1 #
2 # Copyright (c) 1999, 2011, 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 # 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 = $(ALT_COMPILER_PATH)/gcc
35 HOSTCXX = g++
36 HOSTCC = gcc
37 else ifneq ($(OS_VENDOR), Darwin)
38 CXX = g++
39 CXX = $(CXX)
40 CC = gcc
41 HOSTCXX = $(CXX)
42 HOSTCC = $(CC)
43 endif
44
45 # i486 hotspot requires -mstackrealign on Darwin.
46 # llvm-gcc supports this in Xcode 3.2.6 and 4.0.
47 # gcc-4.0 supports this on earlier versions.
48 # Prefer llvm-gcc where available.
49 ifeq ($(OS_VENDOR), Darwin)
50 ifeq ($(origin CXX), default)
51 CXX = llvm-g++
52 endif
53 ifeq ($(origin CC), default)
54 CC = llvm-gcc
55 endif
56
57 ifeq ($(ARCH), i486)
58 LLVM_SUPPORTS_STACKREALIGN := $(shell \
59 [ "0"`llvm-gcc -v 2>&1 | grep LLVM | sed -E "s/.*LLVM build ([0-9]+).*/\1/"` -gt "2333" ] \
60 && echo true || echo false)
61
62 ifeq ($(LLVM_SUPPORTS_STACKREALIGN), true)
63 CXX32 ?= llvm-g++
64 CC32 ?= llvm-gcc
65 else
66 CXX32 ?= g++-4.0
67 CC32 ?= gcc-4.0
68 endif
69 CXX = $(CXX32)
70 CC = $(CC32)
71 endif
72
73 HOSTCXX = $(CXX)
74 HOSTCC = $(CC)
75 endif
76
77 AS = $(CC) -c -x assembler-with-cpp
78
79 # -dumpversion in gcc-2.91 shows "egcs-2.91.66". In later version, it only
80 # prints the numbers (e.g. "2.95", "3.2.1")
81 CC_VER_MAJOR := $(shell $(CC) -dumpversion | sed 's/egcs-//' | cut -d'.' -f1)
82 CC_VER_MINOR := $(shell $(CC) -dumpversion | sed 's/egcs-//' | cut -d'.' -f2)
83
84 # check for precompiled headers support
85 ifneq "$(shell expr \( $(CC_VER_MAJOR) \> 3 \) \| \( \( $(CC_VER_MAJOR) = 3 \) \& \( $(CC_VER_MINOR) \>= 4 \) \))" "0"
86 # Allow the user to turn off precompiled headers from the command line.
87 ifneq ($(USE_PRECOMPILED_HEADER),0)
88 PRECOMPILED_HEADER_DIR=.
89 PRECOMPILED_HEADER_SRC=$(GAMMADIR)/src/share/vm/precompiled/precompiled.hpp
90 PRECOMPILED_HEADER=$(PRECOMPILED_HEADER_DIR)/precompiled.hpp.gch
91 endif
92 endif
93
94
95 #------------------------------------------------------------------------
96 # Compiler flags
97
98 # position-independent code
99 PICFLAG = -fPIC
100
101 VM_PICFLAG/LIBJVM = $(PICFLAG)
102 VM_PICFLAG/AOUT =
103 VM_PICFLAG = $(VM_PICFLAG/$(LINK_INTO))
104
105 ifeq ($(ZERO_BUILD), true)
106 CFLAGS += $(LIBFFI_CFLAGS)
107 endif
108 ifeq ($(SHARK_BUILD), true)
109 CFLAGS += $(LLVM_CFLAGS)
110 endif
111 CFLAGS += $(VM_PICFLAG)
112 CFLAGS += -fno-rtti
113 CFLAGS += -fno-exceptions
114 CFLAGS += -pthread
115 CFLAGS += -fcheck-new
116 # version 4 and above support fvisibility=hidden (matches jni_x86.h file)
117 # except 4.1.2 gives pointless warnings that can't be disabled (afaik)
118 ifneq "$(shell expr \( $(CC_VER_MAJOR) \> 4 \) \| \( \( $(CC_VER_MAJOR) = 4 \) \& \( $(CC_VER_MINOR) \>= 3 \) \))" "0"
119 CFLAGS += -fvisibility=hidden
120 endif
121
122 ARCHFLAG = $(ARCHFLAG/$(BUILDARCH))
123 ARCHFLAG/i486 = -m32 -march=i586
124 ARCHFLAG/amd64 = -m64
125 ARCHFLAG/ia64 =
126 ARCHFLAG/sparc = -m32 -mcpu=v9
127 ARCHFLAG/sparcv9 = -m64 -mcpu=v9
128 ARCHFLAG/zero = $(ZERO_ARCHFLAG)
129
130 # Darwin-specific build flags
131 ifeq ($(OS_VENDOR), Darwin)
132 # Ineffecient 16-byte stack re-alignment on Darwin/IA32
133 ARCHFLAG/i486 += -mstackrealign
134 endif
135
136 CFLAGS += $(ARCHFLAG)
137 AOUT_FLAGS += $(ARCHFLAG)
138 LFLAGS += $(ARCHFLAG)
139 ASFLAGS += $(ARCHFLAG)
140
141 ifdef E500V2
142 CFLAGS += -DE500V2
143 endif
144
145 # Use C++ Interpreter
146 ifdef CC_INTERP
147 CFLAGS += -DCC_INTERP
148 endif
149
150 # Build for embedded targets
151 ifdef JAVASE_EMBEDDED
152 CFLAGS += -DJAVASE_EMBEDDED
153 endif
154
155 # Keep temporary files (.ii, .s)
156 ifdef NEED_ASM
157 CFLAGS += -save-temps
158 else
159 CFLAGS += -pipe
160 endif
161
162 # Compiler warnings are treated as errors
163 ifneq ($(COMPILER_WARNINGS_FATAL),false)
164 WARNINGS_ARE_ERRORS = -Werror
165 endif
166
167 # Except for a few acceptable ones
168 # Since GCC 4.3, -Wconversion has changed its meanings to warn these implicit
169 # conversions which might affect the values. To avoid that, we need to turn
170 # it off explicitly.
171 ifneq "$(shell expr \( $(CC_VER_MAJOR) \> 4 \) \| \( \( $(CC_VER_MAJOR) = 4 \) \& \( $(CC_VER_MINOR) \>= 3 \) \))" "0"
172 ACCEPTABLE_WARNINGS = -Wpointer-arith -Wsign-compare
173 else
174 ACCEPTABLE_WARNINGS = -Wpointer-arith -Wconversion -Wsign-compare
175 endif
176
177 CFLAGS_WARN/DEFAULT = $(WARNINGS_ARE_ERRORS) $(ACCEPTABLE_WARNINGS)
178 # Special cases
179 CFLAGS_WARN/BYFILE = $(CFLAGS_WARN/$@)$(CFLAGS_WARN/DEFAULT$(CFLAGS_WARN/$@))
180 # XXXDARWIN: for _dyld_bind_fully_image_containing_address
181 ifeq ($(OS_VENDOR), Darwin)
182 CFLAGS_WARN/os_bsd.o = $(CFLAGS_WARN/DEFAULT) -Wno-deprecated-declarations
183 endif
184
185
186 # The flags to use for an Optimized g++ build
187 ifeq ($(OS_VENDOR), Darwin)
188 # use -Os by default, unless -O3 can be proved to be worth the cost, as per policy
189 # <http://wikis.sun.com/display/OpenJDK/Mac+OS+X+Port+Compilers>
190 OPT_CFLAGS += -Os
191 else
192 OPT_CFLAGS += -O3
193 endif
194
195 # Hotspot uses very unstrict aliasing turn this optimization off
196 OPT_CFLAGS += -fno-strict-aliasing
197
198 # The gcc compiler segv's on ia64 when compiling bytecodeInterpreter.cpp
199 # if we use expensive-optimizations
200 ifeq ($(BUILDARCH), ia64)
201 OPT_CFLAGS += -fno-expensive-optimizations
202 endif
203
204 OPT_CFLAGS/NOOPT=-O0
205
206 # 6835796. Problem in GCC 4.3.0 with mulnode.o optimized compilation.
207 ifneq "$(shell expr \( \( $(CC_VER_MAJOR) = 4 \) \& \( $(CC_VER_MINOR) = 3 \) \))" "0"
208 OPT_CFLAGS/mulnode.o += -O0
209 endif
210
211 # Flags for generating make dependency flags.
212 ifneq ("${CC_VER_MAJOR}", "2")
213 DEPFLAGS = -MMD -MP -MF $(DEP_DIR)/$(@:%=%.d)
214 endif
215
216 # -DDONT_USE_PRECOMPILED_HEADER will exclude all includes in precompiled.hpp.
217 ifeq ($(USE_PRECOMPILED_HEADER),0)
218 CFLAGS += -DDONT_USE_PRECOMPILED_HEADER
219 endif
220
221 #------------------------------------------------------------------------
222 # Linker flags
223
224 # statically link libstdc++.so, work with gcc but ignored by g++
225 STATIC_STDCXX = -Wl,-Bstatic -lstdc++ -Wl,-Bdynamic
226
227 # statically link libgcc and/or libgcc_s, libgcc does not exist before gcc-3.x.
228 ifneq ("${CC_VER_MAJOR}", "2")
229 STATIC_LIBGCC += -static-libgcc
230 endif
231
232 ifeq ($(BUILDARCH), ia64)
233 LFLAGS += -Wl,-relax
234 endif
235
236 # Use $(MAPFLAG:FILENAME=real_file_name) to specify a map file.
237 MAPFLAG = -Xlinker --version-script=FILENAME
238
239 #
240 # Shared Library
241 #
242 ifeq ($(OS_VENDOR), Darwin)
243 # Standard linker flags
244 LFLAGS +=
245
246 # Darwin doesn't use ELF and doesn't support version scripts
247 LDNOMAP = true
248
249 # Use $(SONAMEFLAG:SONAME=soname) to specify the intrinsic name of a shared obj
250 SONAMEFLAG =
251
252 # Build shared library
253 SHARED_FLAG = -Wl,-install_name,@rpath/$(@F) -dynamiclib -compatibility_version 1.0.0 -current_version 1.0.0 $(VM_PICFLAG)
254
255 # Keep symbols even they are not used
256 #AOUT_FLAGS += -Xlinker -export-dynamic
257 else
258 # Enable linker optimization
259 LFLAGS += -Xlinker -O1
260
261 # Use $(SONAMEFLAG:SONAME=soname) to specify the intrinsic name of a shared obj
262 SONAMEFLAG = -Xlinker -soname=SONAME
263
264 # Build shared library
265 SHARED_FLAG = -shared $(VM_PICFLAG)
266
267 # Keep symbols even they are not used
268 AOUT_FLAGS += -Xlinker -export-dynamic
269 endif
270
271 #------------------------------------------------------------------------
272 # Debug flags
273
274 # Use the stabs format for debugging information (this is the default
275 # on gcc-2.91). It's good enough, has all the information about line
276 # numbers and local variables, and libjvm_g.so is only about 16M.
277 # Change this back to "-g" if you want the most expressive format.
278 # (warning: that could easily inflate libjvm_g.so to 150M!)
279 # Note: The Itanium gcc compiler crashes when using -gstabs.
280 DEBUG_CFLAGS/ia64 = -g
281 DEBUG_CFLAGS/amd64 = -g
282 DEBUG_CFLAGS/arm = -g
283 DEBUG_CFLAGS/ppc = -g
284 DEBUG_CFLAGS += $(DEBUG_CFLAGS/$(BUILDARCH))
285 ifeq ($(DEBUG_CFLAGS/$(BUILDARCH)),)
286 DEBUG_CFLAGS += -gstabs
287 endif
288
289 # DEBUG_BINARIES overrides everything, use full -g debug information
290 ifeq ($(DEBUG_BINARIES), true)
291 DEBUG_CFLAGS = -g
292 CFLAGS += $(DEBUG_CFLAGS)
293 endif
294
295 # If we are building HEADLESS, pass on to VM
296 # so it can set the java.awt.headless property
297 ifdef HEADLESS
298 CFLAGS += -DHEADLESS
299 endif
300
301 # We are building Embedded for a small device
302 # favor code space over speed
303 ifdef MINIMIZE_RAM_USAGE
304 CFLAGS += -DMINIMIZE_RAM_USAGE
305 endif