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 #------------------------------------------------------------------------
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 CXX = g++
40 CC = gcc
41 HOSTCXX = $(CXX)
42 HOSTCC = $(CC)
43 STRIP = strip
44 endif
45 AS = $(CC) -c
46 endif
47
48
49 # -dumpversion in gcc-2.91 shows "egcs-2.91.66". In later version, it only
50 # prints the numbers (e.g. "2.95", "3.2.1")
51 CC_VER_MAJOR := $(shell $(CC) -dumpversion | sed 's/egcs-//' | cut -d'.' -f1)
52 CC_VER_MINOR := $(shell $(CC) -dumpversion | sed 's/egcs-//' | cut -d'.' -f2)
53
54 # check for precompiled headers support
55 ifneq "$(shell expr \( $(CC_VER_MAJOR) \> 3 \) \| \( \( $(CC_VER_MAJOR) = 3 \) \& \( $(CC_VER_MINOR) \>= 4 \) \))" "0"
56 # Allow the user to turn off precompiled headers from the command line.
57 ifneq ($(USE_PRECOMPILED_HEADER),0)
58 PRECOMPILED_HEADER_DIR=.
59 PRECOMPILED_HEADER_SRC=$(GAMMADIR)/src/share/vm/precompiled/precompiled.hpp
60 PRECOMPILED_HEADER=$(PRECOMPILED_HEADER_DIR)/precompiled.hpp.gch
61 endif
62 endif
63
64
65 #------------------------------------------------------------------------
66 # Compiler flags
67
68 # position-independent code
69 PICFLAG = -fPIC
70
71 VM_PICFLAG/LIBJVM = $(PICFLAG)
72 VM_PICFLAG/AOUT =
73 VM_PICFLAG = $(VM_PICFLAG/$(LINK_INTO))
74
75 ifeq ($(JVM_VARIANT_ZERO), true)
76 CFLAGS += $(LIBFFI_CFLAGS)
77 endif
78 ifeq ($(JVM_VARIANT_ZEROSHARK), true)
79 CFLAGS += $(LIBFFI_CFLAGS)
80 CFLAGS += $(LLVM_CFLAGS)
81 endif
82 CFLAGS += $(VM_PICFLAG)
83 CFLAGS += -fno-rtti
84 CFLAGS += -fno-exceptions
85 CFLAGS += -D_REENTRANT
86 CFLAGS += -fcheck-new
87 # version 4 and above support fvisibility=hidden (matches jni_x86.h file)
88 # except 4.1.2 gives pointless warnings that can't be disabled (afaik)
89 ifneq "$(shell expr \( $(CC_VER_MAJOR) \> 4 \) \| \( \( $(CC_VER_MAJOR) = 4 \) \& \( $(CC_VER_MINOR) \>= 3 \) \))" "0"
90 CFLAGS += -fvisibility=hidden
91 endif
92
93 ARCHFLAG = $(ARCHFLAG/$(BUILDARCH))
94 ARCHFLAG/i486 = -m32 -march=i586
95 ARCHFLAG/amd64 = -m64
96 ARCHFLAG/ia64 =
97 ARCHFLAG/sparc = -m32 -mcpu=v9
98 ARCHFLAG/sparcv9 = -m64 -mcpu=v9
99 ARCHFLAG/arm = -fsigned-char
100 ARCHFLAG/zero = $(ZERO_ARCHFLAG)
101 ifndef E500V2
102 ARCHFLAG/ppc = -mcpu=powerpc
103 endif
104
105 CFLAGS += $(ARCHFLAG)
106 AOUT_FLAGS += $(ARCHFLAG)
107 LFLAGS += $(ARCHFLAG)
108 ASFLAGS += $(ARCHFLAG)
109
110 ifdef E500V2
111 CFLAGS += -DE500V2
112 endif
113
114 # Use C++ Interpreter
115 ifdef CC_INTERP
116 CFLAGS += -DCC_INTERP
117 endif
118
119 # Keep temporary files (.ii, .s)
120 ifdef NEED_ASM
121 CFLAGS += -save-temps
122 else
123 CFLAGS += -pipe
124 endif
125
126 # Compiler warnings are treated as errors
127 WARNINGS_ARE_ERRORS = -Werror
128
129 # Except for a few acceptable ones
130 # Since GCC 4.3, -Wconversion has changed its meanings to warn these implicit
131 # conversions which might affect the values. To avoid that, we need to turn
132 # it off explicitly.
133 ifneq "$(shell expr \( $(CC_VER_MAJOR) \> 4 \) \| \( \( $(CC_VER_MAJOR) = 4 \) \& \( $(CC_VER_MINOR) \>= 3 \) \))" "0"
134 ACCEPTABLE_WARNINGS = -Wpointer-arith -Wsign-compare
135 else
136 ACCEPTABLE_WARNINGS = -Wpointer-arith -Wconversion -Wsign-compare
137 endif
138
139 CFLAGS_WARN/DEFAULT = $(WARNINGS_ARE_ERRORS) $(ACCEPTABLE_WARNINGS)
140 # Special cases
141 CFLAGS_WARN/BYFILE = $(CFLAGS_WARN/$@)$(CFLAGS_WARN/DEFAULT$(CFLAGS_WARN/$@))
142
143 # The flags to use for an Optimized g++ build
144 OPT_CFLAGS/SIZE=-Os
145 OPT_CFLAGS/SPEED=-O3
146
147 # Hotspot uses very unstrict aliasing turn this optimization off
148 # This option is added to CFLAGS rather than OPT_CFLAGS
149 # so that OPT_CFLAGS overrides get this option too.
150 CFLAGS += -fno-strict-aliasing
151
152 OPT_CFLAGS_DEFAULT ?= SPEED
153
154 ifdef OPT_CFLAGS
155 ifneq ("$(origin OPT_CFLAGS)", "command line")
156 $(error " Use OPT_EXTRAS instead of OPT_CFLAGS to add extra flags to OPT_CFLAGS.")
157 endif
158 endif
159
160 OPT_CFLAGS = $(OPT_CFLAGS/$(OPT_CFLAGS_DEFAULT)) $(OPT_EXTRAS)
161
162 # The gcc compiler segv's on ia64 when compiling bytecodeInterpreter.cpp
163 # if we use expensive-optimizations
164 ifeq ($(BUILDARCH), ia64)
165 OPT_CFLAGS += -fno-expensive-optimizations
166 endif
167
168 OPT_CFLAGS/NOOPT=-O0
169
170 # 6835796. Problem in GCC 4.3.0 with mulnode.o optimized compilation.
171 ifneq "$(shell expr \( \( $(CC_VER_MAJOR) = 4 \) \& \( $(CC_VER_MINOR) = 3 \) \))" "0"
172 OPT_CFLAGS/mulnode.o += -O0
173 endif
174
175 # Flags for generating make dependency flags.
176 ifneq ("${CC_VER_MAJOR}", "2")
177 DEPFLAGS = -fpch-deps -MMD -MP -MF $(DEP_DIR)/$(@:%=%.d)
178 endif
179
180 # -DDONT_USE_PRECOMPILED_HEADER will exclude all includes in precompiled.hpp.
181 ifeq ($(USE_PRECOMPILED_HEADER),0)
182 CFLAGS += -DDONT_USE_PRECOMPILED_HEADER
183 endif
184
185 #------------------------------------------------------------------------
186 # Linker flags
187
188 # statically link libstdc++.so, work with gcc but ignored by g++
189 STATIC_STDCXX = -Wl,-Bstatic -lstdc++ -Wl,-Bdynamic
190
191 # statically link libgcc and/or libgcc_s, libgcc does not exist before gcc-3.x.
192 ifneq ("${CC_VER_MAJOR}", "2")
193 STATIC_LIBGCC += -static-libgcc
194 endif
195
196 ifeq ($(BUILDARCH), ia64)
197 LFLAGS += -Wl,-relax
198 endif
199
200 # Enable linker optimization
201 LFLAGS += -Xlinker -O1
202
203 # If this is a --hash-style=gnu system, use --hash-style=both
204 # The gnu .hash section won't work on some Linux systems like SuSE 10.
205 _HAS_HASH_STYLE_GNU:=$(shell $(CC) -dumpspecs | grep -- '--hash-style=gnu')
206 ifneq ($(_HAS_HASH_STYLE_GNU),)
207 LDFLAGS_HASH_STYLE = -Wl,--hash-style=both
208 endif
209 LFLAGS += $(LDFLAGS_HASH_STYLE)
210
211 # Use $(MAPFLAG:FILENAME=real_file_name) to specify a map file.
212 MAPFLAG = -Xlinker --version-script=FILENAME
213
214 # Use $(SONAMEFLAG:SONAME=soname) to specify the intrinsic name of a shared obj
215 SONAMEFLAG = -Xlinker -soname=SONAME
216
217 # Build shared library
218 SHARED_FLAG = -shared
219
220 # Keep symbols even they are not used
221 AOUT_FLAGS += -Xlinker -export-dynamic
222
223 #------------------------------------------------------------------------
224 # Debug flags
225
226 # DEBUG_BINARIES uses full -g debug information for all configs
227 ifeq ($(DEBUG_BINARIES), true)
228 CFLAGS += -g
229 else
230 # Use the stabs format for debugging information (this is the default
231 # on gcc-2.91). It's good enough, has all the information about line
232 # numbers and local variables, and libjvm.so is only about 16M.
233 # Change this back to "-g" if you want the most expressive format.
234 # (warning: that could easily inflate libjvm.so to 150M!)
235 # Note: The Itanium gcc compiler crashes when using -gstabs.
236 DEBUG_CFLAGS/ia64 = -g
237 DEBUG_CFLAGS/amd64 = -g
238 DEBUG_CFLAGS/arm = -g
239 DEBUG_CFLAGS/ppc = -g
240 DEBUG_CFLAGS += $(DEBUG_CFLAGS/$(BUILDARCH))
241 ifeq ($(DEBUG_CFLAGS/$(BUILDARCH)),)
242 DEBUG_CFLAGS += -gstabs
243 endif
244
245 ifeq ($(ENABLE_FULL_DEBUG_SYMBOLS),1)
246 FASTDEBUG_CFLAGS/ia64 = -g
247 FASTDEBUG_CFLAGS/amd64 = -g
248 FASTDEBUG_CFLAGS/arm = -g
249 FASTDEBUG_CFLAGS/ppc = -g
250 FASTDEBUG_CFLAGS += $(DEBUG_CFLAGS/$(BUILDARCH))
251 ifeq ($(FASTDEBUG_CFLAGS/$(BUILDARCH)),)
252 FASTDEBUG_CFLAGS += -gstabs
253 endif
254
255 OPT_CFLAGS/ia64 = -g
256 OPT_CFLAGS/amd64 = -g
257 OPT_CFLAGS/arm = -g
258 OPT_CFLAGS/ppc = -g
259 OPT_CFLAGS += $(OPT_CFLAGS/$(BUILDARCH))
260 ifeq ($(OPT_CFLAGS/$(BUILDARCH)),)
261 OPT_CFLAGS += -gstabs
262 endif
263 endif
264 endif
265
266 # If we are building HEADLESS, pass on to VM
267 # so it can set the java.awt.headless property
268 ifdef HEADLESS
269 CFLAGS += -DHEADLESS
270 endif
271
272 # We are building Embedded for a small device
273 # favor code space over speed
274 ifdef MINIMIZE_RAM_USAGE
275 CFLAGS += -DMINIMIZE_RAM_USAGE
276 endif