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 # The following files are compiled at various optimization
134 # levels due to optimization issues encountered at the
135 # 'OPT_CFLAGS_DEFAULT' level. The Clang compiler issues a compile
136 # time error if there is an optimization level specification
137 # skew between the PCH file and the C++ file. Especially if the
138 # PCH file is compiled at a higher optimization level than
139 # the C++ file. One solution might be to prepare extra optimization
140 # level specific PCH files for the opt build and use them here, but
141 # it's probably not worth the effort as long as only a few files
142 # need this special handling.
143 PCH_FLAG/loopTransform.o = $(PCH_FLAG/NO_PCH)
144 PCH_FLAG/sharedRuntimeTrig.o = $(PCH_FLAG/NO_PCH)
145 PCH_FLAG/sharedRuntimeTrans.o = $(PCH_FLAG/NO_PCH)
146 PCH_FLAG/unsafe.o = $(PCH_FLAG/NO_PCH)
147
148 endif
149 else # ($(USE_CLANG), true)
150 # check for precompiled headers support
151 ifneq "$(shell expr \( $(CC_VER_MAJOR) \> 3 \) \| \( \( $(CC_VER_MAJOR) = 3 \) \& \( $(CC_VER_MINOR) \>= 4 \) \))" "0"
152 # Allow the user to turn off precompiled headers from the command line.
153 ifneq ($(USE_PRECOMPILED_HEADER),0)
154 PRECOMPILED_HEADER_DIR=.
155 PRECOMPILED_HEADER_SRC=$(GAMMADIR)/src/share/vm/precompiled/precompiled.hpp
156 PRECOMPILED_HEADER=$(PRECOMPILED_HEADER_DIR)/precompiled.hpp.gch
157 endif
158 endif
159 endif
160
161 # -DDONT_USE_PRECOMPILED_HEADER will exclude all includes in precompiled.hpp.
162 ifeq ($(USE_PRECOMPILED_HEADER),0)
163 CFLAGS += -DDONT_USE_PRECOMPILED_HEADER
164 endif
165
166 #------------------------------------------------------------------------
167 # Compiler flags
168
169 # position-independent code
170 PICFLAG = -fPIC
171
172 VM_PICFLAG/LIBJVM = $(PICFLAG)
173 VM_PICFLAG/AOUT =
174 VM_PICFLAG = $(VM_PICFLAG/$(LINK_INTO))
175
176 ifeq ($(JVM_VARIANT_ZERO), true)
177 CFLAGS += $(LIBFFI_CFLAGS)
178 endif
179 ifeq ($(JVM_VARIANT_ZEROSHARK), true)
180 CFLAGS += $(LIBFFI_CFLAGS)
181 CFLAGS += $(LLVM_CFLAGS)
182 endif
183 CFLAGS += $(VM_PICFLAG)
184 CFLAGS += -fno-rtti
185 CFLAGS += -fno-exceptions
186 ifeq ($(USE_CLANG),)
187 CFLAGS += -pthread
188 CFLAGS += -fcheck-new
189 # version 4 and above support fvisibility=hidden (matches jni_x86.h file)
190 # except 4.1.2 gives pointless warnings that can't be disabled (afaik)
191 ifneq "$(shell expr \( $(CC_VER_MAJOR) \> 4 \) \| \( \( $(CC_VER_MAJOR) = 4 \) \& \( $(CC_VER_MINOR) \>= 3 \) \))" "0"
192 CFLAGS += -fvisibility=hidden
193 endif
194 else
195 CFLAGS += -fvisibility=hidden
196 endif
197
198 ifeq ($(USE_CLANG), true)
199 # Before Clang 3.1, we had to pass the stack alignment specification directly to llvm with the help of '-mllvm'
200 # Starting with version 3.1, Clang understands the '-mstack-alignment' (and rejects '-mllvm -stack-alignment')
201 ifneq "$(shell expr \( $(CC_VER_MAJOR) \> 3 \) \| \( \( $(CC_VER_MAJOR) = 3 \) \& \( $(CC_VER_MINOR) \>= 1 \) \))" "0"
202 STACK_ALIGNMENT_OPT = -mno-omit-leaf-frame-pointer -mstack-alignment=16
203 else
204 STACK_ALIGNMENT_OPT = -mno-omit-leaf-frame-pointer -mllvm -stack-alignment=16
205 endif
206 endif
207
208 ARCHFLAG = $(ARCHFLAG/$(BUILDARCH))
209 ARCHFLAG/i486 = -m32 -march=i586
210 ARCHFLAG/amd64 = -m64 $(STACK_ALIGNMENT_OPT)
211 ARCHFLAG/ia64 =
212 ARCHFLAG/sparc = -m32 -mcpu=v9
213 ARCHFLAG/sparcv9 = -m64 -mcpu=v9
214 ARCHFLAG/zero = $(ZERO_ARCHFLAG)
215
216 # Darwin-specific build flags
217 ifeq ($(OS_VENDOR), Darwin)
218 # Ineffecient 16-byte stack re-alignment on Darwin/IA32
219 ARCHFLAG/i486 += -mstackrealign
220 endif
221
222 CFLAGS += $(ARCHFLAG)
223 AOUT_FLAGS += $(ARCHFLAG)
224 LFLAGS += $(ARCHFLAG)
225 ASFLAGS += $(ARCHFLAG)
226
227 ifdef E500V2
228 CFLAGS += -DE500V2
229 endif
230
231 # Use C++ Interpreter
232 ifdef CC_INTERP
233 CFLAGS += -DCC_INTERP
234 endif
235
236 # Keep temporary files (.ii, .s)
237 ifdef NEED_ASM
238 CFLAGS += -save-temps
239 else
240 CFLAGS += -pipe
241 endif
242
243 # Compiler warnings are treated as errors
244 ifneq ($(COMPILER_WARNINGS_FATAL),false)
245 WARNINGS_ARE_ERRORS = -Werror
246 endif
247
248 ifeq ($(USE_CLANG), true)
249 # However we need to clean the code up before we can unrestrictedly enable this option with Clang
250 WARNINGS_ARE_ERRORS += -Wno-unused-value -Wno-logical-op-parentheses -Wno-parentheses-equality -Wno-parentheses
251 WARNINGS_ARE_ERRORS += -Wno-switch -Wno-tautological-compare
252 # Not yet supported by clang in Xcode 4.6.2
253 # WARNINGS_ARE_ERRORS += -Wno-tautological-constant-out-of-range-compare
254 WARNINGS_ARE_ERRORS += -Wno-delete-non-virtual-dtor -Wno-deprecated -Wno-format -Wno-dynamic-class-memaccess
255 WARNINGS_ARE_ERRORS += -Wno-empty-body
256 endif
257
258 WARNING_FLAGS = -Wpointer-arith -Wsign-compare -Wundef
259
260 ifeq "$(shell expr \( $(CC_VER_MAJOR) \> 4 \) \| \( \( $(CC_VER_MAJOR) = 4 \) \& \( $(CC_VER_MINOR) \>= 3 \) \))" "0"
261 # Since GCC 4.3, -Wconversion has changed its meanings to warn these implicit
262 # conversions which might affect the values. Only enable it in earlier versions.
263 WARNING_FLAGS = -Wunused-function
264 ifeq ($(USE_CLANG),)
265 WARNINGS_FLAGS += -Wconversion
266 endif
267 endif
268
269 CFLAGS_WARN/DEFAULT = $(WARNINGS_ARE_ERRORS) $(WARNING_FLAGS)
270 # Special cases
271 CFLAGS_WARN/BYFILE = $(CFLAGS_WARN/$@)$(CFLAGS_WARN/DEFAULT$(CFLAGS_WARN/$@))
272 # XXXDARWIN: for _dyld_bind_fully_image_containing_address
273 ifeq ($(OS_VENDOR), Darwin)
274 CFLAGS_WARN/os_bsd.o = $(CFLAGS_WARN/DEFAULT) -Wno-deprecated-declarations
275 endif
276
277 OPT_CFLAGS/SIZE=-Os
278 OPT_CFLAGS/SPEED=-O3
279
280 # Hotspot uses very unstrict aliasing turn this optimization off
281 # This option is added to CFLAGS rather than OPT_CFLAGS
282 # so that OPT_CFLAGS overrides get this option too.
283 CFLAGS += -fno-strict-aliasing
284
285 # The flags to use for an Optimized g++ build
286 ifeq ($(OS_VENDOR), Darwin)
287 # use -Os by default, unless -O3 can be proved to be worth the cost, as per policy
288 # <http://wikis.sun.com/display/OpenJDK/Mac+OS+X+Port+Compilers>
289 OPT_CFLAGS_DEFAULT ?= SIZE
290 else
291 OPT_CFLAGS_DEFAULT ?= SPEED
292 endif
293
294 ifdef OPT_CFLAGS
295 ifneq ("$(origin OPT_CFLAGS)", "command line")
296 $(error " Use OPT_EXTRAS instead of OPT_CFLAGS to add extra flags to OPT_CFLAGS.")
297 endif
298 endif
299
300 OPT_CFLAGS = $(OPT_CFLAGS/$(OPT_CFLAGS_DEFAULT)) $(OPT_EXTRAS)
301
302 # The gcc compiler segv's on ia64 when compiling bytecodeInterpreter.cpp
303 # if we use expensive-optimizations
304 ifeq ($(BUILDARCH), ia64)
305 OPT_CFLAGS += -fno-expensive-optimizations
306 endif
307
308 OPT_CFLAGS/NOOPT=-O0
309
310 # Work around some compiler bugs.
311 ifeq ($(USE_CLANG), true)
312 ifeq ($(shell expr $(CC_VER_MAJOR) = 4 \& $(CC_VER_MINOR) = 2), 1)
313 OPT_CFLAGS/loopTransform.o += $(OPT_CFLAGS/NOOPT)
314 OPT_CFLAGS/unsafe.o += -O1
315 endif
316 else
317 # 6835796. Problem in GCC 4.3.0 with mulnode.o optimized compilation.
318 ifeq ($(shell expr $(CC_VER_MAJOR) = 4 \& $(CC_VER_MINOR) = 3), 1)
319 OPT_CFLAGS/mulnode.o += $(OPT_CFLAGS/NOOPT)
320 endif
321 endif
322
323 # Flags for generating make dependency flags.
324 DEPFLAGS = -MMD -MP -MF $(DEP_DIR)/$(@:%=%.d)
325 ifeq ($(USE_CLANG),)
326 ifneq ($(CC_VER_MAJOR), 2)
327 DEPFLAGS += -fpch-deps
328 endif
329 endif
330
331 # -DDONT_USE_PRECOMPILED_HEADER will exclude all includes in precompiled.hpp.
332 ifeq ($(USE_PRECOMPILED_HEADER),0)
333 CFLAGS += -DDONT_USE_PRECOMPILED_HEADER
334 endif
335
336 ifeq ($(OS_VENDOR), Darwin)
337 # Setting these parameters makes it an error to link to macosx APIs that are
338 # newer than the given OS version and makes the linked binaries compatible even
339 # if built on a newer version of the OS.
340 # The expected format is X.Y.Z
341 ifeq ($(MACOSX_VERSION_MIN),)
342 MACOSX_VERSION_MIN=10.7.0
343 endif
344 # The macro takes the version with no dots, ex: 1070
345 CFLAGS += -DMAC_OS_X_VERSION_MAX_ALLOWED=$(subst .,,$(MACOSX_VERSION_MIN)) \
346 -mmacosx-version-min=$(MACOSX_VERSION_MIN)
347 LDFLAGS += -mmacosx-version-min=$(MACOSX_VERSION_MIN)
348 endif
349
350 #------------------------------------------------------------------------
351 # Linker flags
352
353 # statically link libstdc++.so, work with gcc but ignored by g++
354 STATIC_STDCXX = -Wl,-Bstatic -lstdc++ -Wl,-Bdynamic
355
356 ifeq ($(USE_CLANG),)
357 # statically link libgcc and/or libgcc_s, libgcc does not exist before gcc-3.x.
358 ifneq ("${CC_VER_MAJOR}", "2")
359 STATIC_LIBGCC += -static-libgcc
360 endif
361
362 ifeq ($(BUILDARCH), ia64)
363 LFLAGS += -Wl,-relax
364 endif
365 endif
366
367 # Use $(MAPFLAG:FILENAME=real_file_name) to specify a map file.
368 MAPFLAG = -Xlinker --version-script=FILENAME
369
370 #
371 # Shared Library
372 #
373 ifeq ($(OS_VENDOR), Darwin)
374 # Standard linker flags
375 LFLAGS +=
376
377 # The apple linker has its own variant of mapfiles/version-scripts
378 MAPFLAG = -Xlinker -exported_symbols_list -Xlinker FILENAME
379
380 # Use $(SONAMEFLAG:SONAME=soname) to specify the intrinsic name of a shared obj
381 SONAMEFLAG =
382
383 # Build shared library
384 SHARED_FLAG = -Wl,-install_name,@rpath/$(@F) -dynamiclib -compatibility_version 1.0.0 -current_version 1.0.0 $(VM_PICFLAG)
385
386 # Keep symbols even they are not used
387 #AOUT_FLAGS += -Xlinker -export-dynamic
388 else
389 # Enable linker optimization
390 LFLAGS += -Xlinker -O1
391
392 # Use $(SONAMEFLAG:SONAME=soname) to specify the intrinsic name of a shared obj
393 SONAMEFLAG = -Xlinker -soname=SONAME
394
395 # Build shared library
396 SHARED_FLAG = -shared $(VM_PICFLAG)
397
398 # Keep symbols even they are not used
399 AOUT_FLAGS += -Xlinker -export-dynamic
400 endif
401
402 #------------------------------------------------------------------------
403 # Debug flags
404
405 ifeq ($(USE_CLANG), true)
406 # Restrict the debug information created by Clang to avoid
407 # too big object files and speed the build up a little bit
408 # (see http://llvm.org/bugs/show_bug.cgi?id=7554)
409 CFLAGS += -flimit-debug-info
410 endif
411
412 # DEBUG_BINARIES uses full -g debug information for all configs
413 ifeq ($(DEBUG_BINARIES), true)
414 CFLAGS += -g
415 else
416 # Use the stabs format for debugging information (this is the default
417 # on gcc-2.91). It's good enough, has all the information about line
418 # numbers and local variables, and libjvm.so is only about 16M.
419 # Change this back to "-g" if you want the most expressive format.
420 # (warning: that could easily inflate libjvm.so to 150M!)
421 # Note: The Itanium gcc compiler crashes when using -gstabs.
422 DEBUG_CFLAGS/ia64 = -g
423 DEBUG_CFLAGS/amd64 = -g
424 DEBUG_CFLAGS/arm = -g
425 DEBUG_CFLAGS/ppc = -g
426 DEBUG_CFLAGS += $(DEBUG_CFLAGS/$(BUILDARCH))
427 ifeq ($(DEBUG_CFLAGS/$(BUILDARCH)),)
428 DEBUG_CFLAGS += -gstabs
429 endif
430 endif
431
432 # If we are building HEADLESS, pass on to VM
433 # so it can set the java.awt.headless property
434 ifdef HEADLESS
435 CFLAGS += -DHEADLESS
436 endif
437
438 # We are building Embedded for a small device
439 # favor code space over speed
440 ifdef MINIMIZE_RAM_USAGE
441 CFLAGS += -DMINIMIZE_RAM_USAGE
442 endif