 endif
  62 endif
  63 
  64 
  65 #------------------------------------------------------------------------
  66 # Compiler flags
  67 
  68 # position-independent code
  69 PICFLAG = -fPIC
  70 
  71 VM_PICFLAG/LIBJVM = $(PICFLAG)
  72 VM_PICFLAG/AOUT   =
  73 VM_PICFLAG        = $(VM_PICFLAG/$(LINK_INTO))
  74 
  75 ifeq ($(ZERO_BUILD), true)
  76 CFLAGS += $(LIBFFI_CFLAGS)
  77 endif
  78 ifeq ($(SHARK_BUILD), true)
  79 CFLAGS += $(LLVM_CFLAGS)
  80 endif
  81 CFLAGS += $(VM_PICFLAG)
  82 CFLAGS += -fno-rtti
  83 CFLAGS += -fno-exceptions
  84 CFLAGS += -D_REENTRANT
  85 CFLAGS += -fcheck-new
  86 # version 4 and above support fvisibility=hidden (matches jni_x86.h file)
  87 # except 4.1.2 gives pointless warnings that can't be disabled (afaik)
  88 ifneq "$(shell expr \( $(CC_VER_MAJOR) \> 4 \) \| \( \( $(CC_VER_MAJOR) = 4 \) \& \( $(CC_VER_MINOR) \>= 3 \) \))" "0"
  89 CFLAGS += -fvisibility=hidden
  90 endif
  91 
  92 ARCHFLAG = $(ARCHFLAG/$(BUILDARCH))
  93 ARCHFLAG/i486    = -m32 -march=i586
  94 ARCHFLAG/amd64   = -m64
  95 ARCHFLAG/ia64    =
  96 ARCHFLAG/sparc   = -m32 -mcpu=v9
  97 ARCHFLAG/sparcv9 = -m64 -mcpu=v9
  98 ARCHFLAG/arm     =  -fsigned-char
  99 ARCHFLAG/zero    = $(ZERO_ARCHFLAG)
 100 ifndef E500V2
 101 ARCHFLAG/ppc     =  -mcpu=powerpc
 102 endif
 103 
 104 CFLAGS     += $(ARCHFLAG)
 105 AOUT_FLAGS += $(ARCHFLAG)
 106 LFLAGS     += $(ARCHFLAG)
 107 ASFLAGS    += $(ARCHFLAG)
 108 
 109 ifdef E500V2
 110 CFLAGS += -DE500V2
 111 endif
 112 
 113 # Use C++ Interpreter
 114 ifdef CC_INTERP
 115   CFLAGS += -DCC_INTERP
 116 endif
 117 
 118 # Build for embedded targets
 119 ifdef JAVASE_EMBEDDED
 120   CFLAGS += -DJAVASE_EMBEDDED
 121 endif
 122 
 123 # Keep temporary files (.ii, .s)
 124 ifdef NEED_ASM
 125   CFLAGS += -save-temps
 126 else
 127   CFLAGS += -pipe
 128 endif
 129 
 130 # Compiler warnings are treated as errors
 131 WARNINGS_ARE_ERRORS = -Werror
 132 
 133 # Except for a few acceptable ones
 134 # Since GCC 4.3, -Wconversion has changed its meanings to warn these implicit
 135 # conversions which might affect the values. To avoid that, we need to turn
 136 # it off explicitly. 
 137 ifneq "$(shell expr \( $(CC_VER_MAJOR) \> 4 \) \| \( \( $(CC_VER_MAJOR) = 4 \) \& \( $(CC_VER_MINOR) \>= 3 \) \))" "0"
 138 ACCEPTABLE_WARNINGS = -Wpointer-arith -Wsign-compare
 139 else
 140 ACCEPTABLE_WARNINGS = -Wpointer-arith -Wconversion -Wsign-compare
 141 endif
 142 
 143 CFLAGS_WARN/DEFAULT = $(WARNINGS_ARE_ERRORS) $(ACCEPTABLE_WARNINGS)
 144 # Special cases
 145 CFLAGS_WARN/BYFILE = $(CFLAGS_WARN/$@)$(CFLAGS_WARN/DEFAULT$(CFLAGS_WARN/$@)) 
 146 
 147 # The flags to use for an Optimized g++ build
 148 OPT_CFLAGS += -O3
 149 
 150 # Hotspot uses very unstrict aliasing turn this optimization off
 151 OPT_CFLAGS += -fno-strict-aliasing
 152 
 153 # The gcc compiler segv's on ia64 when compiling bytecodeInterpreter.cpp 
 154 # if we use expensive-optimizations
 155 ifeq ($(BUILDARCH), ia64)
 156 OPT_CFLAGS += -fno-expensive-optimizations
 157 endif
 158 
 159 OPT_CFLAGS/NOOPT=-O0
 160 
 161 # 6835796. Problem in GCC 4.3.0 with mulnode.o optimized compilation. 
 162 ifneq "$(shell expr \( \( $(CC_VER_MAJOR) = 4 \) \& \( $(CC_VER_MINOR) = 3 \) \))" "0"
 163 OPT_CFLAGS/mulnode.o += -O0
 164 endif
 165 
 166 # Flags for generating make dependency flags.
 167 ifneq ("${CC_VER_MAJOR}", "2")
 168 DEPFLAGS = -MMD -MP -MF $(DEP_DIR)/$(@:%=%.d)
 169 endif
 170 
 171 # -DDONT_USE_PRECOMPILED_HEADER will exclude all includes in precompiled.hpp.
 172 ifeq ($(USE_PRECOMPILED_HEADER),0)
 173 CFLAGS += -DDONT_USE_PRECOMPILED_HEADER
 174 endif
 175 
 176 #------------------------------------------------------------------------
 177 # Linker flags
 178 
 179 # statically link libstdc++.so, work with gcc but ignored by g++
 180 STATIC_STDCXX = -Wl,-Bstatic -lstdc++ -Wl,-Bdynamic
 181 
 182 # statically link libgcc and/or libgcc_s, libgcc does not exist before gcc-3.x.
 183 ifneq ("${CC_VER_MAJOR}", "2")
 184 STATIC_LIBGCC += -static-libgcc
 185 endif
 186 
 187 ifeq ($(BUILDARCH), ia64)
 188 LFLAGS += -Wl,-relax
 189 endif
 190 
 191 # Enable linker optimization
 192 LFLAGS += -Xlinker -O1
 193 
 194 # If this is a --hash-style=gnu system, use --hash-style=both
 195 #   The gnu .hash section won't work on some Linux systems like SuSE 10.
 196 _HAS_HASH_STYLE_GNU:=$(shell $(CC) -dumpspecs | grep -- '--hash-style=gnu')
 197 ifneq ($(_HAS_HASH_STYLE_GNU),)
 198   LDFLAGS_HASH_STYLE = -Wl,--hash-style=both
 199 endif
 200 LFLAGS += $(LDFLAGS_HASH_STYLE)
 201 
 202 # Use $(MAPFLAG:FILENAME=real_file_name) to specify a map file.
 203 MAPFLAG = -Xlinker --version-script=FILENAME
 204 
 205 # Use $(SONAMEFLAG:SONAME=soname) to specify the intrinsic name of a shared obj
 206 SONAMEFLAG = -Xlinker -soname=SONAME
 207 
 208 # Build shared library
 209 SHARED_FLAG = -shared
 210 
 211 # Keep symbols even they are not used
 212 AOUT_FLAGS += -Xlinker -export-dynamic
 213 
 214 #------------------------------------------------------------------------
 215 # Debug flags
 216 
 217 # Use the stabs format for debugging information (this is the default
 218 # on gcc-2.91). It's good enough, has all the information about line
 219 # numbers and local variables, and libjvm_g.so is only about 16M.
 220 # Change this back to "-g" if you want the most expressive format.
 221 # (warning: that could easily inflate libjvm_g.so to 150M!)
 222 # Note: The Itanium gcc compiler crashes when using -gstabs.
 223 DEBUG_CFLAGS/ia64  = -g
 224 DEBUG_CFLAGS/amd64 = -g
 225 DEBUG_CFLAGS/arm   = -g
 226 DEBUG_CFLAGS/ppc   = -g
 227 DEBUG_CFLAGS += $(DEBUG_CFLAGS/$(BUILDARCH))
 228 ifeq ($(DEBUG_CFLAGS/$(BUILDARCH)),)
 229 DEBUG_CFLAGS += -gstabs
 230 endif
 231 
 232 ifeq ($(ENABLE_FULL_DEBUG_SYMBOLS),1)
 233   FASTDEBUG_CFLAGS/ia64  = -g
 234   FASTDEBUG_CFLAGS/amd64 = -g
 235   FASTDEBUG_CFLAGS/arm   = -g
 236   FASTDEBUG_CFLAGS/ppc   = -g
 237   FASTDEBUG_CFLAGS += $(DEBUG_CFLAGS/$(BUILDARCH))
 238   ifeq ($(FASTDEBUG_CFLAGS/$(BUILDARCH)),)
 239     FASTDEBUG_CFLAGS += -gstabs
 240   endif
 241 
 242   OPT_CFLAGS/ia64  = -g
 243   OPT_CFLAGS/amd64 = -g
 244   OPT_CFLAGS/arm   = -g
 245   OPT_CFLAGS/ppc   = -g
 246   OPT_CFLAGS += $(OPT_CFLAGS/$(BUILDARCH))
 247   ifeq ($(OPT_CFLAGS/$(BUILDARCH)),)
 248     OPT_CFLAGS += -gstabs
 249   endif
 250 endif
 251 
 252 # DEBUG_BINARIES overrides everything, use full -g debug information
 253 ifeq ($(DEBUG_BINARIES), true)
 254   DEBUG_CFLAGS = -g
 255   CFLAGS += $(DEBUG_CFLAGS)
 256 endif
 257 
 258 # If we are building HEADLESS, pass on to VM
 259 # so it can set the java.awt.headless property
 260 ifdef HEADLESS
 261 CFLAGS += -DHEADLESS
 262 endif
 263 
 264 # We are building Embedded for a small device
 265 # favor code space over speed
 266 ifdef MINIMIZE_RAM_USAGE
 267 CFLAGS += -DMINIMIZE_RAM_USAGE
 268 endif