1 #
   2 # Copyright (c) 1999, 2013, 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 = $(ALT_COMPILER_PATH)/strip
  38   else
  39     ifeq ($(USE_CLANG), true)
  40       CXX = clang++
  41       CC  = clang
  42     else
  43       CXX = g++
  44       CC  = gcc
  45     endif
  46 
  47     HOSTCXX = $(CXX)
  48     HOSTCC  = $(CC)
  49     STRIP = strip
  50   endif
  51   AS  = $(CC) -c
  52 endif
  53 
  54 
  55 ifeq ($(USE_CLANG), true)
  56   CC_VER_MAJOR := $(shell $(CC) -v 2>&1 | grep version | sed "s/.*version \([0-9]*\.[0-9]*\).*/\1/" | cut -d'.' -f1)
  57   CC_VER_MINOR := $(shell $(CC) -v 2>&1 | grep version | sed "s/.*version \([0-9]*\.[0-9]*\).*/\1/" | cut -d'.' -f2)
  58 else
  59   # -dumpversion in gcc-2.91 shows "egcs-2.91.66". In later version, it only
  60   # prints the numbers (e.g. "2.95", "3.2.1")
  61   CC_VER_MAJOR := $(shell $(CC) -dumpversion | sed 's/egcs-//' | cut -d'.' -f1)
  62   CC_VER_MINOR := $(shell $(CC) -dumpversion | sed 's/egcs-//' | cut -d'.' -f2)
  63 endif
  64 
  65 ifeq ($(USE_CLANG), true)
  66   # Clang has precompiled headers support by default, but the user can switch
  67   # it off by using 'USE_PRECOMPILED_HEADER=0'.
  68   ifdef LP64
  69     ifeq ($(USE_PRECOMPILED_HEADER),)
  70       USE_PRECOMPILED_HEADER=1
  71     endif
  72   else
  73     # We don't support precompiled headers on 32-bit builds because there some files are
  74     # compiled with -fPIC while others are compiled without (see 'NONPIC_OBJ_FILES' rules.make)
  75     # Clang produces an error if the PCH file was compiled with other options than the actual compilation unit.
  76     USE_PRECOMPILED_HEADER=0
  77   endif
  78 
  79   ifeq ($(USE_PRECOMPILED_HEADER),1)
  80 
  81     ifndef LP64
  82       $(error " Precompiled Headers only supported on 64-bit platforms!")
  83     endif
  84 
  85     PRECOMPILED_HEADER_DIR=.
  86     PRECOMPILED_HEADER_SRC=$(GAMMADIR)/src/share/vm/precompiled/precompiled.hpp
  87     PRECOMPILED_HEADER=$(PRECOMPILED_HEADER_DIR)/precompiled.hpp.pch
  88 
  89     PCH_FLAG = -include precompiled.hpp
  90     PCH_FLAG/DEFAULT = $(PCH_FLAG)
  91     PCH_FLAG/NO_PCH = -DNO_PCH
  92     PCH_FLAG/BY_FILE = $(PCH_FLAG/$@)$(PCH_FLAG/DEFAULT$(PCH_FLAG/$@))
  93 
  94     VM_PCH_FLAG/LIBJVM = $(PCH_FLAG/BY_FILE)
  95     VM_PCH_FLAG/AOUT =
  96     VM_PCH_FLAG = $(VM_PCH_FLAG/$(LINK_INTO))
  97 
  98     # We only use precompiled headers for the JVM build
  99     CFLAGS += $(VM_PCH_FLAG)
 100 
 101     # There are some files which don't like precompiled headers
 102     # The following files are build with 'OPT_CFLAGS/NOOPT' (-O0) in the opt build.
 103     # But Clang doesn't support a precompiled header which was compiled with -O3
 104     # to be used in a compilation unit which uses '-O0'. We could also prepare an
 105     # extra '-O0' PCH file for the opt build and use it here, but it's probably
 106     # not worth the effort as long as only two files need this special handling.
 107     PCH_FLAG/loopTransform.o = $(PCH_FLAG/NO_PCH)
 108     PCH_FLAG/sharedRuntimeTrig.o = $(PCH_FLAG/NO_PCH)
 109     PCH_FLAG/sharedRuntimeTrans.o = $(PCH_FLAG/NO_PCH)
 110 
 111   endif
 112 else # ($(USE_CLANG), true)
 113   # check for precompiled headers support
 114   ifneq "$(shell expr \( $(CC_VER_MAJOR) \> 3 \) \| \( \( $(CC_VER_MAJOR) = 3 \) \& \( $(CC_VER_MINOR) \>= 4 \) \))" "0"
 115     # Allow the user to turn off precompiled headers from the command line.
 116     ifneq ($(USE_PRECOMPILED_HEADER),0)
 117       PRECOMPILED_HEADER_DIR=.
 118       PRECOMPILED_HEADER_SRC=$(GAMMADIR)/src/share/vm/precompiled/precompiled.hpp
 119       PRECOMPILED_HEADER=$(PRECOMPILED_HEADER_DIR)/precompiled.hpp.gch
 120     endif
 121   endif
 122 endif
 123 
 124 # -DDONT_USE_PRECOMPILED_HEADER will exclude all includes in precompiled.hpp.
 125 ifeq ($(USE_PRECOMPILED_HEADER),0)
 126   CFLAGS += -DDONT_USE_PRECOMPILED_HEADER
 127 endif
 128 
 129 
 130 #------------------------------------------------------------------------
 131 # Compiler flags
 132 
 133 # position-independent code
 134 PICFLAG = -fPIC
 135 
 136 VM_PICFLAG/LIBJVM = $(PICFLAG)
 137 VM_PICFLAG/AOUT   =
 138 VM_PICFLAG        = $(VM_PICFLAG/$(LINK_INTO))
 139 
 140 ifeq ($(JVM_VARIANT_ZERO), true)
 141 CFLAGS += $(LIBFFI_CFLAGS)
 142 endif
 143 ifeq ($(JVM_VARIANT_ZEROSHARK), true)
 144 CFLAGS += $(LIBFFI_CFLAGS)
 145 CFLAGS += $(LLVM_CFLAGS)
 146 endif
 147 CFLAGS += $(VM_PICFLAG)
 148 CFLAGS += -fno-rtti
 149 CFLAGS += -fno-exceptions
 150 CFLAGS += -D_REENTRANT
 151 ifeq ($(USE_CLANG),)
 152   CFLAGS += -fcheck-new
 153   # version 4 and above support fvisibility=hidden (matches jni_x86.h file)
 154   # except 4.1.2 gives pointless warnings that can't be disabled (afaik)
 155   ifneq "$(shell expr \( $(CC_VER_MAJOR) \> 4 \) \| \( \( $(CC_VER_MAJOR) = 4 \) \& \( $(CC_VER_MINOR) \>= 3 \) \))" "0"
 156     CFLAGS += -fvisibility=hidden
 157   endif
 158 else
 159   CFLAGS += -fvisibility=hidden
 160 endif
 161 
 162 ifeq ($(USE_CLANG), true)
 163   # Before Clang 3.1, we had to pass the stack alignment specification directly to llvm with the help of '-mllvm'
 164   # Starting with version 3.1, Clang understands the '-mstack-alignment' (and rejects '-mllvm -stack-alignment')
 165   ifneq "$(shell expr \( $(CC_VER_MAJOR) \> 3 \) \| \( \( $(CC_VER_MAJOR) = 3 \) \& \( $(CC_VER_MINOR) \>= 1 \) \))" "0"
 166     STACK_ALIGNMENT_OPT = -mno-omit-leaf-frame-pointer -mstack-alignment=16
 167   else
 168     STACK_ALIGNMENT_OPT = -mno-omit-leaf-frame-pointer -mllvm -stack-alignment=16
 169   endif
 170 endif
 171 
 172 ARCHFLAG = $(ARCHFLAG/$(BUILDARCH))
 173 ARCHFLAG/i486    = -m32 -march=i586
 174 ARCHFLAG/amd64   = -m64 $(STACK_ALIGNMENT_OPT)
 175 ARCHFLAG/ia64    =
 176 ARCHFLAG/sparc   = -m32 -mcpu=v9
 177 ARCHFLAG/sparcv9 = -m64 -mcpu=v9
 178 ARCHFLAG/arm     =  -fsigned-char
 179 ARCHFLAG/zero    = $(ZERO_ARCHFLAG)
 180 ifndef E500V2
 181 ARCHFLAG/ppc     =  -mcpu=powerpc
 182 endif
 183 ARCHFLAG/ppc64   =  -m64
 184 
 185 CFLAGS     += $(ARCHFLAG)
 186 AOUT_FLAGS += $(ARCHFLAG)
 187 LFLAGS     += $(ARCHFLAG)
 188 ASFLAGS    += $(ARCHFLAG)
 189 
 190 ifdef E500V2
 191 CFLAGS += -DE500V2
 192 endif
 193 
 194 # Use C++ Interpreter
 195 ifdef CC_INTERP
 196   CFLAGS += -DCC_INTERP
 197 endif
 198 
 199 # Keep temporary files (.ii, .s)
 200 ifdef NEED_ASM
 201   CFLAGS += -save-temps
 202 else
 203   CFLAGS += -pipe
 204 endif
 205 
 206 # Compiler warnings are treated as errors
 207 WARNINGS_ARE_ERRORS = -Werror
 208 
 209 ifeq ($(USE_CLANG), true)
 210   # However we need to clean the code up before we can unrestrictedly enable this option with Clang
 211   WARNINGS_ARE_ERRORS += -Wno-logical-op-parentheses -Wno-parentheses-equality -Wno-parentheses
 212   WARNINGS_ARE_ERRORS += -Wno-switch -Wno-tautological-constant-out-of-range-compare -Wno-tautological-compare
 213   WARNINGS_ARE_ERRORS += -Wno-delete-non-virtual-dtor -Wno-deprecated -Wno-format -Wno-dynamic-class-memaccess
 214   WARNINGS_ARE_ERRORS += -Wno-return-type -Wno-empty-body
 215 endif
 216 
 217 WARNING_FLAGS = -Wpointer-arith -Wsign-compare -Wundef -Wunused-function -Wunused-value -Wformat=2 -Wreturn-type
 218 
 219 ifeq ($(USE_CLANG),)
 220   # Since GCC 4.3, -Wconversion has changed its meanings to warn these implicit
 221   # conversions which might affect the values. Only enable it in earlier versions.
 222   ifeq "$(shell expr \( $(CC_VER_MAJOR) \> 4 \) \| \( \( $(CC_VER_MAJOR) = 4 \) \& \( $(CC_VER_MINOR) \>= 3 \) \))" "0"
 223     WARNING_FLAGS += -Wconversion
 224   else 
 225     # This flag is only known since GCC 4.3.
 226     WARNING_FLAGS += -Wtype-limits
 227   endif
 228 endif
 229 
 230 CFLAGS_WARN/DEFAULT = $(WARNINGS_ARE_ERRORS) $(WARNING_FLAGS)
 231 
 232 # Special cases
 233 CFLAGS_WARN/BYFILE = $(CFLAGS_WARN/$@)$(CFLAGS_WARN/DEFAULT$(CFLAGS_WARN/$@))
 234 
 235 # optimization control flags (Used by fastdebug and release variants)
 236 OPT_CFLAGS/NOOPT=-O0
 237 OPT_CFLAGS/DEBUG=-O0
 238 OPT_CFLAGS/SIZE=-Os
 239 OPT_CFLAGS/SPEED=-O3
 240 
 241 OPT_CFLAGS_DEFAULT ?= SPEED
 242 
 243 # Hotspot uses very unstrict aliasing turn this optimization off
 244 # This option is added to CFLAGS rather than OPT_CFLAGS
 245 # so that OPT_CFLAGS overrides get this option too.
 246 CFLAGS += -fno-strict-aliasing
 247 
 248 ifdef OPT_CFLAGS
 249   ifneq ("$(origin OPT_CFLAGS)", "command line")
 250     $(error " Use OPT_EXTRAS instead of OPT_CFLAGS to add extra flags to OPT_CFLAGS.")
 251   endif
 252 endif
 253 
 254 OPT_CFLAGS = $(OPT_CFLAGS/$(OPT_CFLAGS_DEFAULT)) $(OPT_EXTRAS)
 255 
 256 # The gcc compiler segv's on ia64 when compiling bytecodeInterpreter.cpp
 257 # if we use expensive-optimizations
 258 ifeq ($(BUILDARCH), ia64)
 259 OPT_CFLAGS += -fno-expensive-optimizations
 260 endif
 261 
 262 # Work around some compiler bugs.
 263 ifeq ($(USE_CLANG), true)
 264   ifeq ($(shell expr $(CC_VER_MAJOR) = 4 \& $(CC_VER_MINOR) = 2), 1)
 265     OPT_CFLAGS/loopTransform.o += $(OPT_CFLAGS/NOOPT)
 266   endif
 267 else
 268   # 6835796. Problem in GCC 4.3.0 with mulnode.o optimized compilation.
 269   ifeq ($(shell expr $(CC_VER_MAJOR) = 4 \& $(CC_VER_MINOR) = 3), 1)
 270     OPT_CFLAGS/mulnode.o += $(OPT_CFLAGS/NOOPT)
 271   endif
 272 endif
 273 
 274 # Flags for generating make dependency flags.
 275 DEPFLAGS = -MMD -MP -MF $(DEP_DIR)/$(@:%=%.d)
 276 ifeq ($(USE_CLANG),)
 277   ifneq ($(CC_VER_MAJOR), 2)
 278     DEPFLAGS += -fpch-deps
 279   endif
 280 endif
 281 
 282 #------------------------------------------------------------------------
 283 # Linker flags
 284 
 285 # statically link libstdc++.so, work with gcc but ignored by g++
 286 STATIC_STDCXX = -Wl,-Bstatic -lstdc++ -Wl,-Bdynamic
 287 
 288 # Enable linker optimization
 289 LFLAGS += -Xlinker -O1
 290 
 291 ifeq ($(USE_CLANG),)
 292   STATIC_LIBGCC += -static-libgcc
 293 
 294   ifneq (, findstring(debug,$(BUILD_FLAVOR)))
 295     # for relocations read-only
 296     LFLAGS += -Xlinker -z -Xlinker relro
 297 
 298     ifeq ($(BUILD_FLAVOR), debug)
 299       # disable incremental relocations linking
 300       LFLAGS += -Xlinker -z -Xlinker now
 301     endif
 302   endif
 303 
 304   ifeq ($(BUILDARCH), ia64)
 305     LFLAGS += -Wl,-relax
 306   endif
 307 
 308   # If this is a --hash-style=gnu system, use --hash-style=both
 309   #   The gnu .hash section won't work on some Linux systems like SuSE 10.
 310   _HAS_HASH_STYLE_GNU:=$(shell $(CC) -dumpspecs | grep -- '--hash-style=gnu')
 311   ifneq ($(_HAS_HASH_STYLE_GNU),)
 312     LDFLAGS_HASH_STYLE = -Wl,--hash-style=both
 313   endif
 314 else
 315   # Don't know how to find out the 'hash style' of a system as '-dumpspecs'
 316   # doesn't work for Clang. So for now we'll alwys use --hash-style=both
 317   LDFLAGS_HASH_STYLE = -Wl,--hash-style=both
 318 endif
 319 
 320 LFLAGS += $(LDFLAGS_HASH_STYLE)
 321 
 322 # Use $(MAPFLAG:FILENAME=real_file_name) to specify a map file.
 323 MAPFLAG = -Xlinker --version-script=FILENAME
 324 
 325 # Use $(SONAMEFLAG:SONAME=soname) to specify the intrinsic name of a shared obj
 326 SONAMEFLAG = -Xlinker -soname=SONAME
 327 
 328 # Build shared library
 329 SHARED_FLAG = -shared
 330 
 331 # Keep symbols even they are not used
 332 AOUT_FLAGS += -Xlinker -export-dynamic
 333 
 334 #------------------------------------------------------------------------
 335 # Debug flags
 336 
 337 ifeq ($(USE_CLANG), true)
 338   # Restrict the debug information created by Clang to avoid
 339   # too big object files and speed the build up a little bit
 340   # (see http://llvm.org/bugs/show_bug.cgi?id=7554)
 341   CFLAGS += -flimit-debug-info
 342 endif
 343 
 344 # Allow no optimizations.
 345 DEBUG_CFLAGS=-O0
 346 
 347 # DEBUG_BINARIES uses full -g debug information for all configs
 348 ifeq ($(DEBUG_BINARIES), true)
 349   CFLAGS += -g
 350 else
 351   DEBUG_CFLAGS += $(DEBUG_CFLAGS/$(BUILDARCH))
 352   ifeq ($(DEBUG_CFLAGS/$(BUILDARCH)),)
 353     DEBUG_CFLAGS += -g
 354   endif
 355 
 356   ifeq ($(ENABLE_FULL_DEBUG_SYMBOLS),1)
 357     FASTDEBUG_CFLAGS += $(FASTDEBUG_CFLAGS/$(BUILDARCH))
 358     ifeq ($(FASTDEBUG_CFLAGS/$(BUILDARCH)),)
 359       FASTDEBUG_CFLAGS += -g
 360     endif
 361 
 362     OPT_CFLAGS += $(OPT_CFLAGS/$(BUILDARCH))
 363     ifeq ($(OPT_CFLAGS/$(BUILDARCH)),)
 364       OPT_CFLAGS += -g
 365     endif
 366   endif
 367 endif
 368 
 369 ifeq ($(USE_CLANG),)
 370   # Enable bounds checking.
 371   ifeq "$(shell expr \( $(CC_VER_MAJOR) \> 3 \) )" "1"
 372     # stack smashing checks.
 373     DEBUG_CFLAGS += -fstack-protector-all --param ssp-buffer-size=1
 374   endif
 375 endif
 376 
 377 
 378 # If we are building HEADLESS, pass on to VM
 379 # so it can set the java.awt.headless property
 380 ifdef HEADLESS
 381 CFLAGS += -DHEADLESS
 382 endif
 383 
 384 # We are building Embedded for a small device
 385 # favor code space over speed
 386 ifdef MINIMIZE_RAM_USAGE
 387 CFLAGS += -DMINIMIZE_RAM_USAGE
 388 endif
 389 
 390 # Stack walking in the JVM relies on frame pointer (%rbp) to walk thread stack.
 391 # Explicitly specify -fno-omit-frame-pointer because it is off by default
 392 # starting with gcc 4.6.
 393 ifndef USE_SUNCC
 394   CFLAGS += -fno-omit-frame-pointer
 395 endif