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 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  = $(CC32)
  72     endif
  73 
  74     ifeq ($(USE_CLANG), true)
  75       CXX = clang++
  76       CC  = clang
  77     endif
  78 
  79     HOSTCXX = $(CXX)
  80     HOSTCC  = $(CC)
  81   endif
  82 
  83   AS   = $(CC) -c -x assembler-with-cpp
  84 endif
  85 
  86 
  87 ifeq ($(USE_CLANG), true)
  88   CC_VER_MAJOR := $(shell $(CC) -v 2>&1 | grep version | sed "s/.*version \([0-9]*\.[0-9]*\).*/\1/" | cut -d'.' -f1)
  89   CC_VER_MINOR := $(shell $(CC) -v 2>&1 | grep version | sed "s/.*version \([0-9]*\.[0-9]*\).*/\1/" | cut -d'.' -f2)
  90 else
  91   # -dumpversion in gcc-2.91 shows "egcs-2.91.66". In later version, it only
  92   # prints the numbers (e.g. "2.95", "3.2.1")
  93   CC_VER_MAJOR := $(shell $(CC) -dumpversion | sed 's/egcs-//' | cut -d'.' -f1)
  94   CC_VER_MINOR := $(shell $(CC) -dumpversion | sed 's/egcs-//' | cut -d'.' -f2)
  95 endif
  96 
  97 ifeq ($(USE_CLANG), true)
  98   # clang has precompiled headers support by default, but the user can switch
  99   # it off by using 'USE_PRECOMPILED_HEADER=0'.
 100   ifdef LP64
 101     ifeq ($(USE_PRECOMPILED_HEADER),)
 102       USE_PRECOMPILED_HEADER=1
 103     endif
 104   else
 105     # We don't support precompiled headers on 32-bit builds because there some files are
 106     # compiled with -fPIC while others are compiled without (see 'NONPIC_OBJ_FILES' rules.make)
 107     # Clang produces an error if the PCH file was compiled with other options than the actual compilation unit.
 108     USE_PRECOMPILED_HEADER=0
 109   endif
 110   
 111   ifeq ($(USE_PRECOMPILED_HEADER),1)
 112   
 113     ifndef LP64
 114       $(error " Precompiled Headers only supported on 64-bit platforms!")
 115     endif
 116   
 117     PRECOMPILED_HEADER_DIR=.
 118     PRECOMPILED_HEADER_SRC=$(GAMMADIR)/src/share/vm/precompiled/precompiled.hpp
 119     PRECOMPILED_HEADER=$(PRECOMPILED_HEADER_DIR)/precompiled.hpp.pch
 120   
 121     PCH_FLAG = -include precompiled.hpp
 122     PCH_FLAG/DEFAULT = $(PCH_FLAG)
 123     PCH_FLAG/NO_PCH = -DNO_PCH
 124     PCH_FLAG/BY_FILE = $(PCH_FLAG/$@)$(PCH_FLAG/DEFAULT$(PCH_FLAG/$@))
 125   
 126     VM_PCH_FLAG/LIBJVM = $(PCH_FLAG/BY_FILE)
 127     VM_PCH_FLAG/AOUT =
 128     VM_PCH_FLAG = $(VM_PCH_FLAG/$(LINK_INTO))
 129   
 130     # We only use precompiled headers for the JVM build
 131     CFLAGS += $(VM_PCH_FLAG)
 132   
 133     # There are some files which don't like precompiled headers
 134     # The following files are build with 'OPT_CFLAGS/NOOPT' (-O0) in the opt build.
 135     # But Clang doesn't support a precompiled header which was compiled with -O3
 136     # to be used in a compilation unit which uses '-O0'. We could also prepare an
 137     # extra '-O0' PCH file for the opt build and use it here, but it's probably
 138     # not worth the effort as long as only two files need this special handling.
 139     PCH_FLAG/loopTransform.o = $(PCH_FLAG/NO_PCH)
 140     PCH_FLAG/sharedRuntimeTrig.o = $(PCH_FLAG/NO_PCH)
 141     PCH_FLAG/sharedRuntimeTrans.o = $(PCH_FLAG/NO_PCH)
 142   
 143   endif
 144 else # ($(USE_CLANG), true)
 145   # check for precompiled headers support
 146   ifneq "$(shell expr \( $(CC_VER_MAJOR) \> 3 \) \| \( \( $(CC_VER_MAJOR) = 3 \) \& \( $(CC_VER_MINOR) \>= 4 \) \))" "0"
 147     # Allow the user to turn off precompiled headers from the command line.
 148     ifneq ($(USE_PRECOMPILED_HEADER),0)
 149       PRECOMPILED_HEADER_DIR=.
 150       PRECOMPILED_HEADER_SRC=$(GAMMADIR)/src/share/vm/precompiled/precompiled.hpp
 151       PRECOMPILED_HEADER=$(PRECOMPILED_HEADER_DIR)/precompiled.hpp.gch
 152     endif
 153   endif
 154 endif
 155 
 156 # -DDONT_USE_PRECOMPILED_HEADER will exclude all includes in precompiled.hpp.
 157 ifeq ($(USE_PRECOMPILED_HEADER),0)
 158   CFLAGS += -DDONT_USE_PRECOMPILED_HEADER
 159 endif
 160 
 161 #------------------------------------------------------------------------
 162 # Compiler flags
 163 
 164 # position-independent code
 165 PICFLAG = -fPIC
 166 
 167 VM_PICFLAG/LIBJVM = $(PICFLAG)
 168 VM_PICFLAG/AOUT   =
 169 VM_PICFLAG        = $(VM_PICFLAG/$(LINK_INTO))
 170 
 171 ifeq ($(JVM_VARIANT_ZERO), true)
 172   CFLAGS += $(LIBFFI_CFLAGS)
 173 endif
 174 ifeq ($(JVM_VARIANT_ZEROSHARK), true)
 175   CFLAGS += $(LIBFFI_CFLAGS)
 176   CFLAGS += $(LLVM_CFLAGS)
 177 endif
 178 CFLAGS += $(VM_PICFLAG)
 179 CFLAGS += -fno-rtti
 180 CFLAGS += -fno-exceptions
 181 ifeq ($(USE_CLANG),)
 182   CFLAGS += -pthread
 183   CFLAGS += -fcheck-new
 184   # version 4 and above support fvisibility=hidden (matches jni_x86.h file)
 185   # except 4.1.2 gives pointless warnings that can't be disabled (afaik)
 186   ifneq "$(shell expr \( $(CC_VER_MAJOR) \> 4 \) \| \( \( $(CC_VER_MAJOR) = 4 \) \& \( $(CC_VER_MINOR) \>= 3 \) \))" "0"
 187     CFLAGS += -fvisibility=hidden
 188   endif
 189 else
 190   CFLAGS += -fvisibility=hidden
 191 endif
 192 
 193 ifeq ($(USE_CLANG), true)
 194   # Before Clang 3.1, we had to pass the stack alignment specification directly to llvm with the help of '-mllvm'
 195   # Starting with version 3.1, Clang understands the '-mstack-alignment' (and rejects '-mllvm -stack-alignment')
 196   ifneq "$(shell expr \( $(CC_VER_MAJOR) \> 3 \) \| \( \( $(CC_VER_MAJOR) = 3 \) \& \( $(CC_VER_MINOR) \>= 1 \) \))" "0"
 197     STACK_ALIGNMENT_OPT = -mno-omit-leaf-frame-pointer -mstack-alignment=16
 198   else
 199     STACK_ALIGNMENT_OPT = -mno-omit-leaf-frame-pointer -mllvm -stack-alignment=16
 200   endif
 201 endif
 202 
 203 ARCHFLAG = $(ARCHFLAG/$(BUILDARCH))
 204 ARCHFLAG/i486    = -m32 -march=i586
 205 ARCHFLAG/amd64   = -m64 $(STACK_ALIGNMENT_OPT)
 206 ARCHFLAG/ia64    =
 207 ARCHFLAG/sparc   = -m32 -mcpu=v9
 208 ARCHFLAG/sparcv9 = -m64 -mcpu=v9
 209 ARCHFLAG/zero    = $(ZERO_ARCHFLAG)
 210 
 211 # Darwin-specific build flags
 212 ifeq ($(OS_VENDOR), Darwin)
 213   # Ineffecient 16-byte stack re-alignment on Darwin/IA32
 214   ARCHFLAG/i486 += -mstackrealign
 215 endif
 216 
 217 CFLAGS     += $(ARCHFLAG)
 218 AOUT_FLAGS += $(ARCHFLAG)
 219 LFLAGS     += $(ARCHFLAG)
 220 ASFLAGS    += $(ARCHFLAG)
 221 
 222 ifdef E500V2
 223 CFLAGS += -DE500V2
 224 endif
 225 
 226 # Use C++ Interpreter
 227 ifdef CC_INTERP
 228   CFLAGS += -DCC_INTERP
 229 endif
 230 
 231 # Keep temporary files (.ii, .s)
 232 ifdef NEED_ASM
 233   CFLAGS += -save-temps
 234 else
 235   CFLAGS += -pipe
 236 endif
 237 
 238 # Compiler warnings are treated as errors
 239 ifneq ($(COMPILER_WARNINGS_FATAL),false)
 240   WARNINGS_ARE_ERRORS = -Werror
 241 endif
 242 
 243 ifeq ($(USE_CLANG), true)
 244   # However we need to clean the code up before we can unrestrictedly enable this option with Clang
 245   WARNINGS_ARE_ERRORS += -Wno-unused-value -Wno-logical-op-parentheses -Wno-parentheses-equality -Wno-parentheses
 246   WARNINGS_ARE_ERRORS += -Wno-switch -Wno-tautological-compare
 247 # Not yet supported by clang in Xcode 4.6.2
 248 #  WARNINGS_ARE_ERRORS += -Wno-tautological-constant-out-of-range-compare
 249   WARNINGS_ARE_ERRORS += -Wno-delete-non-virtual-dtor -Wno-deprecated -Wno-format -Wno-dynamic-class-memaccess
 250   WARNINGS_ARE_ERRORS += -Wno-empty-body
 251 endif
 252 
 253 WARNING_FLAGS = -Wpointer-arith -Wsign-compare -Wundef
 254 
 255 ifeq "$(shell expr \( $(CC_VER_MAJOR) \> 4 \) \| \( \( $(CC_VER_MAJOR) = 4 \) \& \( $(CC_VER_MINOR) \>= 3 \) \))" "0"
 256   # Since GCC 4.3, -Wconversion has changed its meanings to warn these implicit
 257   # conversions which might affect the values. Only enable it in earlier versions.
 258   WARNING_FLAGS = -Wunused-function
 259   ifeq ($(USE_CLANG),)
 260     WARNINGS_FLAGS += -Wconversion
 261   endif
 262 endif
 263 
 264 CFLAGS_WARN/DEFAULT = $(WARNINGS_ARE_ERRORS) $(WARNING_FLAGS)
 265 # Special cases
 266 CFLAGS_WARN/BYFILE = $(CFLAGS_WARN/$@)$(CFLAGS_WARN/DEFAULT$(CFLAGS_WARN/$@)) 
 267 # XXXDARWIN: for _dyld_bind_fully_image_containing_address
 268 ifeq ($(OS_VENDOR), Darwin)
 269   CFLAGS_WARN/os_bsd.o = $(CFLAGS_WARN/DEFAULT) -Wno-deprecated-declarations
 270 endif
 271 
 272 OPT_CFLAGS/SIZE=-Os
 273 OPT_CFLAGS/SPEED=-O3
 274 
 275 # Hotspot uses very unstrict aliasing turn this optimization off
 276 # This option is added to CFLAGS rather than OPT_CFLAGS
 277 # so that OPT_CFLAGS overrides get this option too.
 278 CFLAGS += -fno-strict-aliasing
 279 
 280 # The flags to use for an Optimized g++ build
 281 ifeq ($(OS_VENDOR), Darwin)
 282   # use -Os by default, unless -O3 can be proved to be worth the cost, as per policy
 283   # <http://wikis.sun.com/display/OpenJDK/Mac+OS+X+Port+Compilers>
 284   OPT_CFLAGS_DEFAULT ?= SIZE
 285 else
 286   OPT_CFLAGS_DEFAULT ?= SPEED
 287 endif
 288 
 289 ifdef OPT_CFLAGS
 290   ifneq ("$(origin OPT_CFLAGS)", "command line")
 291     $(error " Use OPT_EXTRAS instead of OPT_CFLAGS to add extra flags to OPT_CFLAGS.")
 292   endif
 293 endif
 294 
 295 OPT_CFLAGS = $(OPT_CFLAGS/$(OPT_CFLAGS_DEFAULT)) $(OPT_EXTRAS)
 296 
 297 # The gcc compiler segv's on ia64 when compiling bytecodeInterpreter.cpp
 298 # if we use expensive-optimizations
 299 ifeq ($(BUILDARCH), ia64)
 300 OPT_CFLAGS += -fno-expensive-optimizations
 301 endif
 302 
 303 OPT_CFLAGS/NOOPT=-O0
 304 
 305 # Work around some compiler bugs.
 306 ifeq ($(USE_CLANG), true)
 307   ifeq ($(shell expr $(CC_VER_MAJOR) = 4 \& $(CC_VER_MINOR) = 2), 1)
 308     OPT_CFLAGS/loopTransform.o += $(OPT_CFLAGS/NOOPT)
 309   endif
 310 else
 311   # 6835796. Problem in GCC 4.3.0 with mulnode.o optimized compilation.
 312   ifeq ($(shell expr $(CC_VER_MAJOR) = 4 \& $(CC_VER_MINOR) = 3), 1)
 313     OPT_CFLAGS/mulnode.o += $(OPT_CFLAGS/NOOPT)
 314   endif
 315 endif
 316 
 317 # Flags for generating make dependency flags.
 318 DEPFLAGS = -MMD -MP -MF $(DEP_DIR)/$(@:%=%.d)
 319 ifeq ($(USE_CLANG),)
 320   ifneq ($(CC_VER_MAJOR), 2)
 321     DEPFLAGS += -fpch-deps
 322   endif
 323 endif
 324 
 325 # -DDONT_USE_PRECOMPILED_HEADER will exclude all includes in precompiled.hpp.
 326 ifeq ($(USE_PRECOMPILED_HEADER),0)
 327 CFLAGS += -DDONT_USE_PRECOMPILED_HEADER
 328 endif
 329 
 330 ifeq ($(OS_VENDOR), Darwin)
 331   # Setting these parameters makes it an error to link to macosx APIs that are 
 332   # newer than the given OS version and makes the linked binaries compatible even
 333   # if built on a newer version of the OS.
 334   # The expected format is X.Y.Z
 335   ifeq ($(MACOSX_VERSION_MIN),)
 336     MACOSX_VERSION_MIN=10.7.0
 337   endif
 338   # The macro takes the version with no dots, ex: 1070
 339   CFLAGS += -DMAC_OS_X_VERSION_MAX_ALLOWED=$(subst .,,$(MACOSX_VERSION_MIN)) \
 340             -mmacosx-version-min=$(MACOSX_VERSION_MIN)
 341   LDFLAGS += -mmacosx-version-min=$(MACOSX_VERSION_MIN)
 342 endif
 343 
 344 #------------------------------------------------------------------------
 345 # Linker flags
 346 
 347 # statically link libstdc++.so, work with gcc but ignored by g++
 348 STATIC_STDCXX = -Wl,-Bstatic -lstdc++ -Wl,-Bdynamic
 349 
 350 ifeq ($(USE_CLANG),)
 351   # statically link libgcc and/or libgcc_s, libgcc does not exist before gcc-3.x.
 352   ifneq ("${CC_VER_MAJOR}", "2")
 353     STATIC_LIBGCC += -static-libgcc
 354   endif
 355 
 356   ifeq ($(BUILDARCH), ia64)
 357     LFLAGS += -Wl,-relax
 358   endif
 359 endif
 360 
 361 # Use $(MAPFLAG:FILENAME=real_file_name) to specify a map file.
 362 MAPFLAG = -Xlinker --version-script=FILENAME
 363 
 364 #
 365 # Shared Library
 366 #
 367 ifeq ($(OS_VENDOR), Darwin)
 368   # Standard linker flags
 369   LFLAGS +=
 370 
 371   # The apple linker has its own variant of mapfiles/version-scripts
 372   MAPFLAG = -Xlinker -exported_symbols_list -Xlinker FILENAME
 373 
 374   # Use $(SONAMEFLAG:SONAME=soname) to specify the intrinsic name of a shared obj
 375   SONAMEFLAG =
 376 
 377   # Build shared library
 378   SHARED_FLAG = -Wl,-install_name,@rpath/$(@F) -dynamiclib -compatibility_version 1.0.0 -current_version 1.0.0 $(VM_PICFLAG)
 379 
 380   # Keep symbols even they are not used
 381   #AOUT_FLAGS += -Xlinker -export-dynamic
 382 else
 383   # Enable linker optimization
 384   LFLAGS += -Xlinker -O1
 385 
 386   # Use $(SONAMEFLAG:SONAME=soname) to specify the intrinsic name of a shared obj
 387   SONAMEFLAG = -Xlinker -soname=SONAME
 388 
 389   # Build shared library
 390   SHARED_FLAG = -shared $(VM_PICFLAG)
 391 
 392   # Keep symbols even they are not used
 393   AOUT_FLAGS += -Xlinker -export-dynamic
 394 endif
 395 
 396 #------------------------------------------------------------------------
 397 # Debug flags
 398 
 399 ifeq ($(USE_CLANG), true)
 400   # Restrict the debug information created by Clang to avoid
 401   # too big object files and speed the build up a little bit
 402   # (see http://llvm.org/bugs/show_bug.cgi?id=7554)
 403   CFLAGS += -flimit-debug-info
 404 endif
 405 
 406 # DEBUG_BINARIES uses full -g debug information for all configs
 407 ifeq ($(DEBUG_BINARIES), true)
 408   CFLAGS += -g
 409 else
 410   # Use the stabs format for debugging information (this is the default
 411   # on gcc-2.91). It's good enough, has all the information about line
 412   # numbers and local variables, and libjvm.so is only about 16M.
 413   # Change this back to "-g" if you want the most expressive format.
 414   # (warning: that could easily inflate libjvm.so to 150M!)
 415   # Note: The Itanium gcc compiler crashes when using -gstabs.
 416   DEBUG_CFLAGS/ia64  = -g
 417   DEBUG_CFLAGS/amd64 = -g
 418   DEBUG_CFLAGS/arm   = -g
 419   DEBUG_CFLAGS/ppc   = -g
 420   DEBUG_CFLAGS += $(DEBUG_CFLAGS/$(BUILDARCH))
 421   ifeq ($(DEBUG_CFLAGS/$(BUILDARCH)),)
 422   DEBUG_CFLAGS += -gstabs
 423   endif
 424 endif
 425 
 426 # If we are building HEADLESS, pass on to VM
 427 # so it can set the java.awt.headless property
 428 ifdef HEADLESS
 429 CFLAGS += -DHEADLESS
 430 endif
 431 
 432 # We are building Embedded for a small device
 433 # favor code space over speed
 434 ifdef MINIMIZE_RAM_USAGE
 435 CFLAGS += -DMINIMIZE_RAM_USAGE
 436 endif