1 #
2 # Copyright (c) 1999, 2012, 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 include $(GAMMADIR)/make/defs.make
27
28 #------------------------------------------------------------------------
29 # CC, CXX & AS
30
31 # If a SPEC is not set already, then use these defaults.
32 ifeq ($(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 STRIP = $(ALT_COMPILER_PATH)/strip
41 else
42 CXX = g++
43 CC = gcc
44 HOSTCXX = $(CXX)
45 HOSTCC = $(CC)
46 STRIP = strip
47 endif
48 AS = $(CC) -c
49 endif
50
51
52 # -dumpversion in gcc-2.91 shows "egcs-2.91.66". In later version, it only
53 # prints the numbers (e.g. "2.95", "3.2.1")
54 CC_VER_MAJOR := $(shell $(CC) -dumpversion | sed 's/egcs-//' | cut -d'.' -f1)
55 CC_VER_MINOR := $(shell $(CC) -dumpversion | sed 's/egcs-//' | cut -d'.' -f2)
56
57 # check for precompiled headers support
58 ifneq "$(shell expr \( $(CC_VER_MAJOR) \> 3 \) \| \( \( $(CC_VER_MAJOR) = 3 \) \& \( $(CC_VER_MINOR) \>= 4 \) \))" "0"
59 # Allow the user to turn off precompiled headers from the command line.
60 ifneq ($(USE_PRECOMPILED_HEADER),0)
61 PRECOMPILED_HEADER_DIR=.
62 PRECOMPILED_HEADER_SRC=$(GAMMADIR)/src/share/vm/precompiled/precompiled.hpp
63 PRECOMPILED_HEADER=$(PRECOMPILED_HEADER_DIR)/precompiled.hpp.gch
64 endif
65 endif
66
67
68 #------------------------------------------------------------------------
69 # Compiler flags
70
71 # position-independent code
72 PICFLAG = -fPIC
73
74 VM_PICFLAG/LIBJVM = $(PICFLAG)
75 VM_PICFLAG/AOUT =
76 VM_PICFLAG = $(VM_PICFLAG/$(LINK_INTO))
77
78 ifeq ($(JVM_VARIANT_ZERO), true)
79 CFLAGS += $(LIBFFI_CFLAGS)
80 endif
81 ifeq ($(JVM_VARIANT_ZEROSHARK), true)
82 CFLAGS += $(LIBFFI_CFLAGS)
83 CFLAGS += $(LLVM_CFLAGS)
84 endif
85 CFLAGS += $(VM_PICFLAG)
86 CFLAGS += -fno-rtti
87 CFLAGS += -fno-exceptions
88 CFLAGS += -D_REENTRANT
89 CFLAGS += -fcheck-new
90 # version 4 and above support fvisibility=hidden (matches jni_x86.h file)
91 # except 4.1.2 gives pointless warnings that can't be disabled (afaik)
92 ifneq "$(shell expr \( $(CC_VER_MAJOR) \> 4 \) \| \( \( $(CC_VER_MAJOR) = 4 \) \& \( $(CC_VER_MINOR) \>= 3 \) \))" "0"
93 CFLAGS += -fvisibility=hidden
94 endif
95
96 ARCHFLAG = $(ARCHFLAG/$(BUILDARCH))
97 ARCHFLAG/i486 = -m32 -march=i586
98 ARCHFLAG/amd64 = -m64
99 ARCHFLAG/ia64 =
100 ARCHFLAG/sparc = -m32 -mcpu=v9
101 ARCHFLAG/sparcv9 = -m64 -mcpu=v9
102 ARCHFLAG/arm = -fsigned-char
103 ARCHFLAG/zero = $(ZERO_ARCHFLAG)
104 ifndef E500V2
105 ARCHFLAG/ppc = -mcpu=powerpc
106 endif
107
108 CFLAGS += $(ARCHFLAG)
109 AOUT_FLAGS += $(ARCHFLAG)
110 LFLAGS += $(ARCHFLAG)
111 ASFLAGS += $(ARCHFLAG)
112
113 ifdef E500V2
114 CFLAGS += -DE500V2
115 endif
116
117 # Use C++ Interpreter
118 ifdef CC_INTERP
119 CFLAGS += -DCC_INTERP
120 endif
121
122 # Build for embedded targets
123 ifdef JAVASE_EMBEDDED
124 CFLAGS += -DJAVASE_EMBEDDED
125 endif
126
127 # Keep temporary files (.ii, .s)
128 ifdef NEED_ASM
129 CFLAGS += -save-temps
130 else
131 CFLAGS += -pipe
132 endif
133
134 # Compiler warnings are treated as errors
135 WARNINGS_ARE_ERRORS = -Werror
136
137 # Except for a few acceptable ones
138 # Since GCC 4.3, -Wconversion has changed its meanings to warn these implicit
139 # conversions which might affect the values. To avoid that, we need to turn
140 # it off explicitly.
141 ifneq "$(shell expr \( $(CC_VER_MAJOR) \> 4 \) \| \( \( $(CC_VER_MAJOR) = 4 \) \& \( $(CC_VER_MINOR) \>= 3 \) \))" "0"
142 ACCEPTABLE_WARNINGS = -Wpointer-arith -Wsign-compare
143 else
144 ACCEPTABLE_WARNINGS = -Wpointer-arith -Wconversion -Wsign-compare
145 endif
146
147 CFLAGS_WARN/DEFAULT = $(WARNINGS_ARE_ERRORS) $(ACCEPTABLE_WARNINGS)
148 # Special cases
149 CFLAGS_WARN/BYFILE = $(CFLAGS_WARN/$@)$(CFLAGS_WARN/DEFAULT$(CFLAGS_WARN/$@))
150
151 # The flags to use for an Optimized g++ build
152 OPT_CFLAGS += -O3
153
154 # Hotspot uses very unstrict aliasing turn this optimization off
155 OPT_CFLAGS += -fno-strict-aliasing
156
157 # The gcc compiler segv's on ia64 when compiling bytecodeInterpreter.cpp
158 # if we use expensive-optimizations
159 ifeq ($(BUILDARCH), ia64)
160 OPT_CFLAGS += -fno-expensive-optimizations
161 endif
162
163 OPT_CFLAGS/NOOPT=-O0
164
165 # 6835796. Problem in GCC 4.3.0 with mulnode.o optimized compilation.
166 ifneq "$(shell expr \( \( $(CC_VER_MAJOR) = 4 \) \& \( $(CC_VER_MINOR) = 3 \) \))" "0"
167 OPT_CFLAGS/mulnode.o += -O0
168 endif
169
170 # Flags for generating make dependency flags.
171 ifneq ("${CC_VER_MAJOR}", "2")
172 DEPFLAGS = -fpch-deps -MMD -MP -MF $(DEP_DIR)/$(@:%=%.d)
173 endif
174
175 # -DDONT_USE_PRECOMPILED_HEADER will exclude all includes in precompiled.hpp.
176 ifeq ($(USE_PRECOMPILED_HEADER),0)
177 CFLAGS += -DDONT_USE_PRECOMPILED_HEADER
178 endif
179
180 #------------------------------------------------------------------------
181 # Linker flags
182
183 # statically link libstdc++.so, work with gcc but ignored by g++
184 STATIC_STDCXX = -Wl,-Bstatic -lstdc++ -Wl,-Bdynamic
185
186 # statically link libgcc and/or libgcc_s, libgcc does not exist before gcc-3.x.
187 ifneq ("${CC_VER_MAJOR}", "2")
188 STATIC_LIBGCC += -static-libgcc
189 endif
190
191 ifeq ($(BUILDARCH), ia64)
192 LFLAGS += -Wl,-relax
193 endif
194
195 # Enable linker optimization
196 LFLAGS += -Xlinker -O1
197
198 # If this is a --hash-style=gnu system, use --hash-style=both
199 # The gnu .hash section won't work on some Linux systems like SuSE 10.
200 _HAS_HASH_STYLE_GNU:=$(shell $(CC) -dumpspecs | grep -- '--hash-style=gnu')
201 ifneq ($(_HAS_HASH_STYLE_GNU),)
202 LDFLAGS_HASH_STYLE = -Wl,--hash-style=both
203 endif
204 LFLAGS += $(LDFLAGS_HASH_STYLE)
205
206 # Use $(MAPFLAG:FILENAME=real_file_name) to specify a map file.
207 MAPFLAG = -Xlinker --version-script=FILENAME
208
209 # Use $(SONAMEFLAG:SONAME=soname) to specify the intrinsic name of a shared obj
210 SONAMEFLAG = -Xlinker -soname=SONAME
211
212 # Build shared library
213 SHARED_FLAG = -shared
214
215 # Keep symbols even they are not used
216 AOUT_FLAGS += -Xlinker -export-dynamic
217
218 #------------------------------------------------------------------------
219 # Debug flags
220
221 # DEBUG_BINARIES uses full -g debug information for all configs
222 ifeq ($(DEBUG_BINARIES), true)
223 CFLAGS += -g
224 else
225 # Use the stabs format for debugging information (this is the default
226 # on gcc-2.91). It's good enough, has all the information about line
227 # numbers and local variables, and libjvm_g.so is only about 16M.
228 # Change this back to "-g" if you want the most expressive format.
229 # (warning: that could easily inflate libjvm_g.so to 150M!)
230 # Note: The Itanium gcc compiler crashes when using -gstabs.
231 DEBUG_CFLAGS/ia64 = -g
232 DEBUG_CFLAGS/amd64 = -g
233 DEBUG_CFLAGS/arm = -g
234 DEBUG_CFLAGS/ppc = -g
235 DEBUG_CFLAGS += $(DEBUG_CFLAGS/$(BUILDARCH))
236 ifeq ($(DEBUG_CFLAGS/$(BUILDARCH)),)
237 DEBUG_CFLAGS += -gstabs
238 endif
239
240 ifeq ($(ENABLE_FULL_DEBUG_SYMBOLS),1)
241 FASTDEBUG_CFLAGS/ia64 = -g
242 FASTDEBUG_CFLAGS/amd64 = -g
243 FASTDEBUG_CFLAGS/arm = -g
244 FASTDEBUG_CFLAGS/ppc = -g
245 FASTDEBUG_CFLAGS += $(DEBUG_CFLAGS/$(BUILDARCH))
246 ifeq ($(FASTDEBUG_CFLAGS/$(BUILDARCH)),)
247 FASTDEBUG_CFLAGS += -gstabs
248 endif
249
250 OPT_CFLAGS/ia64 = -g
251 OPT_CFLAGS/amd64 = -g
252 OPT_CFLAGS/arm = -g
253 OPT_CFLAGS/ppc = -g
254 OPT_CFLAGS += $(OPT_CFLAGS/$(BUILDARCH))
255 ifeq ($(OPT_CFLAGS/$(BUILDARCH)),)
256 OPT_CFLAGS += -gstabs
257 endif
258 endif
259 endif
260
261 # If we are building HEADLESS, pass on to VM
262 # so it can set the java.awt.headless property
263 ifdef HEADLESS
264 CFLAGS += -DHEADLESS
265 endif
266
267 # We are building Embedded for a small device
268 # favor code space over speed
269 ifdef MINIMIZE_RAM_USAGE
270 CFLAGS += -DMINIMIZE_RAM_USAGE
271 endif