1 #
2 # Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved.
3 # Copyright (c) 2013 Red Hat, Inc.
4 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 #
6 # This code is free software; you can redistribute it and/or modify it
7 # under the terms of the GNU General Public License version 2 only, as
8 # published by the Free Software Foundation.
9 #
10 # This code is distributed in the hope that it will be useful, but WITHOUT
11 # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 # FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 # version 2 for more details (a copy is included in the LICENSE file that
14 # accompanied this code).
15 #
16 # You should have received a copy of the GNU General Public License version
17 # 2 along with this work; if not, write to the Free Software Foundation,
18 # Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 #
20 # Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 # or visit www.oracle.com if you need additional information or have any
22 # questions.
23 #
24 #
25
26 OS_VENDOR = $(shell uname -s)
27
28 #------------------------------------------------------------------------
29 # CC, CXX & AS
30
31 # If a SPEC is not set already, then use these defaults.
32 ifeq ($(SPEC),)
33 # When cross-compiling the ALT_COMPILER_PATH points
34 # to the cross-compilation toolset
35 ifdef CROSS_COMPILE_ARCH
36 CXX = $(ALT_COMPILER_PATH)/g++
37 CC = $(ALT_COMPILER_PATH)/gcc
38 HOSTCXX = g++
39 HOSTCC = gcc
40 else ifneq ($(OS_VENDOR), Darwin)
41 CXX = g++
42 CC = gcc
43 HOSTCXX = $(CXX)
44 HOSTCC = $(CC)
45 endif
46
47 # i486 hotspot requires -mstackrealign on Darwin.
48 # llvm-gcc supports this in Xcode 3.2.6 and 4.0.
49 # gcc-4.0 supports this on earlier versions.
50 # Prefer llvm-gcc where available.
51 ifeq ($(OS_VENDOR), Darwin)
52 ifeq ($(origin CXX), default)
53 CXX = llvm-g++
54 endif
55 ifeq ($(origin CC), default)
56 CC = llvm-gcc
57 endif
58
59 ifeq ($(ARCH), i486)
60 LLVM_SUPPORTS_STACKREALIGN := $(shell \
61 [ "0"`llvm-gcc -v 2>&1 | grep LLVM | sed -E "s/.*LLVM build ([0-9]+).*/\1/"` -gt "2333" ] \
62 && echo true || echo false)
63
64 ifeq ($(LLVM_SUPPORTS_STACKREALIGN), true)
65 CXX32 ?= llvm-g++
66 CC32 ?= llvm-gcc
67 else
68 CXX32 ?= g++-4.0
69 CC32 ?= gcc-4.0
70 endif
71 CXX = $(CXX32)
72 CC = $(CC32)
73 endif
74
75 HOSTCXX = $(CXX)
76 HOSTCC = $(CC)
77 endif
78
79 AS = $(CC) -c -x assembler-with-cpp
80 endif
81
82
83 # -dumpversion in gcc-2.91 shows "egcs-2.91.66". In later version, it only
84 # prints the numbers (e.g. "2.95", "3.2.1")
85 CC_VER_MAJOR := $(shell $(CC) -dumpversion | sed 's/egcs-//' | cut -d'.' -f1)
86 CC_VER_MINOR := $(shell $(CC) -dumpversion | sed 's/egcs-//' | cut -d'.' -f2)
87
88 # check for precompiled headers support
89 ifneq "$(shell expr \( $(CC_VER_MAJOR) \> 3 \) \| \( \( $(CC_VER_MAJOR) = 3 \) \& \( $(CC_VER_MINOR) \>= 4 \) \))" "0"
90 # Allow the user to turn off precompiled headers from the command line.
91 ifneq ($(USE_PRECOMPILED_HEADER),0)
92 PRECOMPILED_HEADER_DIR=.
93 PRECOMPILED_HEADER_SRC=$(GAMMADIR)/src/share/vm/precompiled/precompiled.hpp
94 PRECOMPILED_HEADER=$(PRECOMPILED_HEADER_DIR)/precompiled.hpp.gch
95 endif
96 endif
97
98
99 #------------------------------------------------------------------------
100 # Compiler flags
101
102 # position-independent code
103 PICFLAG = -fPIC
104
105 VM_PICFLAG/LIBJVM = $(PICFLAG)
106 VM_PICFLAG/AOUT =
107 VM_PICFLAG = $(VM_PICFLAG/$(LINK_INTO))
108
109 ifeq ($(TYPE),ZERO)
110 CFLAGS += $(LIBFFI_CFLAGS)
111 endif
112 ifeq ($(TYPE),SHARK)
113 CFLAGS += $(LIBFFI_CFLAGS)
114 CFLAGS += $(LLVM_CFLAGS)
115 endif
116 CFLAGS += $(VM_PICFLAG)
117 CFLAGS += -fno-rtti
118 CFLAGS += -fno-exceptions
119 CFLAGS += -pthread
120 CFLAGS += -fcheck-new
121 # version 4 and above support fvisibility=hidden (matches jni_x86.h file)
122 # except 4.1.2 gives pointless warnings that can't be disabled (afaik)
123 ifneq "$(shell expr \( $(CC_VER_MAJOR) \> 4 \) \| \( \( $(CC_VER_MAJOR) = 4 \) \& \( $(CC_VER_MINOR) \>= 3 \) \))" "0"
124 CFLAGS += -fvisibility=hidden
125 endif
126
127 ARCHFLAG = $(ARCHFLAG/$(BUILDARCH))
128 ARCHFLAG/i486 = -m32 -march=i586
129 ARCHFLAG/amd64 = -m64
130 ARCHFLAG/ia64 =
131 ARCHFLAG/sparc = -m32 -mcpu=v9
132 ARCHFLAG/sparcv9 = -m64 -mcpu=v9
133 ARCHFLAG/zero = $(ZERO_ARCHFLAG)
134
135 # Darwin-specific build flags
136 ifeq ($(OS_VENDOR), Darwin)
137 # Ineffecient 16-byte stack re-alignment on Darwin/IA32
138 ARCHFLAG/i486 += -mstackrealign
139 endif
140
141 CFLAGS += $(ARCHFLAG)
142 AOUT_FLAGS += $(ARCHFLAG)
143 LFLAGS += $(ARCHFLAG)
144 ASFLAGS += $(ARCHFLAG)
145
146 ifdef E500V2
147 CFLAGS += -DE500V2
148 endif
149
150 # Use C++ Interpreter
151 ifdef CC_INTERP
152 CFLAGS += -DCC_INTERP
153 endif
154
155 # Build for embedded targets
156 ifdef JAVASE_EMBEDDED
157 CFLAGS += -DJAVASE_EMBEDDED
158 endif
159
160 # Keep temporary files (.ii, .s)
161 ifdef NEED_ASM
162 CFLAGS += -save-temps
163 else
164 CFLAGS += -pipe
165 endif
166
167 # Compiler warnings are treated as errors
168 ifneq ($(COMPILER_WARNINGS_FATAL),false)
169 WARNINGS_ARE_ERRORS = -Werror
170 endif
171
172 # Except for a few acceptable ones
173 # Since GCC 4.3, -Wconversion has changed its meanings to warn these implicit
174 # conversions which might affect the values. To avoid that, we need to turn
175 # it off explicitly.
176 ifneq "$(shell expr \( $(CC_VER_MAJOR) \> 4 \) \| \( \( $(CC_VER_MAJOR) = 4 \) \& \( $(CC_VER_MINOR) \>= 3 \) \))" "0"
177 ACCEPTABLE_WARNINGS = -Wpointer-arith -Wsign-compare
178 else
179 ACCEPTABLE_WARNINGS = -Wpointer-arith -Wconversion -Wsign-compare
180 endif
181
182 CFLAGS_WARN/DEFAULT = $(WARNINGS_ARE_ERRORS) $(ACCEPTABLE_WARNINGS)
183 # Special cases
184 CFLAGS_WARN/BYFILE = $(CFLAGS_WARN/$@)$(CFLAGS_WARN/DEFAULT$(CFLAGS_WARN/$@))
185 # XXXDARWIN: for _dyld_bind_fully_image_containing_address
186 ifeq ($(OS_VENDOR), Darwin)
187 CFLAGS_WARN/os_bsd.o = $(CFLAGS_WARN/DEFAULT) -Wno-deprecated-declarations
188 endif
189
190
191 # The flags to use for an Optimized g++ build
192 ifeq ($(OS_VENDOR), Darwin)
193 # use -Os by default, unless -O3 can be proved to be worth the cost, as per policy
194 # <http://wikis.sun.com/display/OpenJDK/Mac+OS+X+Port+Compilers>
195 OPT_CFLAGS += -Os
196 else
197 OPT_CFLAGS += -O3
198 endif
199
200 # Hotspot uses very unstrict aliasing turn this optimization off
201 OPT_CFLAGS += -fno-strict-aliasing
202
203 # The gcc compiler segv's on ia64 when compiling bytecodeInterpreter.cpp
204 # if we use expensive-optimizations
205 ifeq ($(BUILDARCH), ia64)
206 OPT_CFLAGS += -fno-expensive-optimizations
207 endif
208
209 OPT_CFLAGS/NOOPT=-O0
210
211 # 6835796. Problem in GCC 4.3.0 with mulnode.o optimized compilation.
212 ifneq "$(shell expr \( \( $(CC_VER_MAJOR) = 4 \) \& \( $(CC_VER_MINOR) = 3 \) \))" "0"
213 OPT_CFLAGS/mulnode.o += -O0
214 endif
215
216 # Flags for generating make dependency flags.
217 ifneq ("${CC_VER_MAJOR}", "2")
218 DEPFLAGS = -fpch-deps -MMD -MP -MF $(DEP_DIR)/$(@:%=%.d)
219 endif
220
221 # -DDONT_USE_PRECOMPILED_HEADER will exclude all includes in precompiled.hpp.
222 ifeq ($(USE_PRECOMPILED_HEADER),0)
223 CFLAGS += -DDONT_USE_PRECOMPILED_HEADER
224 endif
225
226 #------------------------------------------------------------------------
227 # Linker flags
228
229 # statically link libstdc++.so, work with gcc but ignored by g++
230 STATIC_STDCXX = -Wl,-Bstatic -lstdc++ -Wl,-Bdynamic
231
232 # statically link libgcc and/or libgcc_s, libgcc does not exist before gcc-3.x.
233 ifneq ("${CC_VER_MAJOR}", "2")
234 STATIC_LIBGCC += -static-libgcc
235 endif
236
237 ifeq ($(BUILDARCH), ia64)
238 LFLAGS += -Wl,-relax
239 endif
240
241 # Use $(MAPFLAG:FILENAME=real_file_name) to specify a map file.
242 MAPFLAG = -Xlinker --version-script=FILENAME
243
244 #
245 # Shared Library
246 #
247 ifeq ($(OS_VENDOR), Darwin)
248 # Standard linker flags
249 LFLAGS +=
250
251 # The apple linker has its own variant of mapfiles/version-scripts
252 MAPFLAG = -Xlinker -exported_symbols_list -Xlinker FILENAME
253
254 # Use $(SONAMEFLAG:SONAME=soname) to specify the intrinsic name of a shared obj
255 SONAMEFLAG =
256
257 # Build shared library
258 SHARED_FLAG = -Wl,-install_name,@rpath/$(@F) -dynamiclib -compatibility_version 1.0.0 -current_version 1.0.0 $(VM_PICFLAG)
259
260 # Keep symbols even they are not used
261 #AOUT_FLAGS += -Xlinker -export-dynamic
262 else
263 # Enable linker optimization
264 LFLAGS += -Xlinker -O1
265
266 # Use $(SONAMEFLAG:SONAME=soname) to specify the intrinsic name of a shared obj
267 SONAMEFLAG = -Xlinker -soname=SONAME
268
269 # Build shared library
270 SHARED_FLAG = -shared $(VM_PICFLAG)
271
272 # Keep symbols even they are not used
273 AOUT_FLAGS += -Xlinker -export-dynamic
274 endif
275
276 #------------------------------------------------------------------------
277 # Debug flags
278
279 # Use the stabs format for debugging information (this is the default
280 # on gcc-2.91). It's good enough, has all the information about line
281 # numbers and local variables, and libjvm_g.so is only about 16M.
282 # Change this back to "-g" if you want the most expressive format.
283 # (warning: that could easily inflate libjvm_g.so to 150M!)
284 # Note: The Itanium gcc compiler crashes when using -gstabs.
285 DEBUG_CFLAGS/ia64 = -g
286 DEBUG_CFLAGS/amd64 = -g
287 DEBUG_CFLAGS/arm = -g
288 DEBUG_CFLAGS/ppc = -g
289 DEBUG_CFLAGS += $(DEBUG_CFLAGS/$(BUILDARCH))
290 ifeq ($(DEBUG_CFLAGS/$(BUILDARCH)),)
291 DEBUG_CFLAGS += -gstabs
292 endif
293
294 # DEBUG_BINARIES overrides everything, use full -g debug information
295 ifeq ($(DEBUG_BINARIES), true)
296 DEBUG_CFLAGS = -g
297 CFLAGS += $(DEBUG_CFLAGS)
298 endif
299
300 # If we are building HEADLESS, pass on to VM
301 # so it can set the java.awt.headless property
302 ifdef HEADLESS
303 CFLAGS += -DHEADLESS
304 endif
305
306 # We are building Embedded for a small device
307 # favor code space over speed
308 ifdef MINIMIZE_RAM_USAGE
309 CFLAGS += -DMINIMIZE_RAM_USAGE
310 endif