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