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 = $(CC) -c
84 endif
85
86 ifeq ($(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 CFLAGS += $(VM_PICFLAG)
189 CFLAGS += -fno-rtti
190 CFLAGS += -fno-exceptions
191 ifeq ($(USE_CLANG),)
192 CFLAGS += -pthread
193 CFLAGS += -fcheck-new
194 # version 4 and above support fvisibility=hidden (matches jni_x86.h file)
195 # except 4.1.2 gives pointless warnings that can't be disabled (afaik)
196 ifneq "$(shell expr \( $(CC_VER_MAJOR) \> 4 \) \| \( \( $(CC_VER_MAJOR) = 4 \) \& \( $(CC_VER_MINOR) \>= 3 \) \))" "0"
197 CFLAGS += -fvisibility=hidden
198 endif
199 else
200 CFLAGS += -fvisibility=hidden
201 endif
202
203 ifeq ($(USE_CLANG), true)
204 # Before Clang 3.1, we had to pass the stack alignment specification directly to llvm with the help of '-mllvm'
205 # Starting with version 3.1, Clang understands the '-mstack-alignment' (and rejects '-mllvm -stack-alignment')
206 ifneq "$(shell expr \( $(CC_VER_MAJOR) \> 3 \) \| \( \( $(CC_VER_MAJOR) = 3 \) \& \( $(CC_VER_MINOR) \>= 1 \) \))" "0"
207 STACK_ALIGNMENT_OPT = -mno-omit-leaf-frame-pointer -mstack-alignment=16
208 else
209 STACK_ALIGNMENT_OPT = -mno-omit-leaf-frame-pointer -mllvm -stack-alignment=16
210 endif
211 endif
212
213 ARCHFLAG = $(ARCHFLAG/$(BUILDARCH))
214 ARCHFLAG/i486 = -m32 -march=i586
215 ARCHFLAG/amd64 = -m64 $(STACK_ALIGNMENT_OPT)
216 ARCHFLAG/ia64 =
217 ARCHFLAG/sparc = -m32 -mcpu=v9
218 ARCHFLAG/sparcv9 = -m64 -mcpu=v9
219 ARCHFLAG/zero = $(ZERO_ARCHFLAG)
220
221 # Darwin-specific build flags
222 ifeq ($(OS_VENDOR), Darwin)
223 # Ineffecient 16-byte stack re-alignment on Darwin/IA32
224 ARCHFLAG/i486 += -mstackrealign
225 endif
226
227 CFLAGS += $(ARCHFLAG)
228 AOUT_FLAGS += $(ARCHFLAG)
229 LFLAGS += $(ARCHFLAG)
230 ASFLAGS += $(ARCHFLAG)
231
232 ifdef E500V2
233 CFLAGS += -DE500V2
234 endif
235
236 # Use C++ Interpreter
237 ifdef CC_INTERP
238 CFLAGS += -DCC_INTERP
239 endif
240
241 # Keep temporary files (.ii, .s)
242 ifdef NEED_ASM
243 CFLAGS += -save-temps
244 else
245 CFLAGS += -pipe
246 endif
247
248 # Compiler warnings are treated as errors
249 ifneq ($(COMPILER_WARNINGS_FATAL),false)
250 WARNINGS_ARE_ERRORS = -Werror
251 endif
252
253 ifeq ($(USE_CLANG), true)
254 # However we need to clean the code up before we can unrestrictedly enable this option with Clang
255 WARNINGS_ARE_ERRORS += -Wno-logical-op-parentheses -Wno-parentheses-equality -Wno-parentheses
256 WARNINGS_ARE_ERRORS += -Wno-switch -Wno-tautological-compare
257 # Not yet supported by clang in Xcode 4.6.2
258 # WARNINGS_ARE_ERRORS += -Wno-tautological-constant-out-of-range-compare
259 WARNINGS_ARE_ERRORS += -Wno-delete-non-virtual-dtor -Wno-deprecated -Wno-format -Wno-dynamic-class-memaccess
260 WARNINGS_ARE_ERRORS += -Wno-empty-body
261 endif
262
263 WARNING_FLAGS = -Wpointer-arith -Wsign-compare -Wundef -Wunused-function -Wformat=2
264
265 ifeq ($(USE_CLANG),)
266 # Since GCC 4.3, -Wconversion has changed its meanings to warn these implicit
267 # conversions which might affect the values. Only enable it in earlier versions.
268 ifeq "$(shell expr \( $(CC_VER_MAJOR) \> 4 \) \| \( \( $(CC_VER_MAJOR) = 4 \) \& \( $(CC_VER_MINOR) \>= 3 \) \))" "0"
269 WARNINGS_FLAGS += -Wconversion
270 endif
271 endif
272
273 CFLAGS_WARN/DEFAULT = $(WARNINGS_ARE_ERRORS) $(WARNING_FLAGS)
274 # Special cases
275 CFLAGS_WARN/BYFILE = $(CFLAGS_WARN/$@)$(CFLAGS_WARN/DEFAULT$(CFLAGS_WARN/$@))
276 # XXXDARWIN: for _dyld_bind_fully_image_containing_address
277 ifeq ($(OS_VENDOR), Darwin)
278 CFLAGS_WARN/os_bsd.o = $(CFLAGS_WARN/DEFAULT) -Wno-deprecated-declarations
279 endif
280
281 OPT_CFLAGS/SIZE=-Os
282 OPT_CFLAGS/SPEED=-O3
283
284 # Hotspot uses very unstrict aliasing turn this optimization off
285 # This option is added to CFLAGS rather than OPT_CFLAGS
286 # so that OPT_CFLAGS overrides get this option too.
287 CFLAGS += -fno-strict-aliasing
288
289 # The flags to use for an Optimized g++ build
290 ifeq ($(OS_VENDOR), Darwin)
291 # use -Os by default, unless -O3 can be proved to be worth the cost, as per policy
292 # <https://wiki.openjdk.java.net/display/MacOSXPort/Compiler+Errata>
293 OPT_CFLAGS_DEFAULT ?= SIZE
294 else
295 OPT_CFLAGS_DEFAULT ?= SPEED
296 endif
297
298 ifdef OPT_CFLAGS
299 ifneq ("$(origin OPT_CFLAGS)", "command line")
300 $(error " Use OPT_EXTRAS instead of OPT_CFLAGS to add extra flags to OPT_CFLAGS.")
301 endif
302 endif
303
304 OPT_CFLAGS = $(OPT_CFLAGS/$(OPT_CFLAGS_DEFAULT)) $(OPT_EXTRAS)
305
306 # The gcc compiler segv's on ia64 when compiling bytecodeInterpreter.cpp
307 # if we use expensive-optimizations
308 ifeq ($(BUILDARCH), ia64)
309 OPT_CFLAGS += -fno-expensive-optimizations
310 endif
311
312 OPT_CFLAGS/NOOPT=-O0
313
314 # Work around some compiler bugs.
315 ifeq ($(USE_CLANG), true)
316 # Known to fail with clang <= 7.0;
317 # do no optimize these on later clang until verified
318 OPT_CFLAGS/loopTransform.o += $(OPT_CFLAGS/NOOPT)
319 OPT_CFLAGS/unsafe.o += -O1
320 else
321 # 6835796. Problem in GCC 4.3.0 with mulnode.o optimized compilation.
322 ifeq ($(shell expr $(CC_VER_MAJOR) = 4 \& $(CC_VER_MINOR) = 3), 1)
323 OPT_CFLAGS/mulnode.o += $(OPT_CFLAGS/NOOPT)
324 endif
325 endif
326
327 # Flags for generating make dependency flags.
328 DEPFLAGS = -MMD -MP -MF $(DEP_DIR)/$(@:%=%.d)
329 ifeq ($(USE_CLANG),)
330 ifneq ($(CC_VER_MAJOR), 2)
331 DEPFLAGS += -fpch-deps
332 endif
333 endif
334
335 # -DDONT_USE_PRECOMPILED_HEADER will exclude all includes in precompiled.hpp.
336 ifeq ($(USE_PRECOMPILED_HEADER),0)
337 CFLAGS += -DDONT_USE_PRECOMPILED_HEADER
338 endif
339
340 ifeq ($(OS_VENDOR), Darwin)
341 # Setting these parameters makes it an error to link to macosx APIs that are
342 # newer than the given OS version and makes the linked binaries compatible even
343 # if built on a newer version of the OS.
344 # The expected format is X.Y.Z
345 ifeq ($(MACOSX_VERSION_MIN),)
346 MACOSX_VERSION_MIN=10.7.0
347 endif
348 # The macro takes the version with no dots, ex: 1070
349 CFLAGS += -DMAC_OS_X_VERSION_MAX_ALLOWED=$(subst .,,$(MACOSX_VERSION_MIN)) \
350 -mmacosx-version-min=$(MACOSX_VERSION_MIN)
351 LFLAGS += -mmacosx-version-min=$(MACOSX_VERSION_MIN)
352 endif
353
354
355 #------------------------------------------------------------------------
356 # Assembler flags
357
358 # Enforce prerpocessing of .s files
359 ASFLAGS += -x assembler-with-cpp
360
361 #------------------------------------------------------------------------
362 # Linker flags
363
364 # statically link libstdc++.so, work with gcc but ignored by g++
365 ifeq ($(OS_VENDOR), Darwin)
366 ifeq ($(USE_CLANG), true)
367 STATIC_STDCXX = -Wl,-Bstatic -lc++ -Wl,-Bdynamic
368 else
369 STATIC_STDCXX = -Wl,-Bstatic -lstdc++ -Wl,-Bdynamic
370 endif
371 else
372 STATIC_STDCXX = -Wl,-Bstatic -lstdc++ -Wl,-Bdynamic
373 endif
374
375 ifeq ($(USE_CLANG),)
376 # statically link libgcc and/or libgcc_s, libgcc does not exist before gcc-3.x.
377 ifneq ("${CC_VER_MAJOR}", "2")
378 STATIC_LIBGCC += -static-libgcc
379 endif
380
381 ifeq ($(BUILDARCH), ia64)
382 LFLAGS += -Wl,-relax
383 endif
384 endif
385
386 # Use $(MAPFLAG:FILENAME=real_file_name) to specify a map file.
387 MAPFLAG = -Xlinker --version-script=FILENAME
388
389 #
390 # Shared Library
391 #
392 ifeq ($(OS_VENDOR), Darwin)
393 # Standard linker flags
394 LFLAGS +=
395
396 # The apple linker has its own variant of mapfiles/version-scripts
397 MAPFLAG = -Xlinker -exported_symbols_list -Xlinker FILENAME
398
399 # Use $(SONAMEFLAG:SONAME=soname) to specify the intrinsic name of a shared obj
400 SONAMEFLAG =
401
402 # Build shared library
403 SHARED_FLAG = -Wl,-install_name,@rpath/$(@F) -dynamiclib -compatibility_version 1.0.0 -current_version 1.0.0 $(VM_PICFLAG)
404
405 # Keep symbols even they are not used
406 #AOUT_FLAGS += -Xlinker -export-dynamic
407 else
408 # Enable linker optimization
409 LFLAGS += -Xlinker -O1
410
411 # Use $(SONAMEFLAG:SONAME=soname) to specify the intrinsic name of a shared obj
412 SONAMEFLAG = -Xlinker -soname=SONAME
413
414 # Build shared library
415 SHARED_FLAG = -shared $(VM_PICFLAG)
416
417 # Keep symbols even they are not used
418 AOUT_FLAGS += -Xlinker -export-dynamic
419 endif
420
421 #------------------------------------------------------------------------
422 # Debug flags
423
424 ifeq ($(USE_CLANG), true)
425 # Restrict the debug information created by Clang to avoid
426 # too big object files and speed the build up a little bit
427 # (see http://llvm.org/bugs/show_bug.cgi?id=7554)
428 CFLAGS += -flimit-debug-info
429 endif
430
431 # DEBUG_BINARIES uses full -g debug information for all configs
432 ifeq ($(DEBUG_BINARIES), true)
433 CFLAGS += -g
434 else
435 # Use the stabs format for debugging information (this is the default
436 # on gcc-2.91). It's good enough, has all the information about line
437 # numbers and local variables, and libjvm.so is only about 16M.
438 # Change this back to "-g" if you want the most expressive format.
439 # (warning: that could easily inflate libjvm.so to 150M!)
440 # Note: The Itanium gcc compiler crashes when using -gstabs.
441 DEBUG_CFLAGS/ia64 = -g
442 DEBUG_CFLAGS/amd64 = -g
443 DEBUG_CFLAGS/arm = -g
444 DEBUG_CFLAGS/ppc = -g
445 DEBUG_CFLAGS += $(DEBUG_CFLAGS/$(BUILDARCH))
446 ifeq ($(DEBUG_CFLAGS/$(BUILDARCH)),)
447 DEBUG_CFLAGS += -gstabs
448 endif
449
450 ifeq ($(ENABLE_FULL_DEBUG_SYMBOLS),1)
451 FASTDEBUG_CFLAGS/ia64 = -g
452 FASTDEBUG_CFLAGS/amd64 = -g
453 FASTDEBUG_CFLAGS/arm = -g
454 FASTDEBUG_CFLAGS/ppc = -g
455 FASTDEBUG_CFLAGS += $(FASTDEBUG_CFLAGS/$(BUILDARCH))
456 ifeq ($(FASTDEBUG_CFLAGS/$(BUILDARCH)),)
457 ifeq ($(USE_CLANG), true)
458 # Clang doesn't understand -gstabs
459 FASTDEBUG_CFLAGS += -g
460 else
461 FASTDEBUG_CFLAGS += -gstabs
462 endif
463 endif
464
465 OPT_CFLAGS/ia64 = -g
466 OPT_CFLAGS/amd64 = -g
467 OPT_CFLAGS/arm = -g
468 OPT_CFLAGS/ppc = -g
469 OPT_CFLAGS += $(OPT_CFLAGS/$(BUILDARCH))
470 ifeq ($(OPT_CFLAGS/$(BUILDARCH)),)
471 ifeq ($(USE_CLANG), true)
472 # Clang doesn't understand -gstabs
473 OPT_CFLAGS += -g
474 else
475 OPT_CFLAGS += -gstabs
476 endif
477 endif
478 endif
479 endif
480
481 # If we are building HEADLESS, pass on to VM
482 # so it can set the java.awt.headless property
483 ifdef HEADLESS
484 CFLAGS += -DHEADLESS
485 endif
486
487 # We are building Embedded for a small device
488 # favor code space over speed
489 ifdef MINIMIZE_RAM_USAGE
490 CFLAGS += -DMINIMIZE_RAM_USAGE
491 endif