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/aarch64 =
176 ARCHFLAG/ia64 =
177 ARCHFLAG/sparc = -m32 -mcpu=v9
178 ARCHFLAG/sparcv9 = -m64 -mcpu=v9
179 ARCHFLAG/arm = -fsigned-char
180 ARCHFLAG/zero = $(ZERO_ARCHFLAG)
181 ifndef E500V2
182 ARCHFLAG/ppc = -mcpu=powerpc
183 endif
184 ARCHFLAG/ppc64 = -m64
185
186 CFLAGS += $(ARCHFLAG)
187 AOUT_FLAGS += $(ARCHFLAG)
188 LFLAGS += $(ARCHFLAG)
189 ASFLAGS += $(ARCHFLAG)
190
191 ifdef E500V2
192 CFLAGS += -DE500V2
193 endif
194
195 # Use C++ Interpreter
196 ifdef CC_INTERP
197 CFLAGS += -DCC_INTERP
198 endif
199
200 # Keep temporary files (.ii, .s)
201 ifdef NEED_ASM
202 CFLAGS += -save-temps
203 else
204 CFLAGS += -pipe
205 endif
206
207 # Compiler warnings are treated as errors
208 WARNINGS_ARE_ERRORS = -Werror
209
210 ifeq ($(USE_CLANG), true)
211 # However we need to clean the code up before we can unrestrictedly enable this option with Clang
212 WARNINGS_ARE_ERRORS += -Wno-logical-op-parentheses -Wno-parentheses-equality -Wno-parentheses
213 WARNINGS_ARE_ERRORS += -Wno-switch -Wno-tautological-constant-out-of-range-compare -Wno-tautological-compare
214 WARNINGS_ARE_ERRORS += -Wno-delete-non-virtual-dtor -Wno-deprecated -Wno-format -Wno-dynamic-class-memaccess
215 WARNINGS_ARE_ERRORS += -Wno-return-type -Wno-empty-body
216 endif
217
218 WARNING_FLAGS = -Wpointer-arith -Wsign-compare -Wundef -Wunused-function -Wunused-value -Wformat=2 -Wreturn-type
219
220 ifeq ($(USE_CLANG),)
221 # Since GCC 4.3, -Wconversion has changed its meanings to warn these implicit
222 # conversions which might affect the values. Only enable it in earlier versions.
223 ifeq "$(shell expr \( $(CC_VER_MAJOR) \> 4 \) \| \( \( $(CC_VER_MAJOR) = 4 \) \& \( $(CC_VER_MINOR) \>= 3 \) \))" "0"
224 WARNING_FLAGS += -Wconversion
225 endif
226 endif
227
228 CFLAGS_WARN/DEFAULT = $(WARNINGS_ARE_ERRORS) $(WARNING_FLAGS)
229
230 # Special cases
231 CFLAGS_WARN/BYFILE = $(CFLAGS_WARN/$@)$(CFLAGS_WARN/DEFAULT$(CFLAGS_WARN/$@))
232
233 # optimization control flags (Used by fastdebug and release variants)
234 OPT_CFLAGS/NOOPT=-O0
235 OPT_CFLAGS/DEBUG=-O0
236 OPT_CFLAGS/SIZE=-Os
237 OPT_CFLAGS/SPEED=-O3
238
239 OPT_CFLAGS_DEFAULT ?= SPEED
240
241 # Hotspot uses very unstrict aliasing turn this optimization off
242 # This option is added to CFLAGS rather than OPT_CFLAGS
243 # so that OPT_CFLAGS overrides get this option too.
244 CFLAGS += -fno-strict-aliasing
245
246 ifdef OPT_CFLAGS
247 ifneq ("$(origin OPT_CFLAGS)", "command line")
248 $(error " Use OPT_EXTRAS instead of OPT_CFLAGS to add extra flags to OPT_CFLAGS.")
249 endif
250 endif
251
252 OPT_CFLAGS = $(OPT_CFLAGS/$(OPT_CFLAGS_DEFAULT)) $(OPT_EXTRAS)
253
254 # The gcc compiler segv's on ia64 when compiling bytecodeInterpreter.cpp
255 # if we use expensive-optimizations
256 ifeq ($(BUILDARCH), ia64)
257 OPT_CFLAGS += -fno-expensive-optimizations
258 endif
259
260 # Work around some compiler bugs.
261 ifeq ($(USE_CLANG), true)
262 ifeq ($(shell expr $(CC_VER_MAJOR) = 4 \& $(CC_VER_MINOR) = 2), 1)
263 OPT_CFLAGS/loopTransform.o += $(OPT_CFLAGS/NOOPT)
264 endif
265 else
266 # 6835796. Problem in GCC 4.3.0 with mulnode.o optimized compilation.
267 ifeq ($(shell expr $(CC_VER_MAJOR) = 4 \& $(CC_VER_MINOR) = 3), 1)
268 OPT_CFLAGS/mulnode.o += $(OPT_CFLAGS/NOOPT)
269 endif
270 endif
271
272 # Flags for generating make dependency flags.
273 DEPFLAGS = -MMD -MP -MF $(DEP_DIR)/$(@:%=%.d)
274 ifeq ($(USE_CLANG),)
275 ifneq ($(CC_VER_MAJOR), 2)
276 DEPFLAGS += -fpch-deps
277 endif
278 endif
279
280 #------------------------------------------------------------------------
281 # Linker flags
282
283 # statically link libstdc++.so, work with gcc but ignored by g++
284 STATIC_STDCXX = -Wl,-Bstatic -lstdc++ -Wl,-Bdynamic
285
286 # Enable linker optimization
287 LFLAGS += -Xlinker -O1
288
289 ifeq ($(USE_CLANG),)
290 STATIC_LIBGCC += -static-libgcc
291
292 ifneq (, findstring(debug,$(BUILD_FLAVOR)))
293 # for relocations read-only
294 LFLAGS += -Xlinker -z -Xlinker relro
295
296 ifeq ($(BUILD_FLAVOR), debug)
297 # disable incremental relocations linking
298 LFLAGS += -Xlinker -z -Xlinker now
299 endif
300 endif
301
302 ifeq ($(BUILDARCH), ia64)
303 LFLAGS += -Wl,-relax
304 endif
305
306 # If this is a --hash-style=gnu system, use --hash-style=both
307 # The gnu .hash section won't work on some Linux systems like SuSE 10.
308 _HAS_HASH_STYLE_GNU:=$(shell $(CC) -dumpspecs | grep -- '--hash-style=gnu')
309 ifneq ($(_HAS_HASH_STYLE_GNU),)
310 LDFLAGS_HASH_STYLE = -Wl,--hash-style=both
311 endif
312 else
313 # Don't know how to find out the 'hash style' of a system as '-dumpspecs'
314 # doesn't work for Clang. So for now we'll alwys use --hash-style=both
315 LDFLAGS_HASH_STYLE = -Wl,--hash-style=both
316 endif
317
318 LFLAGS += $(LDFLAGS_HASH_STYLE)
319
320 # Use $(MAPFLAG:FILENAME=real_file_name) to specify a map file.
321 MAPFLAG = -Xlinker --version-script=FILENAME
322
323 # Use $(SONAMEFLAG:SONAME=soname) to specify the intrinsic name of a shared obj
324 SONAMEFLAG = -Xlinker -soname=SONAME
325
326 # Build shared library
327 SHARED_FLAG = -shared
328
329 # Keep symbols even they are not used
330 AOUT_FLAGS += -Xlinker -export-dynamic
331
332 #------------------------------------------------------------------------
333 # Debug flags
334
335 ifeq ($(USE_CLANG), true)
336 # Restrict the debug information created by Clang to avoid
337 # too big object files and speed the build up a little bit
338 # (see http://llvm.org/bugs/show_bug.cgi?id=7554)
339 CFLAGS += -flimit-debug-info
340 endif
341
342 # Allow no optimizations.
343 DEBUG_CFLAGS=-O0
344
345 # DEBUG_BINARIES uses full -g debug information for all configs
346 ifeq ($(DEBUG_BINARIES), true)
347 CFLAGS += -g
348 else
349 DEBUG_CFLAGS += $(DEBUG_CFLAGS/$(BUILDARCH))
350 ifeq ($(DEBUG_CFLAGS/$(BUILDARCH)),)
351 DEBUG_CFLAGS += -g
352 endif
353
354 ifeq ($(ENABLE_FULL_DEBUG_SYMBOLS),1)
355 FASTDEBUG_CFLAGS += $(FASTDEBUG_CFLAGS/$(BUILDARCH))
356 ifeq ($(FASTDEBUG_CFLAGS/$(BUILDARCH)),)
357 FASTDEBUG_CFLAGS += -g
358 endif
359
360 OPT_CFLAGS += $(OPT_CFLAGS/$(BUILDARCH))
361 ifeq ($(OPT_CFLAGS/$(BUILDARCH)),)
362 OPT_CFLAGS += -g
363 endif
364 endif
365 endif
366
367 ifeq ($(USE_CLANG),)
368 # Enable bounds checking.
369 ifeq "$(shell expr \( $(CC_VER_MAJOR) \> 3 \) )" "1"
370 # stack smashing checks.
371 DEBUG_CFLAGS += -fstack-protector-all --param ssp-buffer-size=1
372 endif
373 endif
374
375
376 # If we are building HEADLESS, pass on to VM
377 # so it can set the java.awt.headless property
378 ifdef HEADLESS
379 CFLAGS += -DHEADLESS
380 endif
381
382 # We are building Embedded for a small device
383 # favor code space over speed
384 ifdef MINIMIZE_RAM_USAGE
385 CFLAGS += -DMINIMIZE_RAM_USAGE
386 endif
387
388 # Stack walking in the JVM relies on frame pointer (%rbp) to walk thread stack.
389 # Explicitly specify -fno-omit-frame-pointer because it is off by default
390 # starting with gcc 4.6.
391 ifndef USE_SUNCC
392 CFLAGS += -fno-omit-frame-pointer
393 endif