1 #
2 # Copyright (c) 1999, 2015, 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 = $(CC) -c
84 endif
85
86 ifeq ($(OS_VENDOR), Darwin)
87 ifeq ($(DSYMUTIL),)
88 DSYMUTIL=dsymutil
89 endif
90 endif
91
92 ifeq ($(USE_CLANG), true)
93 CC_VER_MAJOR := $(shell $(CC) -v 2>&1 | grep version | sed "s/.*version \([0-9]*\.[0-9]*\).*/\1/" | cut -d'.' -f1)
94 CC_VER_MINOR := $(shell $(CC) -v 2>&1 | grep version | sed "s/.*version \([0-9]*\.[0-9]*\).*/\1/" | cut -d'.' -f2)
95 else
96 # -dumpversion in gcc-2.91 shows "egcs-2.91.66". In later version, it only
97 # prints the numbers (e.g. "2.95", "3.2.1")
98 CC_VER_MAJOR := $(shell $(CC) -dumpversion | sed 's/egcs-//' | cut -d'.' -f1)
99 CC_VER_MINOR := $(shell $(CC) -dumpversion | sed 's/egcs-//' | cut -d'.' -f2)
100 endif
101
102 ifeq ($(USE_CLANG), true)
103 # Clang has precompiled headers support by default, but the user can switch
104 # it off by using 'USE_PRECOMPILED_HEADER=0'.
105 ifdef LP64
106 ifeq ($(USE_PRECOMPILED_HEADER),)
107 USE_PRECOMPILED_HEADER=1
108 endif
109 else
110 # We don't support precompiled headers on 32-bit builds because there some files are
111 # compiled with -fPIC while others are compiled without (see 'NONPIC_OBJ_FILES' rules.make)
112 # Clang produces an error if the PCH file was compiled with other options than the actual compilation unit.
113 USE_PRECOMPILED_HEADER=0
114 endif
115
116 ifeq ($(USE_PRECOMPILED_HEADER),1)
117
118 ifndef LP64
119 $(error " Precompiled Headers only supported on 64-bit platforms!")
120 endif
121
122 PRECOMPILED_HEADER_DIR=.
123 PRECOMPILED_HEADER_SRC=$(GAMMADIR)/src/share/vm/precompiled/precompiled.hpp
124 PRECOMPILED_HEADER=$(PRECOMPILED_HEADER_DIR)/precompiled.hpp.pch
125
126 PCH_FLAG = -include precompiled.hpp
127 PCH_FLAG/DEFAULT = $(PCH_FLAG)
128 PCH_FLAG/NO_PCH = -DNO_PCH
129 PCH_FLAG/BY_FILE = $(PCH_FLAG/$@)$(PCH_FLAG/DEFAULT$(PCH_FLAG/$@))
130
131 VM_PCH_FLAG/LIBJVM = $(PCH_FLAG/BY_FILE)
132 VM_PCH_FLAG/AOUT =
133 VM_PCH_FLAG = $(VM_PCH_FLAG/$(LINK_INTO))
134
135 # We only use precompiled headers for the JVM build
136 CFLAGS += $(VM_PCH_FLAG)
137
138 # The following files are compiled at various optimization
139 # levels due to optimization issues encountered at the
140 # 'OPT_CFLAGS_DEFAULT' level. The Clang compiler issues a compile
141 # time error if there is an optimization level specification
142 # skew between the PCH file and the C++ file. Especially if the
143 # PCH file is compiled at a higher optimization level than
144 # the C++ file. One solution might be to prepare extra optimization
145 # level specific PCH files for the opt build and use them here, but
146 # it's probably not worth the effort as long as only a few files
147 # need this special handling.
148 PCH_FLAG/loopTransform.o = $(PCH_FLAG/NO_PCH)
149 PCH_FLAG/sharedRuntimeTrig.o = $(PCH_FLAG/NO_PCH)
150 PCH_FLAG/sharedRuntimeTrans.o = $(PCH_FLAG/NO_PCH)
151 PCH_FLAG/unsafe.o = $(PCH_FLAG/NO_PCH)
152
153 endif
154 else # ($(USE_CLANG), true)
155 # check for precompiled headers support
156 ifneq "$(shell expr \( $(CC_VER_MAJOR) \> 3 \) \| \( \( $(CC_VER_MAJOR) = 3 \) \& \( $(CC_VER_MINOR) \>= 4 \) \))" "0"
157 # Allow the user to turn off precompiled headers from the command line.
158 ifneq ($(USE_PRECOMPILED_HEADER),0)
159 PRECOMPILED_HEADER_DIR=.
160 PRECOMPILED_HEADER_SRC=$(GAMMADIR)/src/share/vm/precompiled/precompiled.hpp
161 PRECOMPILED_HEADER=$(PRECOMPILED_HEADER_DIR)/precompiled.hpp.gch
162 endif
163 endif
164 endif
165
166 # -DDONT_USE_PRECOMPILED_HEADER will exclude all includes in precompiled.hpp.
167 ifeq ($(USE_PRECOMPILED_HEADER),0)
168 CFLAGS += -DDONT_USE_PRECOMPILED_HEADER
169 endif
170
171 #------------------------------------------------------------------------
172 # Compiler flags
173
174 # position-independent code
175 PICFLAG = -fPIC
176
177 VM_PICFLAG/LIBJVM = $(PICFLAG)
178 VM_PICFLAG/AOUT =
179 VM_PICFLAG = $(VM_PICFLAG/$(LINK_INTO))
180
181 ifeq ($(JVM_VARIANT_ZERO), true)
182 CFLAGS += $(LIBFFI_CFLAGS)
183 endif
184 ifeq ($(JVM_VARIANT_ZEROSHARK), true)
185 CFLAGS += $(LIBFFI_CFLAGS)
186 CFLAGS += $(LLVM_CFLAGS)
187 endif
188
189 ifeq ($(BUILD_STATIC),true)
190 CXXFLAGS += -DSTATIC_BUILD
191 CFLAGS += -DSTATIC_BUILD
192 else
193 CFLAGS += $(VM_PICFLAG)
194 endif
195
196 CFLAGS += -fno-rtti
197 CFLAGS += -fno-exceptions
198 ifeq ($(USE_CLANG),)
199 CFLAGS += -pthread
200 CFLAGS += -fcheck-new
201 # version 4 and above support fvisibility=hidden (matches jni_x86.h file)
202 # except 4.1.2 gives pointless warnings that can't be disabled (afaik)
203 ifneq "$(shell expr \( $(CC_VER_MAJOR) \> 4 \) \| \( \( $(CC_VER_MAJOR) = 4 \) \& \( $(CC_VER_MINOR) \>= 3 \) \))" "0"
204 CFLAGS += -fvisibility=hidden
205 endif
206 else
207 CFLAGS += -fvisibility=hidden
208 endif
209
210 ifeq ($(USE_CLANG), true)
211 # Before Clang 3.1, we had to pass the stack alignment specification directly to llvm with the help of '-mllvm'
212 # Starting with version 3.1, Clang understands the '-mstack-alignment' (and rejects '-mllvm -stack-alignment')
213 ifneq "$(shell expr \( $(CC_VER_MAJOR) \> 3 \) \| \( \( $(CC_VER_MAJOR) = 3 \) \& \( $(CC_VER_MINOR) \>= 1 \) \))" "0"
214 STACK_ALIGNMENT_OPT = -mno-omit-leaf-frame-pointer -mstack-alignment=16
215 else
216 STACK_ALIGNMENT_OPT = -mno-omit-leaf-frame-pointer -mllvm -stack-alignment=16
217 endif
218 endif
219
220 ARCHFLAG = $(ARCHFLAG/$(BUILDARCH))
221 ARCHFLAG/i486 = -m32 -march=i586
222 ARCHFLAG/amd64 = -m64 $(STACK_ALIGNMENT_OPT)
223 ARCHFLAG/ia64 =
224 ARCHFLAG/sparc = -m32 -mcpu=v9
225 ARCHFLAG/sparcv9 = -m64 -mcpu=v9
226 ARCHFLAG/zero = $(ZERO_ARCHFLAG)
227
228 # Darwin-specific build flags
229 ifeq ($(OS_VENDOR), Darwin)
230 # Ineffecient 16-byte stack re-alignment on Darwin/IA32
231 ARCHFLAG/i486 += -mstackrealign
232 endif
233
234 CFLAGS += $(ARCHFLAG)
235 AOUT_FLAGS += $(ARCHFLAG)
236 LFLAGS += $(ARCHFLAG)
237 ASFLAGS += $(ARCHFLAG)
238
239 ifdef E500V2
240 CFLAGS += -DE500V2
241 endif
242
243 # Use C++ Interpreter
244 ifdef CC_INTERP
245 CFLAGS += -DCC_INTERP
246 endif
247
248 # Keep temporary files (.ii, .s)
249 ifdef NEED_ASM
250 CFLAGS += -save-temps
251 else
252 CFLAGS += -pipe
253 endif
254
255 # Compiler warnings are treated as errors
256 ifneq ($(COMPILER_WARNINGS_FATAL),false)
257 WARNINGS_ARE_ERRORS = -Werror
258 endif
259
260 ifeq ($(USE_CLANG), true)
261 # However we need to clean the code up before we can unrestrictedly enable this option with Clang
262 WARNINGS_ARE_ERRORS += -Wno-logical-op-parentheses -Wno-parentheses-equality -Wno-parentheses
263 WARNINGS_ARE_ERRORS += -Wno-switch -Wno-tautological-compare
264 # Not yet supported by clang in Xcode 4.6.2
265 # WARNINGS_ARE_ERRORS += -Wno-tautological-constant-out-of-range-compare
266 WARNINGS_ARE_ERRORS += -Wno-delete-non-virtual-dtor -Wno-deprecated -Wno-format -Wno-dynamic-class-memaccess
267 WARNINGS_ARE_ERRORS += -Wno-empty-body
268 endif
269
270 WARNING_FLAGS = -Wpointer-arith -Wsign-compare -Wundef -Wunused-function -Wformat=2
271
272 ifeq ($(USE_CLANG),)
273 # Since GCC 4.3, -Wconversion has changed its meanings to warn these implicit
274 # conversions which might affect the values. Only enable it in earlier versions.
275 ifeq "$(shell expr \( $(CC_VER_MAJOR) \> 4 \) \| \( \( $(CC_VER_MAJOR) = 4 \) \& \( $(CC_VER_MINOR) \>= 3 \) \))" "0"
276 WARNINGS_FLAGS += -Wconversion
277 endif
278 endif
279
280 CFLAGS_WARN/DEFAULT = $(WARNINGS_ARE_ERRORS) $(WARNING_FLAGS)
281 # Special cases
282 CFLAGS_WARN/BYFILE = $(CFLAGS_WARN/$@)$(CFLAGS_WARN/DEFAULT$(CFLAGS_WARN/$@))
283 # XXXDARWIN: for _dyld_bind_fully_image_containing_address
284 ifeq ($(OS_VENDOR), Darwin)
285 CFLAGS_WARN/os_bsd.o = $(CFLAGS_WARN/DEFAULT) -Wno-deprecated-declarations
286 endif
287
288 # optimization control flags (Used by fastdebug and release variants)
289 OPT_CFLAGS/NOOPT=-O0
290 OPT_CFLAGS/DEBUG=-O0
291 OPT_CFLAGS/SIZE=-Os
292 OPT_CFLAGS/SPEED=-O3
293
294 ifeq ($(OS_VENDOR), Darwin)
295 # use -Os by default, unless -O3 can be proved to be worth the cost, as per policy
296 # <https://wiki.openjdk.java.net/display/MacOSXPort/Compiler+Errata>
297 OPT_CFLAGS_DEFAULT ?= SIZE
298 else
299 OPT_CFLAGS_DEFAULT ?= SPEED
300 endif
301
302 # Hotspot uses very unstrict aliasing turn this optimization off
303 # This option is added to CFLAGS rather than OPT_CFLAGS
304 # so that OPT_CFLAGS overrides get this option too.
305 CFLAGS += -fno-strict-aliasing
306
307 ifdef OPT_CFLAGS
308 ifneq ("$(origin OPT_CFLAGS)", "command line")
309 $(error " Use OPT_EXTRAS instead of OPT_CFLAGS to add extra flags to OPT_CFLAGS.")
310 endif
311 endif
312
313 OPT_CFLAGS = $(OPT_CFLAGS/$(OPT_CFLAGS_DEFAULT)) $(OPT_EXTRAS)
314
315 # The gcc compiler segv's on ia64 when compiling bytecodeInterpreter.cpp
316 # if we use expensive-optimizations
317 ifeq ($(BUILDARCH), ia64)
318 OPT_CFLAGS += -fno-expensive-optimizations
319 endif
320
321 # Work around some compiler bugs.
322 ifeq ($(USE_CLANG), true)
323 # Clang <= 6.1
324 ifeq ($(shell expr \
325 $(CC_VER_MAJOR) \< 6 \| \
326 \( $(CC_VER_MAJOR) = 6 \& $(CC_VER_MINOR) \<= 1 \) \
327 ), 1)
328 OPT_CFLAGS/loopTransform.o += $(OPT_CFLAGS/NOOPT)
329 OPT_CFLAGS/unsafe.o += -O1
330 else
331 $(error "Update compiler workarounds for Clang $(CC_VER_MAJOR).$(CC_VER_MINOR)")
332 endif
333 else
334 # 6835796. Problem in GCC 4.3.0 with mulnode.o optimized compilation.
335 ifeq ($(shell expr $(CC_VER_MAJOR) = 4 \& $(CC_VER_MINOR) = 3), 1)
336 OPT_CFLAGS/mulnode.o += $(OPT_CFLAGS/NOOPT)
337 endif
338 endif
339
340 # Flags for generating make dependency flags.
341 DEPFLAGS = -MMD -MP -MF $(DEP_DIR)/$(@:%=%.d)
342 ifeq ($(USE_CLANG),)
343 ifneq ($(CC_VER_MAJOR), 2)
344 DEPFLAGS += -fpch-deps
345 endif
346 endif
347
348 # -DDONT_USE_PRECOMPILED_HEADER will exclude all includes in precompiled.hpp.
349 ifeq ($(USE_PRECOMPILED_HEADER),0)
350 CFLAGS += -DDONT_USE_PRECOMPILED_HEADER
351 endif
352
353 ifeq ($(OS_VENDOR), Darwin)
354 # Setting these parameters makes it an error to link to macosx APIs that are
355 # newer than the given OS version and makes the linked binaries compatible even
356 # if built on a newer version of the OS.
357 # The expected format is X.Y.Z
358 ifeq ($(MACOSX_VERSION_MIN),)
359 MACOSX_VERSION_MIN=10.7.0
360 endif
361 # The macro takes the version with no dots, ex: 1070
362 CFLAGS += -DMAC_OS_X_VERSION_MAX_ALLOWED=$(subst .,,$(MACOSX_VERSION_MIN)) \
363 -mmacosx-version-min=$(MACOSX_VERSION_MIN)
364 LDFLAGS += -mmacosx-version-min=$(MACOSX_VERSION_MIN)
365 endif
366
367
368 #------------------------------------------------------------------------
369 # Assembler flags
370
371 # Enforce prerpocessing of .s files
372 ASFLAGS += -x assembler-with-cpp
373
374 #------------------------------------------------------------------------
375 # Linker flags
376
377 # statically link libstdc++.so, work with gcc but ignored by g++
378 STATIC_STDCXX = -Wl,-Bstatic -lstdc++ -Wl,-Bdynamic
379
380 # Ensure use libstdc++ on clang, not libc++
381 ifeq ($(USE_CLANG), true)
382 LFLAGS += -stdlib=libstdc++
383 endif
384
385 ifeq ($(USE_CLANG),)
386 # statically link libgcc and/or libgcc_s, libgcc does not exist before gcc-3.x.
387 ifneq ($(CC_VER_MAJOR), 2)
388 STATIC_LIBGCC += -static-libgcc
389 endif
390
391 ifneq ($(OS_VENDOR), Darwin)
392 ifneq (, findstring(debug,$(BUILD_FLAVOR)))
393 # for relocations read-only
394 LFLAGS += -Xlinker -z -Xlinker relro
395
396 ifeq ($(BUILD_FLAVOR), debug)
397 # disable incremental relocations linking
398 LFLAGS += -Xlinker -z -Xlinker now
399 endif
400 endif
401 endif
402
403 ifeq ($(BUILDARCH), ia64)
404 LFLAGS += -Wl,-relax
405 endif
406 endif
407
408 # Use $(MAPFLAG:FILENAME=real_file_name) to specify a map file.
409 MAPFLAG = -Xlinker --version-script=FILENAME
410
411 #
412 # Shared Library
413 #
414 ifeq ($(OS_VENDOR), Darwin)
415 # Standard linker flags
416 LFLAGS +=
417
418 # The apple linker has its own variant of mapfiles/version-scripts
419 MAPFLAG = -Xlinker -exported_symbols_list -Xlinker FILENAME
420
421 # Use $(SONAMEFLAG:SONAME=soname) to specify the intrinsic name of a shared obj
422 SONAMEFLAG =
423
424 # Build shared library
425 SHARED_FLAG = -Wl,-install_name,@rpath/$(@F) -dynamiclib -compatibility_version 1.0.0 -current_version 1.0.0 $(VM_PICFLAG)
426
427 # Keep symbols even they are not used
428 #AOUT_FLAGS += -Xlinker -export-dynamic
429 else
430 # Enable linker optimization
431 LFLAGS += -Xlinker -O1
432
433 # Use $(SONAMEFLAG:SONAME=soname) to specify the intrinsic name of a shared obj
434 SONAMEFLAG = -Xlinker -soname=SONAME
435
436 # Build shared library
437 SHARED_FLAG = -shared $(VM_PICFLAG)
438
439 # Keep symbols even they are not used
440 AOUT_FLAGS += -Xlinker -export-dynamic
441 endif
442
443 #------------------------------------------------------------------------
444 # Debug flags
445
446 ifeq ($(USE_CLANG), true)
447 # Restrict the debug information created by Clang to avoid
448 # too big object files and speed the build up a little bit
449 # (see http://llvm.org/bugs/show_bug.cgi?id=7554)
450 CFLAGS += -flimit-debug-info
451 endif
452
453 # Allow no optimizations.
454 DEBUG_CFLAGS=-O0
455
456 # DEBUG_BINARIES uses full -g debug information for all configs
457 ifeq ($(DEBUG_BINARIES), true)
458 CFLAGS += -g
459 else
460 # Use the stabs format for debugging information (this is the default
461 # on gcc-2.91). It's good enough, has all the information about line
462 # numbers and local variables, and libjvm.so is only about 16M.
463 # Change this back to "-g" if you want the most expressive format.
464 # (warning: that could easily inflate libjvm.so to 150M!)
465 # Note: The Itanium gcc compiler crashes when using -gstabs.
466 DEBUG_CFLAGS/ia64 = -g
467 DEBUG_CFLAGS/amd64 = -g
468 DEBUG_CFLAGS/arm = -g
469 DEBUG_CFLAGS/ppc = -g
470 DEBUG_CFLAGS += $(DEBUG_CFLAGS/$(BUILDARCH))
471 ifeq ($(DEBUG_CFLAGS/$(BUILDARCH)),)
472 ifeq ($(USE_CLANG), true)
473 # Clang doesn't understand -gstabs
474 DEBUG_CFLAGS += -g
475 else
476 DEBUG_CFLAGS += -gstabs
477 endif
478 endif
479
480 ifeq ($(ENABLE_FULL_DEBUG_SYMBOLS),1)
481 FASTDEBUG_CFLAGS/ia64 = -g
482 FASTDEBUG_CFLAGS/amd64 = -g
483 FASTDEBUG_CFLAGS/arm = -g
484 FASTDEBUG_CFLAGS/ppc = -g
485 FASTDEBUG_CFLAGS += $(FASTDEBUG_CFLAGS/$(BUILDARCH))
486 ifeq ($(FASTDEBUG_CFLAGS/$(BUILDARCH)),)
487 ifeq ($(USE_CLANG), true)
488 # Clang doesn't understand -gstabs
489 FASTDEBUG_CFLAGS += -g
490 else
491 FASTDEBUG_CFLAGS += -gstabs
492 endif
493 endif
494
495 OPT_CFLAGS/ia64 = -g
496 OPT_CFLAGS/amd64 = -g
497 OPT_CFLAGS/arm = -g
498 OPT_CFLAGS/ppc = -g
499 OPT_CFLAGS += $(OPT_CFLAGS/$(BUILDARCH))
500 ifeq ($(OPT_CFLAGS/$(BUILDARCH)),)
501 ifeq ($(USE_CLANG), true)
502 # Clang doesn't understand -gstabs
503 OPT_CFLAGS += -g
504 else
505 OPT_CFLAGS += -gstabs
506 endif
507 endif
508 endif
509 endif
510
511 ifeq ($(USE_CLANG),)
512 # Enable bounds checking.
513 ifeq "$(shell expr \( $(CC_VER_MAJOR) \> 3 \) )" "1"
514 # stack smashing checks.
515 DEBUG_CFLAGS += -fstack-protector-all --param ssp-buffer-size=1
516 endif
517 endif
518
519 # If we are building HEADLESS, pass on to VM
520 # so it can set the java.awt.headless property
521 ifdef HEADLESS
522 CFLAGS += -DHEADLESS
523 endif
524
525 # We are building Embedded for a small device
526 # favor code space over speed
527 ifdef MINIMIZE_RAM_USAGE
528 CFLAGS += -DMINIMIZE_RAM_USAGE
529 endif