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=2 218 219 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 endif 225 endif 226 227 CFLAGS_WARN/DEFAULT = $(WARNINGS_ARE_ERRORS) $(WARNING_FLAGS) 228 229 # Special cases 230 CFLAGS_WARN/BYFILE = $(CFLAGS_WARN/$@)$(CFLAGS_WARN/DEFAULT$(CFLAGS_WARN/$@)) 231 232 # optimization control flags (Used by fastdebug and release variants) 233 OPT_CFLAGS/NOOPT=-O0 234 OPT_CFLAGS/DEBUG=-O0 235 OPT_CFLAGS/SIZE=-Os 236 OPT_CFLAGS/SPEED=-O3 237 238 OPT_CFLAGS_DEFAULT ?= SPEED 239 240 # Hotspot uses very unstrict aliasing turn this optimization off 241 # This option is added to CFLAGS rather than OPT_CFLAGS 242 # so that OPT_CFLAGS overrides get this option too. 243 CFLAGS += -fno-strict-aliasing 244 245 ifdef OPT_CFLAGS 246 ifneq ("$(origin OPT_CFLAGS)", "command line") 247 $(error " Use OPT_EXTRAS instead of OPT_CFLAGS to add extra flags to OPT_CFLAGS.") 248 endif 249 endif 250 251 OPT_CFLAGS = $(OPT_CFLAGS/$(OPT_CFLAGS_DEFAULT)) $(OPT_EXTRAS) 252 253 # The gcc compiler segv's on ia64 when compiling bytecodeInterpreter.cpp 254 # if we use expensive-optimizations 255 ifeq ($(BUILDARCH), ia64) 256 OPT_CFLAGS += -fno-expensive-optimizations 257 endif 258 259 # Work around some compiler bugs. 260 ifeq ($(USE_CLANG), true) 261 ifeq ($(shell expr $(CC_VER_MAJOR) = 4 \& $(CC_VER_MINOR) = 2), 1) 262 OPT_CFLAGS/loopTransform.o += $(OPT_CFLAGS/NOOPT) 263 endif 264 else 265 # 6835796. Problem in GCC 4.3.0 with mulnode.o optimized compilation. 266 ifeq ($(shell expr $(CC_VER_MAJOR) = 4 \& $(CC_VER_MINOR) = 3), 1) 267 OPT_CFLAGS/mulnode.o += $(OPT_CFLAGS/NOOPT) 268 endif 269 endif 270 271 # Flags for generating make dependency flags. 272 DEPFLAGS = -MMD -MP -MF $(DEP_DIR)/$(@:%=%.d) 273 ifeq ($(USE_CLANG),) 274 ifneq ($(CC_VER_MAJOR), 2) 275 DEPFLAGS += -fpch-deps 276 endif 277 endif 278 279 #------------------------------------------------------------------------ 280 # Linker flags 281 282 # statically link libstdc++.so, work with gcc but ignored by g++ 283 STATIC_STDCXX = -Wl,-Bstatic -lstdc++ -Wl,-Bdynamic 284 285 # Enable linker optimization 286 LFLAGS += -Xlinker -O1 287 288 ifeq ($(USE_CLANG),) 289 STATIC_LIBGCC += -static-libgcc 290 291 ifneq (, findstring(debug,$(BUILD_FLAVOR))) 292 # for relocations read-only 293 LFLAGS += -Xlinker -z -Xlinker relro 294 295 ifeq ($(BUILD_FLAVOR), debug) 296 # disable incremental relocations linking 297 LFLAGS += -Xlinker -z -Xlinker now 298 endif 299 endif 300 301 ifeq ($(BUILDARCH), ia64) 302 LFLAGS += -Wl,-relax 303 endif 304 305 # If this is a --hash-style=gnu system, use --hash-style=both 306 # The gnu .hash section won't work on some Linux systems like SuSE 10. 307 _HAS_HASH_STYLE_GNU:=$(shell $(CC) -dumpspecs | grep -- '--hash-style=gnu') 308 ifneq ($(_HAS_HASH_STYLE_GNU),) 309 LDFLAGS_HASH_STYLE = -Wl,--hash-style=both 310 endif 311 else 312 # Don't know how to find out the 'hash style' of a system as '-dumpspecs' 313 # doesn't work for Clang. So for now we'll alwys use --hash-style=both 314 LDFLAGS_HASH_STYLE = -Wl,--hash-style=both 315 endif 316 317 LFLAGS += $(LDFLAGS_HASH_STYLE) 318 319 # Use $(MAPFLAG:FILENAME=real_file_name) to specify a map file. 320 MAPFLAG = -Xlinker --version-script=FILENAME 321 322 # Use $(SONAMEFLAG:SONAME=soname) to specify the intrinsic name of a shared obj 323 SONAMEFLAG = -Xlinker -soname=SONAME 324 325 # Build shared library 326 SHARED_FLAG = -shared 327 328 # Keep symbols even they are not used 329 AOUT_FLAGS += -Xlinker -export-dynamic 330 331 #------------------------------------------------------------------------ 332 # Debug flags 333 334 ifeq ($(USE_CLANG), true) 335 # Restrict the debug information created by Clang to avoid 336 # too big object files and speed the build up a little bit 337 # (see http://llvm.org/bugs/show_bug.cgi?id=7554) 338 CFLAGS += -flimit-debug-info 339 endif 340 341 # Allow no optimizations. 342 DEBUG_CFLAGS=-O0 343 344 # DEBUG_BINARIES uses full -g debug information for all configs 345 ifeq ($(DEBUG_BINARIES), true) 346 CFLAGS += -g 347 else 348 DEBUG_CFLAGS += $(DEBUG_CFLAGS/$(BUILDARCH)) 349 ifeq ($(DEBUG_CFLAGS/$(BUILDARCH)),) 350 DEBUG_CFLAGS += -g 351 endif 352 353 ifeq ($(ENABLE_FULL_DEBUG_SYMBOLS),1) 354 FASTDEBUG_CFLAGS += $(FASTDEBUG_CFLAGS/$(BUILDARCH)) 355 ifeq ($(FASTDEBUG_CFLAGS/$(BUILDARCH)),) 356 FASTDEBUG_CFLAGS += -g 357 endif 358 359 OPT_CFLAGS += $(OPT_CFLAGS/$(BUILDARCH)) 360 ifeq ($(OPT_CFLAGS/$(BUILDARCH)),) 361 OPT_CFLAGS += -g 362 endif 363 endif 364 endif 365 366 ifeq ($(USE_CLANG),) 367 # Enable bounds checking. 368 ifeq "$(shell expr \( $(CC_VER_MAJOR) \> 3 \) )" "1" 369 # stack smashing checks. 370 DEBUG_CFLAGS += -fstack-protector-all --param ssp-buffer-size=1 371 endif 372 endif 373 374 375 # If we are building HEADLESS, pass on to VM 376 # so it can set the java.awt.headless property 377 ifdef HEADLESS 378 CFLAGS += -DHEADLESS 379 endif 380 381 # We are building Embedded for a small device 382 # favor code space over speed 383 ifdef MINIMIZE_RAM_USAGE 384 CFLAGS += -DMINIMIZE_RAM_USAGE 385 endif 386 387 # Stack walking in the JVM relies on frame pointer (%rbp) to walk thread stack. 388 # Explicitly specify -fno-omit-frame-pointer because it is off by default 389 # starting with gcc 4.6. 390 ifndef USE_SUNCC 391 CFLAGS += -fno-omit-frame-pointer 392 endif