1 #
2 # Copyright (c) 1999, 2012, 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 HOSTCXX = $(CXX)
75 HOSTCC = $(CC)
76 endif
77
78 AS = $(CC) -c -x assembler-with-cpp
79 endif
80
81
82 # -dumpversion in gcc-2.91 shows "egcs-2.91.66". In later version, it only
83 # prints the numbers (e.g. "2.95", "3.2.1")
84 CC_VER_MAJOR := $(shell $(CC) -dumpversion | sed 's/egcs-//' | cut -d'.' -f1)
85 CC_VER_MINOR := $(shell $(CC) -dumpversion | sed 's/egcs-//' | cut -d'.' -f2)
86
87 # check for precompiled headers support
88 ifneq "$(shell expr \( $(CC_VER_MAJOR) \> 3 \) \| \( \( $(CC_VER_MAJOR) = 3 \) \& \( $(CC_VER_MINOR) \>= 4 \) \))" "0"
89 # Allow the user to turn off precompiled headers from the command line.
90 ifneq ($(USE_PRECOMPILED_HEADER),0)
91 PRECOMPILED_HEADER_DIR=.
92 PRECOMPILED_HEADER_SRC=$(GAMMADIR)/src/share/vm/precompiled/precompiled.hpp
93 PRECOMPILED_HEADER=$(PRECOMPILED_HEADER_DIR)/precompiled.hpp.gch
94 endif
95 endif
96
97
98 #------------------------------------------------------------------------
99 # Compiler flags
100
101 # position-independent code
102 PICFLAG = -fPIC
103
104 VM_PICFLAG/LIBJVM = $(PICFLAG)
105 VM_PICFLAG/AOUT =
106 VM_PICFLAG = $(VM_PICFLAG/$(LINK_INTO))
107
108 ifeq ($(JVM_VARIANT_ZERO), true)
109 CFLAGS += $(LIBFFI_CFLAGS)
110 endif
111 ifeq ($(JVM_VARIANT_ZEROSHARK), true)
112 CFLAGS += $(LIBFFI_CFLAGS)
113 CFLAGS += $(LLVM_CFLAGS)
114 endif
115 CFLAGS += $(VM_PICFLAG)
116 CFLAGS += -fno-rtti
117 CFLAGS += -fno-exceptions
118 CFLAGS += -pthread
119 CFLAGS += -fcheck-new
120 # version 4 and above support fvisibility=hidden (matches jni_x86.h file)
121 # except 4.1.2 gives pointless warnings that can't be disabled (afaik)
122 ifneq "$(shell expr \( $(CC_VER_MAJOR) \> 4 \) \| \( \( $(CC_VER_MAJOR) = 4 \) \& \( $(CC_VER_MINOR) \>= 3 \) \))" "0"
123 CFLAGS += -fvisibility=hidden
124 endif
125
126 ARCHFLAG = $(ARCHFLAG/$(BUILDARCH))
127 ARCHFLAG/i486 = -m32 -march=i586
128 ARCHFLAG/amd64 = -m64
129 ARCHFLAG/ia64 =
130 ARCHFLAG/sparc = -m32 -mcpu=v9
131 ARCHFLAG/sparcv9 = -m64 -mcpu=v9
132 ARCHFLAG/zero = $(ZERO_ARCHFLAG)
133
134 # Darwin-specific build flags
135 ifeq ($(OS_VENDOR), Darwin)
136 # Ineffecient 16-byte stack re-alignment on Darwin/IA32
137 ARCHFLAG/i486 += -mstackrealign
138 endif
139
140 CFLAGS += $(ARCHFLAG)
141 AOUT_FLAGS += $(ARCHFLAG)
142 LFLAGS += $(ARCHFLAG)
143 ASFLAGS += $(ARCHFLAG)
144
145 ifdef E500V2
146 CFLAGS += -DE500V2
147 endif
148
149 # Use C++ Interpreter
150 ifdef CC_INTERP
151 CFLAGS += -DCC_INTERP
152 endif
153
154 # Keep temporary files (.ii, .s)
155 ifdef NEED_ASM
156 CFLAGS += -save-temps
157 else
158 CFLAGS += -pipe
159 endif
160
161 # Compiler warnings are treated as errors
162 ifneq ($(COMPILER_WARNINGS_FATAL),false)
163 WARNINGS_ARE_ERRORS = -Werror
164 endif
165
166 # Except for a few acceptable ones
167 # Since GCC 4.3, -Wconversion has changed its meanings to warn these implicit
168 # conversions which might affect the values. To avoid that, we need to turn
169 # it off explicitly.
170 ifneq "$(shell expr \( $(CC_VER_MAJOR) \> 4 \) \| \( \( $(CC_VER_MAJOR) = 4 \) \& \( $(CC_VER_MINOR) \>= 3 \) \))" "0"
171 ACCEPTABLE_WARNINGS = -Wpointer-arith -Wsign-compare
172 else
173 ACCEPTABLE_WARNINGS = -Wpointer-arith -Wconversion -Wsign-compare
174 endif
175
176 CFLAGS_WARN/DEFAULT = $(WARNINGS_ARE_ERRORS) $(ACCEPTABLE_WARNINGS)
177 # Special cases
178 CFLAGS_WARN/BYFILE = $(CFLAGS_WARN/$@)$(CFLAGS_WARN/DEFAULT$(CFLAGS_WARN/$@))
179 # XXXDARWIN: for _dyld_bind_fully_image_containing_address
180 ifeq ($(OS_VENDOR), Darwin)
181 CFLAGS_WARN/os_bsd.o = $(CFLAGS_WARN/DEFAULT) -Wno-deprecated-declarations
182 endif
183
184 OPT_CFLAGS/SIZE=-Os
185 OPT_CFLAGS/SPEED=-O3
186
187 # Hotspot uses very unstrict aliasing turn this optimization off
188 OPT_EXTRAS += -fno-strict-aliasing
189
190 # The gcc compiler segv's on ia64 when compiling bytecodeInterpreter.cpp
191 # if we use expensive-optimizations
192 ifeq ($(BUILDARCH), ia64)
193 OPT_EXTRAS += -fno-expensive-optimizations
194 endif
195
196 # The flags to use for an Optimized g++ build
197 ifeq ($(OS_VENDOR), Darwin)
198 # use -Os by default, unless -O3 can be proved to be worth the cost, as per policy
199 # <http://wikis.sun.com/display/OpenJDK/Mac+OS+X+Port+Compilers>
200 OPT_CFLAGS_DEFAULT ?= SIZE
201 else
202 OPT_CFLAGS_DEFAULT ?= SPEED
203 endif
204
205 ifdef OPT_CFLAGS
206 $(error "Use OPT_CFLAGS_EXTRAS instead of OPT_CFLAGS to add extra flags to OPT_CFLAGS")
207 endif
208
209 OPT_CFLAGS = $(OPT_CFLAGS/$(OPT_CFLAGS_DEFAULT)) $(OPT_EXTRAS)
210
211 OPT_CFLAGS/NOOPT=-O0
212
213 # 6835796. Problem in GCC 4.3.0 with mulnode.o optimized compilation.
214 ifneq "$(shell expr \( \( $(CC_VER_MAJOR) = 4 \) \& \( $(CC_VER_MINOR) = 3 \) \))" "0"
215 OPT_CFLAGS/mulnode.o += -O0
216 endif
217
218 # Flags for generating make dependency flags.
219 ifneq ("${CC_VER_MAJOR}", "2")
220 DEPFLAGS = -fpch-deps -MMD -MP -MF $(DEP_DIR)/$(@:%=%.d)
221 endif
222
223 # -DDONT_USE_PRECOMPILED_HEADER will exclude all includes in precompiled.hpp.
224 ifeq ($(USE_PRECOMPILED_HEADER),0)
225 CFLAGS += -DDONT_USE_PRECOMPILED_HEADER
226 endif
227
228 #------------------------------------------------------------------------
229 # Linker flags
230
231 # statically link libstdc++.so, work with gcc but ignored by g++
232 STATIC_STDCXX = -Wl,-Bstatic -lstdc++ -Wl,-Bdynamic
233
234 # statically link libgcc and/or libgcc_s, libgcc does not exist before gcc-3.x.
235 ifneq ("${CC_VER_MAJOR}", "2")
236 STATIC_LIBGCC += -static-libgcc
237 endif
238
239 ifeq ($(BUILDARCH), ia64)
240 LFLAGS += -Wl,-relax
241 endif
242
243 # Use $(MAPFLAG:FILENAME=real_file_name) to specify a map file.
244 MAPFLAG = -Xlinker --version-script=FILENAME
245
246 #
247 # Shared Library
248 #
249 ifeq ($(OS_VENDOR), Darwin)
250 # Standard linker flags
251 LFLAGS +=
252
253 # Darwin doesn't use ELF and doesn't support version scripts
254 LDNOMAP = true
255
256 # Use $(SONAMEFLAG:SONAME=soname) to specify the intrinsic name of a shared obj
257 SONAMEFLAG =
258
259 # Build shared library
260 SHARED_FLAG = -Wl,-install_name,@rpath/$(@F) -dynamiclib -compatibility_version 1.0.0 -current_version 1.0.0 $(VM_PICFLAG)
261
262 # Keep symbols even they are not used
263 #AOUT_FLAGS += -Xlinker -export-dynamic
264 else
265 # Enable linker optimization
266 LFLAGS += -Xlinker -O1
267
268 # Use $(SONAMEFLAG:SONAME=soname) to specify the intrinsic name of a shared obj
269 SONAMEFLAG = -Xlinker -soname=SONAME
270
271 # Build shared library
272 SHARED_FLAG = -shared $(VM_PICFLAG)
273
274 # Keep symbols even they are not used
275 AOUT_FLAGS += -Xlinker -export-dynamic
276 endif
277
278 #------------------------------------------------------------------------
279 # Debug flags
280
281 # Use the stabs format for debugging information (this is the default
282 # on gcc-2.91). It's good enough, has all the information about line
283 # numbers and local variables, and libjvm_g.so is only about 16M.
284 # Change this back to "-g" if you want the most expressive format.
285 # (warning: that could easily inflate libjvm_g.so to 150M!)
286 # Note: The Itanium gcc compiler crashes when using -gstabs.
287 DEBUG_CFLAGS/ia64 = -g
288 DEBUG_CFLAGS/amd64 = -g
289 DEBUG_CFLAGS/arm = -g
290 DEBUG_CFLAGS/ppc = -g
291 DEBUG_CFLAGS += $(DEBUG_CFLAGS/$(BUILDARCH))
292 ifeq ($(DEBUG_CFLAGS/$(BUILDARCH)),)
293 DEBUG_CFLAGS += -gstabs
294 endif
295
296 # DEBUG_BINARIES overrides everything, use full -g debug information
297 ifeq ($(DEBUG_BINARIES), true)
298 DEBUG_CFLAGS = -g
299 CFLAGS += $(DEBUG_CFLAGS)
300 endif
301
302 # If we are building HEADLESS, pass on to VM
303 # so it can set the java.awt.headless property
304 ifdef HEADLESS
305 CFLAGS += -DHEADLESS
306 endif
307
308 # We are building Embedded for a small device
309 # favor code space over speed
310 ifdef MINIMIZE_RAM_USAGE
311 CFLAGS += -DMINIMIZE_RAM_USAGE
312 endif